The University of Western Australia
Professor Stephen Powles
Director
Contact details
| Address | WA Herbicide Resistance Initiative The University of Western Australia (M086) 35 Stirling Highway CRAWLEY WA 6009 Australia |
|---|---|
| Phone | 6488 7833 |
| Fax | 6488 7834 |
| spowles@plants.uwa.edu.au | |
| Personal homepage | www.wahri.edu.au |
Biography
An international authority on all aspects of herbicide resistance from a basic biochemical understanding of how plants evolve resistance, through to practical on-farm management. I am equally interested in the generation of new knowledge through to application in cropping systems. One of the world's most highly cited plant scientists (ISI highly cited.com)
Key research
- Evolution, biochemistry, molecular genetic basis and management of herbicide resistance in plants.
Qualifications
DipAppSc W.Syd., MSc Mich. State, PhD A.N.U., FTSE
Publications
Stephen B. Powles: PUBLICATIONS,
1. Books:
2001 Herbicide Resistance and World Grains.
Editors: Stephen B Powles & Dale L Shaner
CRC Press. 2001.
1994 Herbicide Resistance in Plants: Biology & Biochemistry.
Editors: Stephen B. Powles & Joseph A.M. Holtum.
CRC Press. 1994.
2. Major Reviews:
Powles, S.B. (2008) Evolution in action: Glyphosate-resistant weeds threaten world crops. Outlooks on Pest Management, 19, 256-259.
Duke, S.O, Powles, S.B. (2008) Glyphosate: A once-in-a-century herbicide. Pest Management Science, 64, 319-325.
Powles, S.B. (2008) Evolved glyphosate-resistant weeds around the world: Lessons to be learnt. Pest Management Science, 64, 360-365.
Walsh, M.J., Powles, S.B. (2007) Management strategies for herbicide-resistant weed populations in Australian dryland crop-production systems. Weed Technology, 21, 332-338.
Powles, S.B. and C. Preston. (2006) Evolved glyphosate resistance in plants: Biochemical and genetic basis of resistance. Weed Technology, 20, 282-289.
Powles, S.B., Preston, C., Jutsum, A.R. and Bryan, I.B. (1997) Herbicide Resistance: Impact and Management. Advances in Agronomy. Vol. 58, 57-93.
Holt, J.S., Powles S.B. and Holtum, J.A.M. (1993) Mechanisms & agronomic aspects of herbicide resistance. Annual Review of Plant Biology. Vol. 44, 203-229.
Powles, S.B. (1984) Photoinhibition of photosynthesis induced by visible light. Annual Review of Plant Biology, Vol. 35, 15-44.
3. International Research Journals.
a) Effect of selection intensity on resistance evolution.
Busi, R., Yu, Q., Barrett-Lennard, R., Powles, S.B. (2008) Long distance pollen-mediated flow of herbicide resistance genes in Lolium rigidum. Theoretical & Applied Genetics, 117, 1281-1290.
Reboud, X., Majerus, N., Gasquez, J., Powles, S.B. (2007) Chlamydomonas reinhardtii as a model system for pro-active herbicide resistance evolution research. Biological Journal of the Linnean Society. 91, 257-266.
Neve, P., Powles, S.B. (2005) High survival frequencies at low herbicide use rates in populations of Lolium rigidum result in rapid evolution of herbicide resistance. Heredity, 95, 485-492.
Neve, P., Powles, S.B. (2005) Recurrent selection with reduced herbicide rates results in the rapid evolution of herbicide resistance in Lolium rigidum. Theoretical & Applied Genetics. 110, 1154-1166.
Preston, C., Powles, S.B. (2002) Evolution of herbicide resistance in weeds: Initial frequency of target site-based resistance to acetolactate synthase-inhibiting herbicides in Lolium rigidum. Heredity, 88, 8-13.
Rieger, M.A., Lamond, M., Preston, C., Powles, S.B., Roush, R.T. (2002) Pollen-mediated movement of herbicide resistance between commercial canola fields. Science. 296 (5577), 2386-2388.
Rieger, M.A., Potter, T.D., Preston, C., Powles, S.B. (2001) Hybridisation between Brassica napus L. and Raphanus raphanistrum L. under agronomic field conditions. Theoretical & Applied Genetics. 103, 555-560.
Rieger, M.A., Preston, C., Powles, S.B. (1999) Risks of gene flow from transgenic herbicide-resistant canola (Brassica napus) to weedy relatives in southern Australian cropping systems.
Aust. J. Agric. Res. 50, 115-128.
b) Evolved resistance to glyphosate.
Vila-Aiub, M.M., Balbi, M.C., Gundel, P.E., Ghersa, C.M., Powles, S.B. (2007) Evolution of glyphosate-resistant Johnson grass (Sorghum halepense) in glyphosate-resistant soybeans. Weed Science, 55, 566-571.
Yu, Q., Cairns, A., Powles, S.B. (2007) Glyphosate, paraquat and ACCase multiple herbicide resistance in a Lolium rigidum biotype. Planta, 225, 499-513.
Pedersen, B. P., Neve, P., Andreasen, C., Powles, S.B. (2007) Ecological fitness of a glyphosate resistant Lolium rigidum population: Growth and seed production along a competition gradient. Basic & Applied Ecology, 8, 258-268
Neve, P., Sadler, J., Powles, S.B. (2004). Multiple herbicide resistance in a glyphosate- resistant rigid ryegrass (Lolium rigidum) population. Weed Science 52: 920-928.
Neve, P., Diggle, A.J., Smith, F.P., Powles, S.B. (2003) Simulating evolution of glyphosate resistance in Lolium rigidum. I. Population biology of a rare resistance trait. Weed Research 43: 404-417.
Neve, P, Diggle, A.J., Smith, F.P., Powles, S.B. (2003) Simulating evolution of glyphosate resistance in Lolium rigidum. II. Past, present and future glyphosate use in Australian cropping. Weed Research 43: 418-427.
Powles, S.B. (2003) My View: Will glyphosate continue to aid world food production?
Weed Science, 51: 471.
Lorraine-Colwill, D.F., Powles, S.B., Hawkes, T.R., Hollinshead, P.H., Warner, S.A.J., Preston, C. (2003) Investigations into the mechanism of glyphosate resistance in Lolium rigidum. Pesticide Biochemistry and Physiology, 74, 62-72.
Lorraine-Colwill, D.F., Powles, S.B., Hawkes T.T., Preston, C. (2001) Inheritance of evolved glyphosate resistance in Lolium rigidum. Theoretical & Applied Genetics. 102, 545-550.
Lorraine-Colwill, DF., Hawkes, TR., Williams, PH., Warner, SJ., Sutton, PB., Powles, SB., Preston, C. (1999) Resistance to glyphosate in Lolium rigidum. Pesticide Science, 55, 486-503.
Powles, S.B., Lorraine-Colwill, D.F., Dellow, J.J., Preston, C. (1998) Evolved Resistance to glyphosate in rigid ryegrass (Lolium rigidum) in Australia. Weed Science. 46, 604-607.
c) Quantitative surveys of the geographic extent of herbicide resistance.
Owen, M.J., Powles, S.B. (2009) Distribution and frequency of herbicide-resistant wild oat (Avena spp.) across the Western Australian grain belt. Crop & Pasture Science, 60, 25-31.
Llewellyn, R.S., D’Emden, F.H., Owen, M.J., Powles, S.B. (2009) Herbicide resistance in rigid ryegrass (Lolium rigidum) has not led to higher weed densities in Western Australian cropping fields. Weed Science, 57, 61-65.
Walsh, M.J., Owen, M.J., Powles, S.B. (2007) Frequency and distribution of herbicide resistance in Raphanus raphanistrum populations randomly collected across the Western Australian wheatbelt. Weed Research, 47, 542-550.
Owen, M.J., Walsh, M.J, Llewellyn and Powles, S.B. (2007) Widespread occurrence of multiple herbicide resistance in Western Australian annual ryegrass (Lolium rigidum) populations. Australian J. Agricultural Research, 58, 711-718.
Llewellyn, R., Powles, S.B. (2001) High levels of herbicide resistance in rigid ryegrass (Lolium rigidum) in the wheatbelt of Western Australia. Weed Technology, 15, 242-248.
Walsh, M.J., Duane, R.D. and Powles, S.B. (2001) High frequency of chlorsulfuron resistant wild radish (Raphanus raphanistrum L.) populations across the Western Australian wheatbelt. Weed Technology. 15, 199-203.
d) Evolved resistance to acetyl coenzyme A carboxylase inhibiting herbicides.
Yu, Q., Collavo, A., Zheng, M.Q., Owen, M.J., Sattin, M., Powles, S.B. (2007) Diversity of acetyl-coenzyme A carboxylase mutations in resistant Lolium populations: Evaluation using clethodim. Plant Physiology, 145, 547-558.
Zhang, X., Powles, S.B. (2006b) Six amino acid substitutions in the carboxyl-transferase domain of the plastidic acetyl.CoA carboxylase gene are linked with resistance to herbicides in a Lolium rigidum population. New Phytologist, 172, 636-645.
Zhang, X, Powles, S.B. (2006a) The molecular basis for resistance to acetyl co-enzyme A carboxylase (ACCase) inhibiting herbicides in two target-based resistant biotypes of annual ryegrass (Lolium rigidum). Planta, 223, 550-557.
Delye, C., Zhang, X., Severine, M., Annick, M., Powles, S.B. (2005) Molecular bases for sensitivity to acetyl-coenzyme A carboxylase inhibitors in black-grass. Plant Physiology: 137, 794-806.
Maneechote, C., Samanwong, S., Zhang, X., Powles, S.B. (2005) Resistance to ACCase inhibiting herbicides in sprangletop (Leptochloa chinensis L.) Weed Science, 53, 290-295.
Delye, C., Zhang, X., Chalopin, C., Michel, S., Powles, S.B. (2003) An isoleucine residue within the carboxyl-transferase domain of multidomain acetyl-Coenzyme A carboxylase is a major determinant of sensitivity to aryloxyphenoxypropionate inhibitors but not to cyclohexanedione inhibitors. Plant Physiology. 132, 1716-1723
Matthews, N., Powles, S. B., Preston, C. (2000) Mechanisms of resistance to acetyl-coenzyme A carboxylase-inhibiting herbicides in a Hordeum leporinum population. Pest Management Science. 56:441-447.
Maneechote, C., Preston, C. Powles, S.B. (1997). A diclofop-methyl-resistant Avena sterilis biotype with a herbicide-resistance acetyl-coenzyme A carboxylase and enhanced metabolism of diclofop-methyl. Pestic. Sci. 49-105-114.
Tardif, F.J., Preston, C., Holtum, J.A.M., Powles, S.B. (1996) Resistance to acetyl-coenzyme A carboxylase inhibiting herbicides endowed by a single major gene encoding a resistant target site in a biotype of Lolium rigidum. Aust. J. Plant Physiol. 23: 15-23.
Maneechote, C. Holtum, J.A.M., Powles, S.B. (1994) Resistant acetyl-CoA carboxylase is a mechanism of herbicide resistance in a biotype of Avena sterilis ssp. ludoviciana. Plant & Cell Physiology, 35: 539-547.
Holtum, J.A.M., Hausler, R., Devine, M.D., Powles, S.B. (1994) Recovery of transmembrane potential in plants resistant to aryloxyphenoxypropanoate herbicides. A phenomenon awaiting explanation. Weed Science. 42: 293-301.
Tardif, F.J., Powles, S. B. (1994) Herbicide multiple-resistance in a Lolium rigidum biotype is endowed by multiple mechanisms: Isolation of a subset with resistant acetyl-CoA carboxylase. Physiol. Plantarum. 91: 488-494.
Tardif, F. J., Holtum, J.A.M., Powles, S.B. (1993) Occurrence of a herbicide resistant acetyl-co-enzyme A carboxylase mutant in annual ryegrass (Lolium rigidum) selected by sethoxydim. Planta. 190: 176-181.
Richter, J., Powles, S.B. (1993) Pollen expression of herbicide target site resistance genes in annual ryegrass (Lolium rigidum). Plant Physiology. 102: 1037-1041.
Barr, A.R., Mansooji, A.M., Holtum, J.A.M., Powles, S.B. (1992) The inheritance of herbicide resistance in Avena sterilis ssp. ludoviciana, biotype SAS1. Proc. 1st Int. Weed Control Congress. 70-72.
Mansooji, A.M., Holtum, J.A.M., Boutsalis, P., Matthews, J.M., Powles, S.B. (1992) Resistance to aryloxyphenoxypropionate herbicides in two wild oat species (Avena fatua and Avena sterilis ssp. ludoviciana). Weed Science. 40: 599-605.
Hausler, R.E., Holtum, J.A.M., Powles, S.B. (1991) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). IV. Correlation between membrane effects and resistance to graminicides. Plant Physiology. 97, 1035-43.
Holtum, J.A.M., Matthews, J.M., Liljegren, D.R., Powles, S.B. (1991) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). III. On the mechanism of resistance to diclofop-methyl. Plant Physiology. 97, 1026-34.
Matthews, J.M., Holtum, J.A.M., Liljegren, D.R., Furness, B., Powles, S.B. (1990) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). 1. Properties of the herbicide target enzymes acetyl-CoA carboxylase (ACC) and acetolactate synthase (ALS). Plant Physiology. 94. 1180-1186.
e) Evolved resistance to acetolactate synthase (ALS) inhibiting herbicides.
Yu, Q., Han, H., Powles, S.B. (2008) Mutations of the ALS gene endowing resistance to ALS-inhibiting herbicides in Lolium rigidum populations. Pest Management Science, 64, 1229-1236.
Yu, Q., Nelson, J., Jackson, M., Powles S.B. (2007) Molecular characterisation of resistance to ALS-inhibiting herbicides in Hordeum leporinum biotypes. Pest Management Science, 63, 918-927.
Yu, Q,. Zhang, X Q., Hashem, A., Walsh, M.J., Powles, S.B. (2003) ALS gene proline (197) mutations confer ALS herbicide resistance in eight separated wild radish (Raphanus raphanistrum) populations. Weed Science. 51, 831-838.
Boutsalis, P., Karotam, J., Powles, S.B. (1999) Molecular basis of resistance to acetolactate synthase-inhibiting herbicides in Sisymbrium orientale and Brassica tournefortii. Pesticide Science. 55, 507-516.
Boutsalis, P., Powles, S.B. (1998) Seedbank characteristics of ALS herbicide-resistant and susceptible Sisymbrium orientale. Weed Research. 38. 389-393.
Boutsalis, P., Powles, S.B. (1995) Inheritance and mechanism of resistance to herbicides inhibiting acetolactate synthase in Sonchus oleraceus L. Theoretical & Applied Genetics, 91: 242-247.
Boutsalis, P., Powles, S.B. (1995) Resistance of dicot weeds to acetolactate synthase (ALS) inhibiting herbicides in Australia. Weed Research. 39. 149-155.
Burnet, M. W.M., Christopher, J.T., Holtum, J. A. M., Powles, S. B. (1994) Identification of two mechanisms of resistance to sulfonylurea herbicides within one population of rigid ryegrass (Lolium rigidum) using a selective germination medium. Weed Science. 42: 468-473.
Christopher, J.T., Powles, S.B., Holtum, J.A.M. (1992) Resistance to acetolactate synthase inhibiting herbicides in annual ryegrass (Lolium rigidum) involves at least two mechanisms. Plant Physiology. 100, 1909-1913.
Christopher, J.T., Powles, S.B., Holtum, J.A.M., Liljegren, D.R. (1991) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). II. Chlorsulfuron resistance involves a wheat-like detoxification system. Plant Physiology, 95, 1036-45.
f) Cytochrome P450 enzyme endowed non-target-site based resistance.
Vila-Aiub, M.M., Neve, P., Powles, S.B. (2005) Resistance cost of a cytochrome P450 herbicide metabolism resistance mechanism but not an ACCase target site mutation in a multiple resistant Lolium rigidum population. New Phytologist, 167, 787-796.
Vila-Aiub, M.M., Neve, P., Steadman, K.J., Powles, S.B. (2005) Ecological fitness of a multiple herbicide resistant Lolium rigidum population: Dynamics of seed germination and seedling emergence of target-site versus metabolism-based resistant and susceptible phenotypes. Journal of Applied Ecology, 42, 288-298.
Tardif, F.J., Powles, S.B. (1999) Effect of malathion on resistance to soil-applied herbicides in a population of rigid ryegrass (Lolium rigidum). Weed Science, 47, 258-261
Preston, C, Powles, S.B. (1998) Amitrole inhibits diclofop metabolism and synergises diclofop-methyl in a diclofop-methyl-resistant biotype of Lolium rigidum. Pest. Biochem. Physiol. 62, 179-189.
Preston, C., Powles, S.B. (1997) Light-dependent enhanced metabolism of chlorotoluron in a substituted urea herbicide-resistant biotype of Lolium rigidum Gaud.. Planta 201: 202-208.
Hall, L.M., Moss, S.R., Powles, S. B. (1997) Mechanisms of resistance to aryloxyphenoxypropionate herbicides in two resistant biotypes of Alopecurus myosuroides (blackgrass): Herbicide metabolism as a cross-resistance mechanism. Pest. Biochem. Physiol. 57: 87-98.
Helvig, C., Tardif, F.J., Seyer, A., Powles, S.B., Mioskowski, C., Durst, F., Salaun, J.P. (1996). Selective inhibition of a cytochrome P450 enzyme in wheat that oxidises both the natural substrate lauric acid and the synthetic herbicide diclofop. Pest. Biochem. Physiol. 54:
Preston, C., Tardif, F.J., Christopher, J.T., Powles, S.B. (1996) Multiple resistance to dissimilar herbicide chemistries in a biotype of Lolium rigidum due to enhanced activity of several herbicide degrading enzymes. Pest. Biochem. Physiol. 54: 123-134.
Hall, L.M., Moss, S.R., Powles, S.B. (1995) Mechanism of resistance to chlorotoluron in two biotypes of the grass weed Alopecurus myosuroides. Pest. Biochem. Physiol. 53: 180-182.
Christopher, J.T., Preston, C., Powles, S.B. (1994) Malathion antagonizes metabolism-based chlorsulfuron resistance in Lolium rigidum. Pest. Biochem. & Physiol. 49: 172-182.
Burnet, M.W.M., Loveys, B.R., Holtum, J.A.M., Powles, S.B. (1993) A mechanism of chlortoluron resistance in Lolium rigidum. Planta. 190: 182-189.
Burnet, M.W.M., Loveys, B.R., Holtum, J.A.M., Powles, S.B. (1993) Increased detoxification is a mechanism of simazine resistance in Lolium rigidum. Pest Biochem & Physiol.46: 207-218.
Burnet, M.W., Hildebrand, O.B., Holtum, J.A.M., Powles, S.B. (1991) Amitrole, triazine, substituted urea and metribuzin resistance in a biotype of rigid ryegrass (Lolium rigidum). Weed Science, 39: 317-323.
g) Resistant plants displaying multiple herbicide resistance mechanisms.
Yu, Q., Friesen, S., Zhang, X., Powles, S.B. (2004) Tolerance to acetolactate synthase and acetyl-coenzyme A carboxylase inhibiting herbicides in Vulpia bromoides is conferred by two co-existing resistance mechanisms. Pesticide Biochemistry and Physiology, 78, 21-30.
Walsh, M.J., Powles, S.B., Beard, B., Parkin, B.T., Porter, S. (2004) Multiple herbicide resistance across four modes of action in wild radish (Raphanus raphanistrum L.) Weed Science. 52: 8-13.
Burnet, M. W.M., Holtum, J. A. M., Powles, S. B. (1994) Resistance to nine herbicide classes in a population of rigid ryegrass (Lolium rigidum). Weed Science. 42: 369-377.
McAlister, F.M., Powles, S.B., Holtum, J.A.M. (1995) Dinitroaniline herbicide resistance in rigid ryegrass (Lolium rigidum). Weed Science. 43: 55-62.
Burnet, M.W.M., Barr, A., Powles, S. B. (1994) Chloroacetamide resistance in rigid ryegrass (Lolium rigidum). Weed Science. 42: 153-157.
h) Evolved resistance to paraquat.
Yu, Q., Han, H., Nguyen L., Forster, J.W., Powles, S.B. (2009) Paraquat resistance in a Lolium rigidum population is governed by one major nuclear gene. Theoretical & Applied Genetics, 118, 1601-1608.
Preston, C., Soar, C.J., Hidayat, I., Greenfield, K. M., Powles, S.B. (2005) Differential translocation of paraquat in paraquat-resistant populations of Hordeum leporinum. Weed Research, 45, 289-295.
Soar, C.J., Karotam, J., Preston, C., Powles, S.B. (2004) Polyamines can inhibit paraquat toxicity and translocation in the broadleaf weed Arctotheca calendula. Pesticide Biochemistry and Physiology, 80: 94-105.
Yu, Q., Cairns, A., Powles, S.B. (2004) Paraquat resistance in a population of Lolium rigidum. Functional Plant Biology. 31: 247-254.
Soar, C.J., Karotam, J., Preston, C., Powles, S.B. (2003) Reduced paraquat translocation in paraquat resistant Arctotheca calendula (L.) Levyns is a consequence of the primary resistance mechanism not the cause. Pesticide Biochemistry & Physiology, 76, 91-98.
Alizadeh, H.M, Preston, C., Powles, S.B. (1998) Paraquat resistant biotypes of Hordeum glaucum from zero tillage wheat. Weed Research. 38, 139-142.
Purba, E., Preston, C., Powles, S.B. (1996) Growth and competitiveness of paraquat-resistant and susceptible biotypes of Hordeum leporinum Link. Weed Research. 36: 311-317.
Purba, E., Preston, C., Powles, S. B. (1995) The mechanism of resistance to paraquat is strongly temperature dependent in resistant Hordeum leporinum and Hordeum glaucum. Planta. 196: 464-468.
Preston. C., Balachandran, S., Powles, S. B. (1994) Investigations of mechanisms of resistance to bipyridyl herbicides in Arctotheca calendula (L) Levyns. Plant Cell & Env. 17: 1113-1123.
Purba, E., Preston, C., Powles, S.B. (1993) Paraquat resistance in a biotype of Vulpia bromoides (L) S.F. Gray. Weed Research. 33, 409-413.
Purba, E., Preston, C., Powles, S.B. (1993) Inheritance of bipyridyl herbicide resistance in Arctotheca calendula and Hordeum leporinum. Theoretical & Applied Genetics.87, 598-602
Preston, C., Holtum, J.A.M., Powles, S.B. (1992) On the mechanism of resistance to paraquat in Hordeum glaucum and H. leporinum. Delayed inhibition of photosynthetic O2 evolution after paraquat application. Plant Physiol. 100, 630-636.
Powles, S.B., Tucker, E.S., Morgan, T.W. (1992) Eradication of paraquat-resistant Hordeum glaucum Steud. by prevention of seed production for 3 years. Weed Research. 32: 207-211.
Preston, C., Holtum, J.A.M. Powles, S.B. (1991) Paraquat resistant plants are not more resistant to photoinhibition. Plant Physiology. 96: 314-318.
Tucker, E.S., Powles, S.B. (1991) A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat. Weed Science. 39: 159-162.
Islam, A.K.M.R., Powles, S.B. (1991) Attempts to transfer paraquat resistance from barley grass (Hordeum glaucum Steud) to barley and wheat. Weed Research. 31: 395-399.
Powles, S.B., Tucker, E.S., Morgan, T.W. (1989). A capeweed (Arctotheca calendula) biotype in Australia resistant to bipyridyl herbicides. Weed Science 37: 60-62.
Islam, A.K.M.R., Powles, S.B. (1988). Inheritance of resistance to paraquat in barley grass (Hordeum glaucum Steud). Weed Research 28: 393-397.
Tucker, E.S., Powles, S.B. (1988). The occurrence and distribution in south-eastern Australia of barley grass (Hordeum glaucum) resistant to paraquat. Plant Protection Quarterly. 3: 19-21.
Powles, S.B., Cornic, G. (1987) Mechanism of paraquat resistance in Hordeum glaucum. I. Studies with isolated organelles and enzymes. Aust. J. Plant Physiol. 14, 81-89.
Bishop, T.W., Powles, S.B., Cornic, G. (1987). Mechanism of paraquat resistance in Hordeum glaucum II. Paraquat uptake and translocation. Aust. J. Plant Physiol. 14: 539-547.
Powles, S.B. (1986) The appearance of a biotype of the weed, Hordeum glaucum, resistant to the herbicide paraquat. Weed Research 26, 167-172.
i) Target site resistance to photosystem two photosynthetic herbicides
Friesen, L.J., Powles, S.B. (2007) Physiological and molecular characterization of atrazine resistance in a wild radish population (Raphanus raphanistrum). Weed Technology, 21, 910-914.
Hashem, A., Dhammu, H.S., Powles, S.B., Bowran, D.G., Piper, T.J., Cheam, A.H. (2001) Triazine resistance in a biotype of wild radish (Raphanus raphanistrum) in Australia. Weed Technology. 15, 636-641
j) Simulation & bio-economic modelling of resistance and management.
Monjardino, M., Pannell, D.J., Powles, S.B. (2005) The economic value of glyphosate-resistant canola in the management of two widespread crop weeds in a Western Australian farming system. Agricultural Systems, 84, 297-315.
Monjardino, M., Pannell, D.J., Powles, S.B. (2004) The economic value of haying and green manuring in the integrated management of annual ryegrass and wild radish in a Western Australian farming system. Australian Journal of Experimental Agriculture. 44, 1195-1203.
Monjardino, M., Pannell, D.J., Powles, S.B. (2004) The economic value of pasture phases in the integrated management of annual ryegrass and wild radish in a Western Australian farming system. Australian Journal of Experimental Agriculture. 44, 265-271.
Pannell, D.J., Stewart, V., Monjardino, M., Bennett, A., Schmidt, C., Powles, S.B. (2004) RIM: a bioeconomic model for integrated weed management of Lolium rigidum in Western Australia. Agricultural Systems. 79, 305-325.
Monjardino, M., Pannell, D.J., Powles, S.B. (2003) Multi-species resistance and integrated management: A bio-economic model for integrated management of rigid ryegrass (Lolium rigidum) and wild radish (Raphanus raphanistrum). Weed Science, 51, 798-809.
k) Agronomic & economic management of resistance.
Borger, C.P.D., Yan, G., Scott, J.K., Walsh, M.J., Powles, S.B. (2008) Salsola tragus or S. australis (Chenopodiaceae) in Australia – untangling taxonomic confusion through molecular and cytological analyses. Australian Journal of Botany, 56, 600-608.
Walsh, M.J., Wilson, B.L., Powles, S.B. (2007) Residual activity of three herbicides following exposure to summer-autumn conditions on the surface of three Western Australian wheatbelt soils. Plant Protection Quarterly, 22, 113-120.
Borger CPD, Walsh, M, Scott, JK, Powles SB. (2007) Tumbleweeds in the Western Australian cropping system: seed dispersal characteristics of Salsola australis. Weed Research, 47, 406-414.
Llewellyn, R.S., Lindner, R.K., Pannell, D.J., Powles, S.B. (2007) Herbicide resistance and the adoption of integrated weed management by Western Australian grain growers. Agricultural Economics, 36, 121-128.
Steadman, K.J., Eaton, D.M., Plummer, J.A., Ferris, D.G., Powles, S.B. (2006) Late season non-selective herbicide application reduces Lolium rigidum seed numbers, seed viability and seedling fitness. Australian Journal of Agricultural Research, 57, 133-141.
Llewellyn, R.S., Pannell, D.J., Lindner, R.K., Powles, S.B. (2005) Targeting key perceptions when planning and evaluating extension. Australian Journal of Experimental Agriculture, 45, 1627-1633.
Walsh, M.J., Minkey, D.M., Powles, S.B. (2005) Field evaluation of preseason applications of residual herbicides to control annual ryegrass (Lolium rigidum). Plant Protection Quarterly. 20, 133-139.
Llewellyn R.S., Lindner, R., Pannell, D.J. Powles, S.B. (2004) Grain grower perceptions and use of integrated weed management. Australian Journal of Experimental Agriculture, 44, 993-1001.
Walsh, M.J., Devlin, R., Powles, S.B. (2004) Potential for preseason herbicide application to prevent weed emergence in the subsequent growing season. 1. Identification and evaluation of possible herbicides. Weed Technology, 18, 228-235.
Lllewellyn, R.S., Lindner, R.K., Pannell, D.J, Powles, S.B. (2002) Resistance and the herbicide resource: Perceptions of Western Australian grain growers. Crop Protection. 21, 1067-1075.
Llewellyn, R.S., Lindner, R.K., Pannell, D.J., Powles, S.B. (2001) Herbicide resistance and the decision to conserve the herbicide resource: review and framework. Australian Agribusiness Review 9.
Powles, S.B. (1997) Success from adversity: Herbicide resistance can drive changes to sustainable weed management systems. Brighton Crop Protection Conf 10B-1. 1119-1126.
Powles, S.B., Matthews, J.M. (1996) Integrated weed management for the control of herbicide resistant annual ryegrass (Lolium rigidum). Second International Weed Control Congress. Copenhagen. 407-413.
Nietschke, B.S., Reeves, T.G., Matthews, J.M., Powles, S.B. (1996) Components of an integrated weed management strategy to control herbicide-resistant Avena spp.-An Australian perspective. Second International Weed Control Congress. Copenhagen. 493-498.
Matthews, J.M., Powles, S.B. (1995) Managing herbicide resistant annual ryegrass: Southern Australian research. Eleventh Australian Weeds Conference. 537-541.
Powles, S.B., Charman, N., Poole, F. (1988) Solar heating (solarization) of the soil surface: Effect on weed control and yield of Phaseolus vulgaris. Plant Protection Quarterly. 3: 31-35.
l) Molecular basis of Lolium seed dormancy.
Goggin, D.E., Steadman, K.J., Powles, S.B. (2008) Green and blue light photoreceptors are involved in maintenance of dormancy in imbibed annual ryegrass (Lolium rigidum) seeds. New Phytologist, 180, 81-89.
m) Enhanced herbicide bio-degradation in soil.
Hole, SJW., McClure, NC., Powles, SB. (2001) Persistence and management of enhanced bio degradation in soil. Weed Research, 41, 341-349.
Hole, SJW., McClure, NC., Powles, SB. (2001) Rapid degradation of carbetamide upon repeated application to Australian soils. Soil Biology & Biochemistry, 33, 739-745.
Hole, S.J.W., Powles S.B. (1997) Reduced efficacy and enhanced degradation of carbetamide after repeated application in Australia. Weed Research 37, 165-170.
4. Book Chapters:
Vila-Aiub, M.M., Neve, P., Powles, S.B. (2005). Fitness costs of evolved herbicide resistance. In: Encyclopaedia of Pest Management. Ed. D. Pimmental. Marcel Dekker Publishers. NY. USA. pp.1-3.
Preston, C. and Powles, S.B. (2002) Mechanisms of multiple herbicide resistance in Lolium rigidum. In: Agrochemical Resistance: Extent, Mechanism & Detection. Eds. J.M. Clark & I. Yamaguchi, Oxford University Press. pp. 150-160.
Powles, S.B. and Bowran. D.G. (2000) Crop Weed Management Systems. In: Australian Weed Management Systems. Ed. B. Sindel. Publishers: R.G. & F.J. Richardson. pp. 287-306.
Rieger, M.A., Preston, C., Potter, T., Powles, S.B. (1999) Gene flow from transgenic canola to wild radish – a model system to determine the risks. In: Lutman, P.J.W. (Ed) Gene Flow and Agriculture: Relevance for Transgenic Crops. British Crop Protection Council, pp. 131-136
Powles, S.B. and Preston, C. (1999) Herbicide Resistance: A case of rapid evolution. In: Plants in Action: Adaptation in Nature, Performance in Cultivation. Ed. B. Atwell, P. Kriedemann and C. Turnbull. Pub: Macmillan Education Australia. pp. 607-613.
Tardif, F.J., Preston, C., Powles, S.B. (1997) Mechanisms of herbicide multiple resistance in Lolium rigidum. In: Weed and Crop Resistance to Herbicides. Ed. R. DePrado, J. Jorrin & L. Garcia-Torres. Kluwer Academic Publishers. pp.117-124.
Bowran, D.G., Hamblin, J., Powles, S.B. (1997) Incorporation of transgenic herbicide resistant crops into integrated weed management systems. In: Commercialisation of Transgenic Crops: Risk, Benefit and Trade Considerations. Ed. G.D. McLean, P.M.Waterhouse, G.Evans & M.J.Gibbs. D.P.I.E. Canberra, pp 301-312
Preston, C, Tardif, F.J., Powles, S.B. (1996) Multiple mechanisms and multiple herbicide resistance in Lolium rigidum. In: Molecular Genetics and Evolution of Pesticide Resistance. Ed. T. M. Brown, American Chemical Society Symposium Series 645. pp. 117-129.
Roush, R.T. and Powles, S. B. (1996) Pesticide Resistance: Why Be Concerned? In: Pesticide Resistance: Prevention and Management. Ed. G.W. Bourdot and D. M. Suckling. New Zealand Plant Protection Society. pp. 3-15.
Matthews, J.M., Powles, S.B. (1995) Glyphosate or glufosinate resistant transgenic crop and pasture species: Can target weeds develop resistance to these non-selective herbicides. In: Herbicide resistant crops and pastures in Australian farming systems. Ed. G.D.McLean & G. Evans, Bureau of Resource Sciences, Canberra. pp 253-257.
Hall, L.M., Holtum, J.A.M., Powles, S.B. (1994) Mechanisms responsible for cross resistance and multiple resistance. In: Herbicide Resistance in Plants: Biology and Biochemistry. Ed. S.B.Powles and J.A.M. Holtum, Lewis Press. pp. 243-261.
Tardif, F.J. and Powles, S.B. (1993) Target site-based resistance to herbicides inhibiting Acetyl-CoA carboxylase. Brighton Crop Prot. Conf. 5B-2, 533-540.
Powles, S.B. and Matthews, J.M. (1992) Multiple herbicide resistance in annual ryegrass (Lolium rigidum): A driving force for the adoption of integrated weed management strategies. In: Resistance 91: Achievements and Developments in Combating Pesticide Resistance. Elsevier Press. pp. 75-87.
Holtum, J.A.M., Powles, S.B. (1991) Annual ryegrass: An abundance of resistance. A plethora of mechanisms. Brighton Crop Prot. Conf. 8A-10, 1071-78.
Powles, S.B., Holtum, J.A.M., Matthews, J.M. and Liljegren, D.R. (1990) Herbicide cross resistance in annual ryegrass (Lolium rigidum): The search for a mechanism. In: ACS Symposium Series. Managing Resistance to Agrochemicals: Ed. M.B.Green, W.K.Moberg and H.M.LeBaron. American Chemical Society Press. pp. 394-406.
Stephen B Powles: Photoinhibition of Photosynthesis 1978-1991.
Preston, C., Holtum, J.A.M. Powles, S.B. (1991) Paraquat resistant plants are not more resistant to photoinhibition. Plant Physiology. 96: 314-318.
Ludlow, M.M., Powles, S.B. (1988). Effect of photoinhibition induced by water stress on growth and yield of grain sorghum. Aust. J. Plant Physiol. 15: 179-194.
Marot-Gaudry, J.F., Farineau, J., Lelandais, M., Moutot, F., Powles, S.B. and Cornic, G. (1986) Photoinhibition in leaves of Phaseolus vulgaris : metabolic approach. Physiologie Vegetale 24, 541-549.
Björkman, O., Powles, S.B., (1984) Inhibition of photosynthetic reactions under water stress: Interaction with light level. Planta 161, 490-504.
Powles, S.B., Cornic, G., Louason, G. (1984) Photoinhibition of photosynthesis induced by strong light in the absence of CO2: an appraisal of the hypothesis that photorespiration protects against photoinhibition. Physiologie Vegetale 22, 437-446.
Powles, S.B., Berry, J.A., Björkman, O. (1983) Interaction between light and temperature on the inhibition of photosynthesis in chilling-sensitive plants. Plant, Cell and Environment 6, 117-123.
Powles, S.B., Chapman, K.S.R., Whatley, F.R. (1982) Effect of photoinhibition treatments on subsequent activity of light-activated enzymes of C3 and C4 photosynthetic carbon metabolism. Plant Physiol. 69. 371-74.
Powles, S.B., Björkman, O. (1982) Photoinhibition of photosynthesis: Effect on chlorophyll fluorescence at 77 K in intact leaves and in chloroplast membranes of Nerium oleander. Planta 156, 97-107.
Powles, S.B., Thorne, S.W. (1981) Effect of high-light treatments in inducing photoinhibition of photosynthesis in intact leaves of low-light grown Phaseolus vulgaris and Lastreopsis microsora. Planta, 152, 471-77.
Fork, D., Oquist, G., Powles, S.B., (1981) Photoinhibition in Bean: A fluorescence analysis. Carnegie Yearbook, 80. 52-57.
Björkman, O., Powles, S.B. (1981) Leaf movement in the shade species Oxalis oregano. I. Response to light level and light quality. Carnegie Yearbook 80. 59-62.
Powles, S.B., Bjorkman, O. (1981) Leaf movement in the shade species Oxalis oregano. II.
Role in protection against injury by intense light. Carnegie Yearbook 80. 63-66.
Osmond, C.B., Winter, K., Powles, S.B., (1980) Adaptive significance of carbon dioxide cycling during photosynthesis in water-stressed plants. IN: Adaptation of Plants to Water and High Temperature Stress, N.C. Turner and P.J. Kramer (eds.). John Wiley and Sons, pp. 139-154.
Powles, S.B., Chapman, K.S.R., Osmond, C.B. (1980) Photoinhibition of intact attached leaves of C4 plants : dependence on CO2 and O2 partial pressures. Aust. J. Plant Physiol., 7, 737-47.
Powles, S.B., Critchley, C. (1980) Effect of light intensity during growth on photoinhibition of intact attached bean leaflets. Plant Physiol. 65: 1181-1187.
Powles, S.B., Osmond, C.B., Thorne, S.W. (1979) Photoinhibition of intact attached leaves of C3 plants illuminated in the absence of both CO2 and of photorespiration. Plant Physiol. 64, 982-88.
Powles, S.B., Osmond, C.B. (1978) Inhibition of the capacity and efficiency of photosynthesis in bean leaflets illuminated in a CO2 free atmosphere at low O2: a possible role for photorespiration. Aust. J. Plant Physiol. 5: 619-29.
1. Books:
2001 Herbicide Resistance and World Grains.
Editors: Stephen B Powles & Dale L Shaner
CRC Press. 2001.
1994 Herbicide Resistance in Plants: Biology & Biochemistry.
Editors: Stephen B. Powles & Joseph A.M. Holtum.
CRC Press. 1994.
2. Major Reviews:
Powles, S.B. (2008) Evolution in action: Glyphosate-resistant weeds threaten world crops. Outlooks on Pest Management, 19, 256-259.
Duke, S.O, Powles, S.B. (2008) Glyphosate: A once-in-a-century herbicide. Pest Management Science, 64, 319-325.
Powles, S.B. (2008) Evolved glyphosate-resistant weeds around the world: Lessons to be learnt. Pest Management Science, 64, 360-365.
Walsh, M.J., Powles, S.B. (2007) Management strategies for herbicide-resistant weed populations in Australian dryland crop-production systems. Weed Technology, 21, 332-338.
Powles, S.B. and C. Preston. (2006) Evolved glyphosate resistance in plants: Biochemical and genetic basis of resistance. Weed Technology, 20, 282-289.
Powles, S.B., Preston, C., Jutsum, A.R. and Bryan, I.B. (1997) Herbicide Resistance: Impact and Management. Advances in Agronomy. Vol. 58, 57-93.
Holt, J.S., Powles S.B. and Holtum, J.A.M. (1993) Mechanisms & agronomic aspects of herbicide resistance. Annual Review of Plant Biology. Vol. 44, 203-229.
Powles, S.B. (1984) Photoinhibition of photosynthesis induced by visible light. Annual Review of Plant Biology, Vol. 35, 15-44.
3. International Research Journals.
a) Effect of selection intensity on resistance evolution.
Busi, R., Yu, Q., Barrett-Lennard, R., Powles, S.B. (2008) Long distance pollen-mediated flow of herbicide resistance genes in Lolium rigidum. Theoretical & Applied Genetics, 117, 1281-1290.
Reboud, X., Majerus, N., Gasquez, J., Powles, S.B. (2007) Chlamydomonas reinhardtii as a model system for pro-active herbicide resistance evolution research. Biological Journal of the Linnean Society. 91, 257-266.
Neve, P., Powles, S.B. (2005) High survival frequencies at low herbicide use rates in populations of Lolium rigidum result in rapid evolution of herbicide resistance. Heredity, 95, 485-492.
Neve, P., Powles, S.B. (2005) Recurrent selection with reduced herbicide rates results in the rapid evolution of herbicide resistance in Lolium rigidum. Theoretical & Applied Genetics. 110, 1154-1166.
Preston, C., Powles, S.B. (2002) Evolution of herbicide resistance in weeds: Initial frequency of target site-based resistance to acetolactate synthase-inhibiting herbicides in Lolium rigidum. Heredity, 88, 8-13.
Rieger, M.A., Lamond, M., Preston, C., Powles, S.B., Roush, R.T. (2002) Pollen-mediated movement of herbicide resistance between commercial canola fields. Science. 296 (5577), 2386-2388.
Rieger, M.A., Potter, T.D., Preston, C., Powles, S.B. (2001) Hybridisation between Brassica napus L. and Raphanus raphanistrum L. under agronomic field conditions. Theoretical & Applied Genetics. 103, 555-560.
Rieger, M.A., Preston, C., Powles, S.B. (1999) Risks of gene flow from transgenic herbicide-resistant canola (Brassica napus) to weedy relatives in southern Australian cropping systems.
Aust. J. Agric. Res. 50, 115-128.
b) Evolved resistance to glyphosate.
Vila-Aiub, M.M., Balbi, M.C., Gundel, P.E., Ghersa, C.M., Powles, S.B. (2007) Evolution of glyphosate-resistant Johnson grass (Sorghum halepense) in glyphosate-resistant soybeans. Weed Science, 55, 566-571.
Yu, Q., Cairns, A., Powles, S.B. (2007) Glyphosate, paraquat and ACCase multiple herbicide resistance in a Lolium rigidum biotype. Planta, 225, 499-513.
Pedersen, B. P., Neve, P., Andreasen, C., Powles, S.B. (2007) Ecological fitness of a glyphosate resistant Lolium rigidum population: Growth and seed production along a competition gradient. Basic & Applied Ecology, 8, 258-268
Neve, P., Sadler, J., Powles, S.B. (2004). Multiple herbicide resistance in a glyphosate- resistant rigid ryegrass (Lolium rigidum) population. Weed Science 52: 920-928.
Neve, P., Diggle, A.J., Smith, F.P., Powles, S.B. (2003) Simulating evolution of glyphosate resistance in Lolium rigidum. I. Population biology of a rare resistance trait. Weed Research 43: 404-417.
Neve, P, Diggle, A.J., Smith, F.P., Powles, S.B. (2003) Simulating evolution of glyphosate resistance in Lolium rigidum. II. Past, present and future glyphosate use in Australian cropping. Weed Research 43: 418-427.
Powles, S.B. (2003) My View: Will glyphosate continue to aid world food production?
Weed Science, 51: 471.
Lorraine-Colwill, D.F., Powles, S.B., Hawkes, T.R., Hollinshead, P.H., Warner, S.A.J., Preston, C. (2003) Investigations into the mechanism of glyphosate resistance in Lolium rigidum. Pesticide Biochemistry and Physiology, 74, 62-72.
Lorraine-Colwill, D.F., Powles, S.B., Hawkes T.T., Preston, C. (2001) Inheritance of evolved glyphosate resistance in Lolium rigidum. Theoretical & Applied Genetics. 102, 545-550.
Lorraine-Colwill, DF., Hawkes, TR., Williams, PH., Warner, SJ., Sutton, PB., Powles, SB., Preston, C. (1999) Resistance to glyphosate in Lolium rigidum. Pesticide Science, 55, 486-503.
Powles, S.B., Lorraine-Colwill, D.F., Dellow, J.J., Preston, C. (1998) Evolved Resistance to glyphosate in rigid ryegrass (Lolium rigidum) in Australia. Weed Science. 46, 604-607.
c) Quantitative surveys of the geographic extent of herbicide resistance.
Owen, M.J., Powles, S.B. (2009) Distribution and frequency of herbicide-resistant wild oat (Avena spp.) across the Western Australian grain belt. Crop & Pasture Science, 60, 25-31.
Llewellyn, R.S., D’Emden, F.H., Owen, M.J., Powles, S.B. (2009) Herbicide resistance in rigid ryegrass (Lolium rigidum) has not led to higher weed densities in Western Australian cropping fields. Weed Science, 57, 61-65.
Walsh, M.J., Owen, M.J., Powles, S.B. (2007) Frequency and distribution of herbicide resistance in Raphanus raphanistrum populations randomly collected across the Western Australian wheatbelt. Weed Research, 47, 542-550.
Owen, M.J., Walsh, M.J, Llewellyn and Powles, S.B. (2007) Widespread occurrence of multiple herbicide resistance in Western Australian annual ryegrass (Lolium rigidum) populations. Australian J. Agricultural Research, 58, 711-718.
Llewellyn, R., Powles, S.B. (2001) High levels of herbicide resistance in rigid ryegrass (Lolium rigidum) in the wheatbelt of Western Australia. Weed Technology, 15, 242-248.
Walsh, M.J., Duane, R.D. and Powles, S.B. (2001) High frequency of chlorsulfuron resistant wild radish (Raphanus raphanistrum L.) populations across the Western Australian wheatbelt. Weed Technology. 15, 199-203.
d) Evolved resistance to acetyl coenzyme A carboxylase inhibiting herbicides.
Yu, Q., Collavo, A., Zheng, M.Q., Owen, M.J., Sattin, M., Powles, S.B. (2007) Diversity of acetyl-coenzyme A carboxylase mutations in resistant Lolium populations: Evaluation using clethodim. Plant Physiology, 145, 547-558.
Zhang, X., Powles, S.B. (2006b) Six amino acid substitutions in the carboxyl-transferase domain of the plastidic acetyl.CoA carboxylase gene are linked with resistance to herbicides in a Lolium rigidum population. New Phytologist, 172, 636-645.
Zhang, X, Powles, S.B. (2006a) The molecular basis for resistance to acetyl co-enzyme A carboxylase (ACCase) inhibiting herbicides in two target-based resistant biotypes of annual ryegrass (Lolium rigidum). Planta, 223, 550-557.
Delye, C., Zhang, X., Severine, M., Annick, M., Powles, S.B. (2005) Molecular bases for sensitivity to acetyl-coenzyme A carboxylase inhibitors in black-grass. Plant Physiology: 137, 794-806.
Maneechote, C., Samanwong, S., Zhang, X., Powles, S.B. (2005) Resistance to ACCase inhibiting herbicides in sprangletop (Leptochloa chinensis L.) Weed Science, 53, 290-295.
Delye, C., Zhang, X., Chalopin, C., Michel, S., Powles, S.B. (2003) An isoleucine residue within the carboxyl-transferase domain of multidomain acetyl-Coenzyme A carboxylase is a major determinant of sensitivity to aryloxyphenoxypropionate inhibitors but not to cyclohexanedione inhibitors. Plant Physiology. 132, 1716-1723
Matthews, N., Powles, S. B., Preston, C. (2000) Mechanisms of resistance to acetyl-coenzyme A carboxylase-inhibiting herbicides in a Hordeum leporinum population. Pest Management Science. 56:441-447.
Maneechote, C., Preston, C. Powles, S.B. (1997). A diclofop-methyl-resistant Avena sterilis biotype with a herbicide-resistance acetyl-coenzyme A carboxylase and enhanced metabolism of diclofop-methyl. Pestic. Sci. 49-105-114.
Tardif, F.J., Preston, C., Holtum, J.A.M., Powles, S.B. (1996) Resistance to acetyl-coenzyme A carboxylase inhibiting herbicides endowed by a single major gene encoding a resistant target site in a biotype of Lolium rigidum. Aust. J. Plant Physiol. 23: 15-23.
Maneechote, C. Holtum, J.A.M., Powles, S.B. (1994) Resistant acetyl-CoA carboxylase is a mechanism of herbicide resistance in a biotype of Avena sterilis ssp. ludoviciana. Plant & Cell Physiology, 35: 539-547.
Holtum, J.A.M., Hausler, R., Devine, M.D., Powles, S.B. (1994) Recovery of transmembrane potential in plants resistant to aryloxyphenoxypropanoate herbicides. A phenomenon awaiting explanation. Weed Science. 42: 293-301.
Tardif, F.J., Powles, S. B. (1994) Herbicide multiple-resistance in a Lolium rigidum biotype is endowed by multiple mechanisms: Isolation of a subset with resistant acetyl-CoA carboxylase. Physiol. Plantarum. 91: 488-494.
Tardif, F. J., Holtum, J.A.M., Powles, S.B. (1993) Occurrence of a herbicide resistant acetyl-co-enzyme A carboxylase mutant in annual ryegrass (Lolium rigidum) selected by sethoxydim. Planta. 190: 176-181.
Richter, J., Powles, S.B. (1993) Pollen expression of herbicide target site resistance genes in annual ryegrass (Lolium rigidum). Plant Physiology. 102: 1037-1041.
Barr, A.R., Mansooji, A.M., Holtum, J.A.M., Powles, S.B. (1992) The inheritance of herbicide resistance in Avena sterilis ssp. ludoviciana, biotype SAS1. Proc. 1st Int. Weed Control Congress. 70-72.
Mansooji, A.M., Holtum, J.A.M., Boutsalis, P., Matthews, J.M., Powles, S.B. (1992) Resistance to aryloxyphenoxypropionate herbicides in two wild oat species (Avena fatua and Avena sterilis ssp. ludoviciana). Weed Science. 40: 599-605.
Hausler, R.E., Holtum, J.A.M., Powles, S.B. (1991) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). IV. Correlation between membrane effects and resistance to graminicides. Plant Physiology. 97, 1035-43.
Holtum, J.A.M., Matthews, J.M., Liljegren, D.R., Powles, S.B. (1991) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). III. On the mechanism of resistance to diclofop-methyl. Plant Physiology. 97, 1026-34.
Matthews, J.M., Holtum, J.A.M., Liljegren, D.R., Furness, B., Powles, S.B. (1990) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). 1. Properties of the herbicide target enzymes acetyl-CoA carboxylase (ACC) and acetolactate synthase (ALS). Plant Physiology. 94. 1180-1186.
e) Evolved resistance to acetolactate synthase (ALS) inhibiting herbicides.
Yu, Q., Han, H., Powles, S.B. (2008) Mutations of the ALS gene endowing resistance to ALS-inhibiting herbicides in Lolium rigidum populations. Pest Management Science, 64, 1229-1236.
Yu, Q., Nelson, J., Jackson, M., Powles S.B. (2007) Molecular characterisation of resistance to ALS-inhibiting herbicides in Hordeum leporinum biotypes. Pest Management Science, 63, 918-927.
Yu, Q,. Zhang, X Q., Hashem, A., Walsh, M.J., Powles, S.B. (2003) ALS gene proline (197) mutations confer ALS herbicide resistance in eight separated wild radish (Raphanus raphanistrum) populations. Weed Science. 51, 831-838.
Boutsalis, P., Karotam, J., Powles, S.B. (1999) Molecular basis of resistance to acetolactate synthase-inhibiting herbicides in Sisymbrium orientale and Brassica tournefortii. Pesticide Science. 55, 507-516.
Boutsalis, P., Powles, S.B. (1998) Seedbank characteristics of ALS herbicide-resistant and susceptible Sisymbrium orientale. Weed Research. 38. 389-393.
Boutsalis, P., Powles, S.B. (1995) Inheritance and mechanism of resistance to herbicides inhibiting acetolactate synthase in Sonchus oleraceus L. Theoretical & Applied Genetics, 91: 242-247.
Boutsalis, P., Powles, S.B. (1995) Resistance of dicot weeds to acetolactate synthase (ALS) inhibiting herbicides in Australia. Weed Research. 39. 149-155.
Burnet, M. W.M., Christopher, J.T., Holtum, J. A. M., Powles, S. B. (1994) Identification of two mechanisms of resistance to sulfonylurea herbicides within one population of rigid ryegrass (Lolium rigidum) using a selective germination medium. Weed Science. 42: 468-473.
Christopher, J.T., Powles, S.B., Holtum, J.A.M. (1992) Resistance to acetolactate synthase inhibiting herbicides in annual ryegrass (Lolium rigidum) involves at least two mechanisms. Plant Physiology. 100, 1909-1913.
Christopher, J.T., Powles, S.B., Holtum, J.A.M., Liljegren, D.R. (1991) Cross-resistance to herbicides in annual ryegrass (Lolium rigidum). II. Chlorsulfuron resistance involves a wheat-like detoxification system. Plant Physiology, 95, 1036-45.
f) Cytochrome P450 enzyme endowed non-target-site based resistance.
Vila-Aiub, M.M., Neve, P., Powles, S.B. (2005) Resistance cost of a cytochrome P450 herbicide metabolism resistance mechanism but not an ACCase target site mutation in a multiple resistant Lolium rigidum population. New Phytologist, 167, 787-796.
Vila-Aiub, M.M., Neve, P., Steadman, K.J., Powles, S.B. (2005) Ecological fitness of a multiple herbicide resistant Lolium rigidum population: Dynamics of seed germination and seedling emergence of target-site versus metabolism-based resistant and susceptible phenotypes. Journal of Applied Ecology, 42, 288-298.
Tardif, F.J., Powles, S.B. (1999) Effect of malathion on resistance to soil-applied herbicides in a population of rigid ryegrass (Lolium rigidum). Weed Science, 47, 258-261
Preston, C, Powles, S.B. (1998) Amitrole inhibits diclofop metabolism and synergises diclofop-methyl in a diclofop-methyl-resistant biotype of Lolium rigidum. Pest. Biochem. Physiol. 62, 179-189.
Preston, C., Powles, S.B. (1997) Light-dependent enhanced metabolism of chlorotoluron in a substituted urea herbicide-resistant biotype of Lolium rigidum Gaud.. Planta 201: 202-208.
Hall, L.M., Moss, S.R., Powles, S. B. (1997) Mechanisms of resistance to aryloxyphenoxypropionate herbicides in two resistant biotypes of Alopecurus myosuroides (blackgrass): Herbicide metabolism as a cross-resistance mechanism. Pest. Biochem. Physiol. 57: 87-98.
Helvig, C., Tardif, F.J., Seyer, A., Powles, S.B., Mioskowski, C., Durst, F., Salaun, J.P. (1996). Selective inhibition of a cytochrome P450 enzyme in wheat that oxidises both the natural substrate lauric acid and the synthetic herbicide diclofop. Pest. Biochem. Physiol. 54:
Preston, C., Tardif, F.J., Christopher, J.T., Powles, S.B. (1996) Multiple resistance to dissimilar herbicide chemistries in a biotype of Lolium rigidum due to enhanced activity of several herbicide degrading enzymes. Pest. Biochem. Physiol. 54: 123-134.
Hall, L.M., Moss, S.R., Powles, S.B. (1995) Mechanism of resistance to chlorotoluron in two biotypes of the grass weed Alopecurus myosuroides. Pest. Biochem. Physiol. 53: 180-182.
Christopher, J.T., Preston, C., Powles, S.B. (1994) Malathion antagonizes metabolism-based chlorsulfuron resistance in Lolium rigidum. Pest. Biochem. & Physiol. 49: 172-182.
Burnet, M.W.M., Loveys, B.R., Holtum, J.A.M., Powles, S.B. (1993) A mechanism of chlortoluron resistance in Lolium rigidum. Planta. 190: 182-189.
Burnet, M.W.M., Loveys, B.R., Holtum, J.A.M., Powles, S.B. (1993) Increased detoxification is a mechanism of simazine resistance in Lolium rigidum. Pest Biochem & Physiol.46: 207-218.
Burnet, M.W., Hildebrand, O.B., Holtum, J.A.M., Powles, S.B. (1991) Amitrole, triazine, substituted urea and metribuzin resistance in a biotype of rigid ryegrass (Lolium rigidum). Weed Science, 39: 317-323.
g) Resistant plants displaying multiple herbicide resistance mechanisms.
Yu, Q., Friesen, S., Zhang, X., Powles, S.B. (2004) Tolerance to acetolactate synthase and acetyl-coenzyme A carboxylase inhibiting herbicides in Vulpia bromoides is conferred by two co-existing resistance mechanisms. Pesticide Biochemistry and Physiology, 78, 21-30.
Walsh, M.J., Powles, S.B., Beard, B., Parkin, B.T., Porter, S. (2004) Multiple herbicide resistance across four modes of action in wild radish (Raphanus raphanistrum L.) Weed Science. 52: 8-13.
Burnet, M. W.M., Holtum, J. A. M., Powles, S. B. (1994) Resistance to nine herbicide classes in a population of rigid ryegrass (Lolium rigidum). Weed Science. 42: 369-377.
McAlister, F.M., Powles, S.B., Holtum, J.A.M. (1995) Dinitroaniline herbicide resistance in rigid ryegrass (Lolium rigidum). Weed Science. 43: 55-62.
Burnet, M.W.M., Barr, A., Powles, S. B. (1994) Chloroacetamide resistance in rigid ryegrass (Lolium rigidum). Weed Science. 42: 153-157.
h) Evolved resistance to paraquat.
Yu, Q., Han, H., Nguyen L., Forster, J.W., Powles, S.B. (2009) Paraquat resistance in a Lolium rigidum population is governed by one major nuclear gene. Theoretical & Applied Genetics, 118, 1601-1608.
Preston, C., Soar, C.J., Hidayat, I., Greenfield, K. M., Powles, S.B. (2005) Differential translocation of paraquat in paraquat-resistant populations of Hordeum leporinum. Weed Research, 45, 289-295.
Soar, C.J., Karotam, J., Preston, C., Powles, S.B. (2004) Polyamines can inhibit paraquat toxicity and translocation in the broadleaf weed Arctotheca calendula. Pesticide Biochemistry and Physiology, 80: 94-105.
Yu, Q., Cairns, A., Powles, S.B. (2004) Paraquat resistance in a population of Lolium rigidum. Functional Plant Biology. 31: 247-254.
Soar, C.J., Karotam, J., Preston, C., Powles, S.B. (2003) Reduced paraquat translocation in paraquat resistant Arctotheca calendula (L.) Levyns is a consequence of the primary resistance mechanism not the cause. Pesticide Biochemistry & Physiology, 76, 91-98.
Alizadeh, H.M, Preston, C., Powles, S.B. (1998) Paraquat resistant biotypes of Hordeum glaucum from zero tillage wheat. Weed Research. 38, 139-142.
Purba, E., Preston, C., Powles, S.B. (1996) Growth and competitiveness of paraquat-resistant and susceptible biotypes of Hordeum leporinum Link. Weed Research. 36: 311-317.
Purba, E., Preston, C., Powles, S. B. (1995) The mechanism of resistance to paraquat is strongly temperature dependent in resistant Hordeum leporinum and Hordeum glaucum. Planta. 196: 464-468.
Preston. C., Balachandran, S., Powles, S. B. (1994) Investigations of mechanisms of resistance to bipyridyl herbicides in Arctotheca calendula (L) Levyns. Plant Cell & Env. 17: 1113-1123.
Purba, E., Preston, C., Powles, S.B. (1993) Paraquat resistance in a biotype of Vulpia bromoides (L) S.F. Gray. Weed Research. 33, 409-413.
Purba, E., Preston, C., Powles, S.B. (1993) Inheritance of bipyridyl herbicide resistance in Arctotheca calendula and Hordeum leporinum. Theoretical & Applied Genetics.87, 598-602
Preston, C., Holtum, J.A.M., Powles, S.B. (1992) On the mechanism of resistance to paraquat in Hordeum glaucum and H. leporinum. Delayed inhibition of photosynthetic O2 evolution after paraquat application. Plant Physiol. 100, 630-636.
Powles, S.B., Tucker, E.S., Morgan, T.W. (1992) Eradication of paraquat-resistant Hordeum glaucum Steud. by prevention of seed production for 3 years. Weed Research. 32: 207-211.
Preston, C., Holtum, J.A.M. Powles, S.B. (1991) Paraquat resistant plants are not more resistant to photoinhibition. Plant Physiology. 96: 314-318.
Tucker, E.S., Powles, S.B. (1991) A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat. Weed Science. 39: 159-162.
Islam, A.K.M.R., Powles, S.B. (1991) Attempts to transfer paraquat resistance from barley grass (Hordeum glaucum Steud) to barley and wheat. Weed Research. 31: 395-399.
Powles, S.B., Tucker, E.S., Morgan, T.W. (1989). A capeweed (Arctotheca calendula) biotype in Australia resistant to bipyridyl herbicides. Weed Science 37: 60-62.
Islam, A.K.M.R., Powles, S.B. (1988). Inheritance of resistance to paraquat in barley grass (Hordeum glaucum Steud). Weed Research 28: 393-397.
Tucker, E.S., Powles, S.B. (1988). The occurrence and distribution in south-eastern Australia of barley grass (Hordeum glaucum) resistant to paraquat. Plant Protection Quarterly. 3: 19-21.
Powles, S.B., Cornic, G. (1987) Mechanism of paraquat resistance in Hordeum glaucum. I. Studies with isolated organelles and enzymes. Aust. J. Plant Physiol. 14, 81-89.
Bishop, T.W., Powles, S.B., Cornic, G. (1987). Mechanism of paraquat resistance in Hordeum glaucum II. Paraquat uptake and translocation. Aust. J. Plant Physiol. 14: 539-547.
Powles, S.B. (1986) The appearance of a biotype of the weed, Hordeum glaucum, resistant to the herbicide paraquat. Weed Research 26, 167-172.
i) Target site resistance to photosystem two photosynthetic herbicides
Friesen, L.J., Powles, S.B. (2007) Physiological and molecular characterization of atrazine resistance in a wild radish population (Raphanus raphanistrum). Weed Technology, 21, 910-914.
Hashem, A., Dhammu, H.S., Powles, S.B., Bowran, D.G., Piper, T.J., Cheam, A.H. (2001) Triazine resistance in a biotype of wild radish (Raphanus raphanistrum) in Australia. Weed Technology. 15, 636-641
j) Simulation & bio-economic modelling of resistance and management.
Monjardino, M., Pannell, D.J., Powles, S.B. (2005) The economic value of glyphosate-resistant canola in the management of two widespread crop weeds in a Western Australian farming system. Agricultural Systems, 84, 297-315.
Monjardino, M., Pannell, D.J., Powles, S.B. (2004) The economic value of haying and green manuring in the integrated management of annual ryegrass and wild radish in a Western Australian farming system. Australian Journal of Experimental Agriculture. 44, 1195-1203.
Monjardino, M., Pannell, D.J., Powles, S.B. (2004) The economic value of pasture phases in the integrated management of annual ryegrass and wild radish in a Western Australian farming system. Australian Journal of Experimental Agriculture. 44, 265-271.
Pannell, D.J., Stewart, V., Monjardino, M., Bennett, A., Schmidt, C., Powles, S.B. (2004) RIM: a bioeconomic model for integrated weed management of Lolium rigidum in Western Australia. Agricultural Systems. 79, 305-325.
Monjardino, M., Pannell, D.J., Powles, S.B. (2003) Multi-species resistance and integrated management: A bio-economic model for integrated management of rigid ryegrass (Lolium rigidum) and wild radish (Raphanus raphanistrum). Weed Science, 51, 798-809.
k) Agronomic & economic management of resistance.
Borger, C.P.D., Yan, G., Scott, J.K., Walsh, M.J., Powles, S.B. (2008) Salsola tragus or S. australis (Chenopodiaceae) in Australia – untangling taxonomic confusion through molecular and cytological analyses. Australian Journal of Botany, 56, 600-608.
Walsh, M.J., Wilson, B.L., Powles, S.B. (2007) Residual activity of three herbicides following exposure to summer-autumn conditions on the surface of three Western Australian wheatbelt soils. Plant Protection Quarterly, 22, 113-120.
Borger CPD, Walsh, M, Scott, JK, Powles SB. (2007) Tumbleweeds in the Western Australian cropping system: seed dispersal characteristics of Salsola australis. Weed Research, 47, 406-414.
Llewellyn, R.S., Lindner, R.K., Pannell, D.J., Powles, S.B. (2007) Herbicide resistance and the adoption of integrated weed management by Western Australian grain growers. Agricultural Economics, 36, 121-128.
Steadman, K.J., Eaton, D.M., Plummer, J.A., Ferris, D.G., Powles, S.B. (2006) Late season non-selective herbicide application reduces Lolium rigidum seed numbers, seed viability and seedling fitness. Australian Journal of Agricultural Research, 57, 133-141.
Llewellyn, R.S., Pannell, D.J., Lindner, R.K., Powles, S.B. (2005) Targeting key perceptions when planning and evaluating extension. Australian Journal of Experimental Agriculture, 45, 1627-1633.
Walsh, M.J., Minkey, D.M., Powles, S.B. (2005) Field evaluation of preseason applications of residual herbicides to control annual ryegrass (Lolium rigidum). Plant Protection Quarterly. 20, 133-139.
Llewellyn R.S., Lindner, R., Pannell, D.J. Powles, S.B. (2004) Grain grower perceptions and use of integrated weed management. Australian Journal of Experimental Agriculture, 44, 993-1001.
Walsh, M.J., Devlin, R., Powles, S.B. (2004) Potential for preseason herbicide application to prevent weed emergence in the subsequent growing season. 1. Identification and evaluation of possible herbicides. Weed Technology, 18, 228-235.
Lllewellyn, R.S., Lindner, R.K., Pannell, D.J, Powles, S.B. (2002) Resistance and the herbicide resource: Perceptions of Western Australian grain growers. Crop Protection. 21, 1067-1075.
Llewellyn, R.S., Lindner, R.K., Pannell, D.J., Powles, S.B. (2001) Herbicide resistance and the decision to conserve the herbicide resource: review and framework. Australian Agribusiness Review 9.
Powles, S.B. (1997) Success from adversity: Herbicide resistance can drive changes to sustainable weed management systems. Brighton Crop Protection Conf 10B-1. 1119-1126.
Powles, S.B., Matthews, J.M. (1996) Integrated weed management for the control of herbicide resistant annual ryegrass (Lolium rigidum). Second International Weed Control Congress. Copenhagen. 407-413.
Nietschke, B.S., Reeves, T.G., Matthews, J.M., Powles, S.B. (1996) Components of an integrated weed management strategy to control herbicide-resistant Avena spp.-An Australian perspective. Second International Weed Control Congress. Copenhagen. 493-498.
Matthews, J.M., Powles, S.B. (1995) Managing herbicide resistant annual ryegrass: Southern Australian research. Eleventh Australian Weeds Conference. 537-541.
Powles, S.B., Charman, N., Poole, F. (1988) Solar heating (solarization) of the soil surface: Effect on weed control and yield of Phaseolus vulgaris. Plant Protection Quarterly. 3: 31-35.
l) Molecular basis of Lolium seed dormancy.
Goggin, D.E., Steadman, K.J., Powles, S.B. (2008) Green and blue light photoreceptors are involved in maintenance of dormancy in imbibed annual ryegrass (Lolium rigidum) seeds. New Phytologist, 180, 81-89.
m) Enhanced herbicide bio-degradation in soil.
Hole, SJW., McClure, NC., Powles, SB. (2001) Persistence and management of enhanced bio degradation in soil. Weed Research, 41, 341-349.
Hole, SJW., McClure, NC., Powles, SB. (2001) Rapid degradation of carbetamide upon repeated application to Australian soils. Soil Biology & Biochemistry, 33, 739-745.
Hole, S.J.W., Powles S.B. (1997) Reduced efficacy and enhanced degradation of carbetamide after repeated application in Australia. Weed Research 37, 165-170.
4. Book Chapters:
Vila-Aiub, M.M., Neve, P., Powles, S.B. (2005). Fitness costs of evolved herbicide resistance. In: Encyclopaedia of Pest Management. Ed. D. Pimmental. Marcel Dekker Publishers. NY. USA. pp.1-3.
Preston, C. and Powles, S.B. (2002) Mechanisms of multiple herbicide resistance in Lolium rigidum. In: Agrochemical Resistance: Extent, Mechanism & Detection. Eds. J.M. Clark & I. Yamaguchi, Oxford University Press. pp. 150-160.
Powles, S.B. and Bowran. D.G. (2000) Crop Weed Management Systems. In: Australian Weed Management Systems. Ed. B. Sindel. Publishers: R.G. & F.J. Richardson. pp. 287-306.
Rieger, M.A., Preston, C., Potter, T., Powles, S.B. (1999) Gene flow from transgenic canola to wild radish – a model system to determine the risks. In: Lutman, P.J.W. (Ed) Gene Flow and Agriculture: Relevance for Transgenic Crops. British Crop Protection Council, pp. 131-136
Powles, S.B. and Preston, C. (1999) Herbicide Resistance: A case of rapid evolution. In: Plants in Action: Adaptation in Nature, Performance in Cultivation. Ed. B. Atwell, P. Kriedemann and C. Turnbull. Pub: Macmillan Education Australia. pp. 607-613.
Tardif, F.J., Preston, C., Powles, S.B. (1997) Mechanisms of herbicide multiple resistance in Lolium rigidum. In: Weed and Crop Resistance to Herbicides. Ed. R. DePrado, J. Jorrin & L. Garcia-Torres. Kluwer Academic Publishers. pp.117-124.
Bowran, D.G., Hamblin, J., Powles, S.B. (1997) Incorporation of transgenic herbicide resistant crops into integrated weed management systems. In: Commercialisation of Transgenic Crops: Risk, Benefit and Trade Considerations. Ed. G.D. McLean, P.M.Waterhouse, G.Evans & M.J.Gibbs. D.P.I.E. Canberra, pp 301-312
Preston, C, Tardif, F.J., Powles, S.B. (1996) Multiple mechanisms and multiple herbicide resistance in Lolium rigidum. In: Molecular Genetics and Evolution of Pesticide Resistance. Ed. T. M. Brown, American Chemical Society Symposium Series 645. pp. 117-129.
Roush, R.T. and Powles, S. B. (1996) Pesticide Resistance: Why Be Concerned? In: Pesticide Resistance: Prevention and Management. Ed. G.W. Bourdot and D. M. Suckling. New Zealand Plant Protection Society. pp. 3-15.
Matthews, J.M., Powles, S.B. (1995) Glyphosate or glufosinate resistant transgenic crop and pasture species: Can target weeds develop resistance to these non-selective herbicides. In: Herbicide resistant crops and pastures in Australian farming systems. Ed. G.D.McLean & G. Evans, Bureau of Resource Sciences, Canberra. pp 253-257.
Hall, L.M., Holtum, J.A.M., Powles, S.B. (1994) Mechanisms responsible for cross resistance and multiple resistance. In: Herbicide Resistance in Plants: Biology and Biochemistry. Ed. S.B.Powles and J.A.M. Holtum, Lewis Press. pp. 243-261.
Tardif, F.J. and Powles, S.B. (1993) Target site-based resistance to herbicides inhibiting Acetyl-CoA carboxylase. Brighton Crop Prot. Conf. 5B-2, 533-540.
Powles, S.B. and Matthews, J.M. (1992) Multiple herbicide resistance in annual ryegrass (Lolium rigidum): A driving force for the adoption of integrated weed management strategies. In: Resistance 91: Achievements and Developments in Combating Pesticide Resistance. Elsevier Press. pp. 75-87.
Holtum, J.A.M., Powles, S.B. (1991) Annual ryegrass: An abundance of resistance. A plethora of mechanisms. Brighton Crop Prot. Conf. 8A-10, 1071-78.
Powles, S.B., Holtum, J.A.M., Matthews, J.M. and Liljegren, D.R. (1990) Herbicide cross resistance in annual ryegrass (Lolium rigidum): The search for a mechanism. In: ACS Symposium Series. Managing Resistance to Agrochemicals: Ed. M.B.Green, W.K.Moberg and H.M.LeBaron. American Chemical Society Press. pp. 394-406.
Stephen B Powles: Photoinhibition of Photosynthesis 1978-1991.
Preston, C., Holtum, J.A.M. Powles, S.B. (1991) Paraquat resistant plants are not more resistant to photoinhibition. Plant Physiology. 96: 314-318.
Ludlow, M.M., Powles, S.B. (1988). Effect of photoinhibition induced by water stress on growth and yield of grain sorghum. Aust. J. Plant Physiol. 15: 179-194.
Marot-Gaudry, J.F., Farineau, J., Lelandais, M., Moutot, F., Powles, S.B. and Cornic, G. (1986) Photoinhibition in leaves of Phaseolus vulgaris : metabolic approach. Physiologie Vegetale 24, 541-549.
Björkman, O., Powles, S.B., (1984) Inhibition of photosynthetic reactions under water stress: Interaction with light level. Planta 161, 490-504.
Powles, S.B., Cornic, G., Louason, G. (1984) Photoinhibition of photosynthesis induced by strong light in the absence of CO2: an appraisal of the hypothesis that photorespiration protects against photoinhibition. Physiologie Vegetale 22, 437-446.
Powles, S.B., Berry, J.A., Björkman, O. (1983) Interaction between light and temperature on the inhibition of photosynthesis in chilling-sensitive plants. Plant, Cell and Environment 6, 117-123.
Powles, S.B., Chapman, K.S.R., Whatley, F.R. (1982) Effect of photoinhibition treatments on subsequent activity of light-activated enzymes of C3 and C4 photosynthetic carbon metabolism. Plant Physiol. 69. 371-74.
Powles, S.B., Björkman, O. (1982) Photoinhibition of photosynthesis: Effect on chlorophyll fluorescence at 77 K in intact leaves and in chloroplast membranes of Nerium oleander. Planta 156, 97-107.
Powles, S.B., Thorne, S.W. (1981) Effect of high-light treatments in inducing photoinhibition of photosynthesis in intact leaves of low-light grown Phaseolus vulgaris and Lastreopsis microsora. Planta, 152, 471-77.
Fork, D., Oquist, G., Powles, S.B., (1981) Photoinhibition in Bean: A fluorescence analysis. Carnegie Yearbook, 80. 52-57.
Björkman, O., Powles, S.B. (1981) Leaf movement in the shade species Oxalis oregano. I. Response to light level and light quality. Carnegie Yearbook 80. 59-62.
Powles, S.B., Bjorkman, O. (1981) Leaf movement in the shade species Oxalis oregano. II.
Role in protection against injury by intense light. Carnegie Yearbook 80. 63-66.
Osmond, C.B., Winter, K., Powles, S.B., (1980) Adaptive significance of carbon dioxide cycling during photosynthesis in water-stressed plants. IN: Adaptation of Plants to Water and High Temperature Stress, N.C. Turner and P.J. Kramer (eds.). John Wiley and Sons, pp. 139-154.
Powles, S.B., Chapman, K.S.R., Osmond, C.B. (1980) Photoinhibition of intact attached leaves of C4 plants : dependence on CO2 and O2 partial pressures. Aust. J. Plant Physiol., 7, 737-47.
Powles, S.B., Critchley, C. (1980) Effect of light intensity during growth on photoinhibition of intact attached bean leaflets. Plant Physiol. 65: 1181-1187.
Powles, S.B., Osmond, C.B., Thorne, S.W. (1979) Photoinhibition of intact attached leaves of C3 plants illuminated in the absence of both CO2 and of photorespiration. Plant Physiol. 64, 982-88.
Powles, S.B., Osmond, C.B. (1978) Inhibition of the capacity and efficiency of photosynthesis in bean leaflets illuminated in a CO2 free atmosphere at low O2: a possible role for photorespiration. Aust. J. Plant Physiol. 5: 619-29.
Roles, responsibilities and expertise
Major world grain crops.
Funding received
Major funding from the Grains Research & Development Corporation. Funding from Australian Research Council Linkage Grants and Australian Weeds Research Centre
Industrial relevance
High relevance to the Australian grains industry. High relevance to agrichemical corporations.
Languages
English and French
Memberships
Australian Academy of Technological Sciences & Engineering.
Australian Society of Plant Biology.
Weed Science Society of America.
European Weed Research Society.
Australian Society of Antimicrobials.
Australian Society of Plant Biology.
Weed Science Society of America.
European Weed Research Society.
Australian Society of Antimicrobials.
Honours and awards
current ISI Highly Cited (top 0.5% cited plant scientists worldwide)
Institute of Scientific Information, (isihighlycited.com) USA
2009 OECD Fellowship, France
2007 WSSA Award for Outstanding Paper in Weed Technology (USA)
2001 Centenary Medal – Federation of Australia
1999 Fellow- Australian Academy Technological Sciences & Engineering
1997 Honorary International Fellow-WSSA (USA)
1993 CAWSS Medal for Research Excellence (Australia)
1980 CSIRO Overseas Postdoctoral Fellowship (USA)
1975 Rotary International Ambassadorial Fellowship (USA)
Institute of Scientific Information, (isihighlycited.com) USA
2009 OECD Fellowship, France
2007 WSSA Award for Outstanding Paper in Weed Technology (USA)
2001 Centenary Medal – Federation of Australia
1999 Fellow- Australian Academy Technological Sciences & Engineering
1997 Honorary International Fellow-WSSA (USA)
1993 CAWSS Medal for Research Excellence (Australia)
1980 CSIRO Overseas Postdoctoral Fellowship (USA)
1975 Rotary International Ambassadorial Fellowship (USA)
Previous positions
Director, Australian Weed Management CRC. Adelaide.
Teaching
Integrated Pest Management
Current external positions
Chair, Genetic Technologies Technical Advisory Committee (GTTAC). Office of Gene Technology Regulator. Canberra.
Useful links
wahri.agric.uwa.edu.au
New and noteworthy
Currently in Dijon, France working on a major herbicide resistance review paper. Returning mid September.
Current projects
GRDC – WA Herbicide resistance initiative
GRDC – Harrington Seed Destructor evaluation
GRDC – Gene flow in GM canola
ARC Discovery – Lolium dormancy biochemistry
ARC Linkage (VABC) – Lolium resistance genomics
ARC Linkage (Kings Park) – Karrikinolide potential in agriculture.
ARC Linkage (Kumiai Japan )– Pyroxasulfone resistance evolution.
Federal Govt DAFF – Australian weeds research centre grants
GRDC – Harrington Seed Destructor evaluation
GRDC – Gene flow in GM canola
ARC Discovery – Lolium dormancy biochemistry
ARC Linkage (VABC) – Lolium resistance genomics
ARC Linkage (Kings Park) – Karrikinolide potential in agriculture.
ARC Linkage (Kumiai Japan )– Pyroxasulfone resistance evolution.
Federal Govt DAFF – Australian weeds research centre grants
Research profile
