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Multiple Herbicide Resistance Evolution: The Case of Eleusine indica in Brazil.
- Source :
-
Journal of agricultural and food chemistry [J Agric Food Chem] 2021 Feb 03; Vol. 69 (4), pp. 1197-1205. Date of Electronic Publication: 2021 Jan 20. - Publication Year :
- 2021
-
Abstract
- The occurrence of multiple herbicide resistant weeds has increased considerably in glyphosate-resistant soybean fields in Brazil; however, the mechanisms governing this resistance have not been studied. In its study, the target-site and nontarget-site mechanisms were characterized in an Eleusine indica population (R-15) with multiple resistance to the acetyl-CoA carboxylase (ACCase) inhibitors, glyphosate, imazamox, and paraquat. Absorption and translocation rates of <superscript>14</superscript> C-diclofop-methyl <superscript>14</superscript> C-imazamox and <superscript>14</superscript> C-glyphosate of the R-15 population were similar to those of a susceptible (S-15) population; however, the R-15 population translocated ∼38% less <superscript>14</superscript> C-paraquat to the rest of plant and roots than the S-15 population. Furthermore, the R-15 plants metabolized (by P450 cytochrome) 55% and 88% more diclofop-methyl (conjugate) and imazamox (imazamox-OH and conjugate), respectively, than the S-15 plants. In addition, the Pro-106-Ser mutation was found in the EPSPS gene of this population. This report describes the first characterization of the resistance mechanisms in a multiple herbicide resistant weed from Brazil.
- Subjects :
- Acetyl-CoA Carboxylase antagonists & inhibitors
Acetyl-CoA Carboxylase genetics
Acetyl-CoA Carboxylase metabolism
Brazil
Eleusine enzymology
Eleusine genetics
Enzyme Inhibitors pharmacology
Glycine pharmacology
Imidazoles pharmacology
Paraquat pharmacology
Plant Proteins antagonists & inhibitors
Plant Proteins genetics
Plant Proteins metabolism
Glyphosate
Eleusine drug effects
Glycine analogs & derivatives
Herbicide Resistance
Herbicides pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1520-5118
- Volume :
- 69
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Journal of agricultural and food chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 33470815
- Full Text :
- https://doi.org/10.1021/acs.jafc.0c03999