An aspartate to glycine change in the carboxyl transferase domain of acetyl CoA carboxylase and non-target-site mechanism(s) confer resistance to ACCase inhibitor herbicides in a Lolium multiflorum population

Pest Management Science
Shiv S Kaundun

Abstract

The increasing use of ACCase-inhibiting herbicides has resulted in evolved resistance in key grass weeds infesting cereal cropping systems worldwide. Here, a thorough and systematic approach is proposed to elucidate the basis of resistance to three ACCase herbicides in a Lolium multiflorum Lam. (Italian rye grass) population from the United Kingdom (UK24). Resistance to sethoxydim and pinoxaden was always associated with a dominant D2078G (Alopecurus myosuroides Huds. equivalent) target-site mutation in UK24. Conversely, whole-plant herbicide assays on predetermined ACCase genotypes showed very high levels of resistance to diclofop-methyl for all three wild DD2078 and mutant DG2078 and GG2078 ACCase genotypes from the mixed resistant population UK24. This indicates the presence of other diclofop-methyl-specific resistance mechanism(s) yet to be determined in this population. The D2078G mutation could be detected using an unambiguous DNA-based dCAPS procedure that proved very transferable to A. myosuroides, Avena fatua L., Setaria viridis (L.) Beauv. and Phalaris minor Retz. This study provides further understanding of the molecular basis of resistance to ACCase inhibitor herbicides in a Lolium population and a widely applicable...Continue Reading

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Citations

Aug 8, 2012·Cellular and Molecular Life Sciences : CMLS·Liang Tong
Jun 7, 2011·Journal of Agricultural and Food Chemistry·Hugo Cruz-HipolitoRafael De Prado
Dec 8, 2010·Proceedings of the National Academy of Sciences of the United States of America·Linda P C YuLiang Tong
Mar 3, 2010·Annual Review of Plant Biology·Stephen B Powles, Qin Yu
May 20, 2015·Pest Management Science·Roberto BusiStephen B Powles
Apr 5, 2014·Pest Management Science·Shiv S Kaundun
Aug 26, 2014·Pesticide Biochemistry and Physiology·Hongle XuLiyao Dong
Aug 13, 2015·Pesticide Biochemistry and Physiology·Aristeidis P PapapanagiotouIlias G Eleftherohorinos
Oct 18, 2019·Plants·Mithila Jugulam, Chandrima Shyam

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