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

Autor(es)

Vazquez-Garcia, Jose G. ^[1] ; Alcantara-de la Cruz, Ricardo ^[2] ; Rojano-Delgado, Antonia M. ^[1] ; Palma-Bautista, Candelario ^[1] ; de Portugal Vasconcelos, Joao M. ^{[3, 4]} ; De Prado, Rafael ^[1]

Afiliação do(s) autor(es)

^[1] Univ Cordoba, Dept Agr Chem & Edaphol, Cordoba 14071 - Spain

^[2] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos - Brazil

^[3] Polytech Inst Beja, Biosci Dept, P-7800295 Beja - Portugal

^[4] Polytech Inst Portalegre, VALORIZA Res Ctr Endogenous Resource Valorizat, P-7300555 Portalegre - Portugal

• Tipo de documento: Artigo Científico
• Fonte: Journal of Agricultural and Food Chemistry; v. 69, n. 4, p. 1197-1205, FEB 3 2021.
• Citações Web of Science: 0

Resumo

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 C-14-diclofop-methyl(14)C-imazamox and C-14-glyphosate of the R-15 population were similar to those of a susceptible (S-15) population; however, the R-15 population translocated similar to 38% less C-14-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. (AU)

• Processo FAPESP: 18/15910-6 - Controle biorracional de inseto pragas e fitopatógenos
• Beneficiário: Ricardo Alcántara de la Cruz
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado