Reduced absorption and impaired translocation endows glyphosate resistance in Amaranthus palmeri harvested in GR soybean from Argentina

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dc.contributor.authorPalma-Bautista, Candelario
dc.contributor.authorTorra Farré, Joel
dc.contributor.authorGarcía, María J.
dc.contributor.authorBracamonte, Enzo
dc.contributor.authorRojano-Delgado, Antonia M.
dc.contributor.authorAlcántara-de la Cruz, Ricardo
dc.contributor.authorPrado, Rafael de
dc.date.accessioned2019-01-22T11:03:01Z
dc.date.available2020-01-09T23:13:41Z
dc.date.issued2019
dc.date.updated2019-01-22T11:03:01Z
dc.description.abstractAmaranthus palmeri S. Watson is probably the worst glyphosate-resistant (GR) weed worldwide. The EPSPS (5-enolpyruvylshikimate-3-phosphate-synthase) gene amplification has been reported as the major target-site-resistance (TSR) mechanism conferring resistance to glyphosate in this species. In this study, TSR and non-target-site-resistance (NTSR) mechanisms to glyphosate were characterized in a putative resistant A. palmeri population (GRP), harvested in a GR-soybean crop from Argentina. Glyphosate resistance was confirmed for the GRP population by dose-response assays. No evidence of TSR mechanisms as well as glyphosate metabolism was found in this population. Moreover, a susceptible population (GSP) that absorbed about 10% more herbicide than the GRP population was evaluated at different periods after treatment. The GSP population translocated about 20% more glyphosate to the remainder of the shoots and roots at 96 h after treatment than the control, while the GRP population retained 62% of herbicide in the treated leaves. This is the first case of glyphosate resistance in A. palmeri involving exclusively NTSR mechanisms.
dc.description.sponsorshipThis research was funded by the MINECO-Spain (Grant AGL2016-78944-R).
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1021/acs.jafc.8b06105
dc.identifier.idgrec028172
dc.identifier.issn0021-8561
dc.identifier.urihttp://hdl.handle.net/10459.1/65598
dc.language.isoeng
dc.publisher(c) American Chemical Society, 2019
dc.relationinfo:eu-repo/grantAgreement/MINECO//AGL2016-78944-R/ES/
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1021/acs.jafc.8b06105
dc.relation.ispartofJournal of Agricultural and Food Chemistry, 2019, vol. 67, núm. 4, p. 1052–1060
dc.rights(c) American Chemical Society, 2019
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.subjectEPSPS gene amplification
dc.subjectglyphosate resistance crops
dc.subjectnontarget-site-resistance
dc.subjectPalmer amaranth
dc.titleReduced absorption and impaired translocation endows glyphosate resistance in Amaranthus palmeri harvested in GR soybean from Argentina
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
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