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Multiple Herbicide Resistance Evolution: The Case of Eleusine indica in Brazil.

Authors :
Vázquez-García JG
Alcántara-de la Cruz R
Rojano-Delgado AM
Palma-Bautista C
de Portugal Vasconcelos JM
De Prado R
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.

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