Mefenpyr-diethyl action on fenoxaprop-p-ethyl detoxification in wheat varieties.

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dc.contributorANA CATARINA CATANEO, IB-UNESP; LEONARDO CESAR FERREIRA, IB-UNESP; MARTHA MARIA MISCHAN, IB-UNESP; EDIVALDO DOMINGUES VELINI, FCA-UNESP; NATALIA CORNIANI, FCA-UNESP; ANTONIO LUIZ CERDEIRA, CNPMA.
dc.creatorCATANEO, A. C.
dc.creatorFERREIRA, L. C.
dc.creatorMISCHAN, M. M.
dc.creatorVELINI, E. D.
dc.creatorCORNIANI, N.
dc.creatorCERDEIRA, A. L.
dc.date2013-07-31T11:11:11Z
dc.date2013-07-31T11:11:11Z
dc.date2013-07-31
dc.date2013
dc.date2013-07-31T11:11:11Z
dc.date.accessioned2026-07-07T04:56:18Z
dc.descriptionAbstract: ABSTRACT - Safeners protect crops against herbicide injury. The aim of this study was to examine the differential susceptibility of five wheat (Triticum aestivum) varieties to the herbicide fenoxaprop-p-ethyl, as well as the performance of mefenpyr-diethyl on minimizing herbicide injury and on lipid contents. Varieties BRS 49, CD 104, CEP 24, IAPAR 78 and Rubi were sprayed with fenoxaprop-p-ethyl (69 g ha 1), fenoxaprop-p-ethyl + mefenpyr-diethyl (69 g + 18.75 g ha-1), or mefenpyr-diethyl (18.75 g ha-1). Plants were evaluated visually for injury at 7 and 14 days after treatment (DAT). Glutathione S-transferase (GST) activity was assayed in aerial parts at 7 DAT, and lipid content was measured at 14 DAT. Varieties CEP 24, IAPAR 78 and Rubi were more tolerant to fenoxaprop-p-ethyl than BRS 49, and CD 104 rapidly recovering from the slight phytotoxicity symptoms produced by the herbicide. Mefenpyr-diethyl prevented crop injury associated with the herbicide. GST activity did not correlate directly with fenoxaprop-p-ethyl detoxification. However, lipid content was related to the susceptibility of wheat to fenoxaprop-p-ethyl treatment. Resumo: Protetores ou safeners protegem culturas contra a injúria de herbicidas. O propósito deste estudo foi investigar a suscetibilidade diferencial de cinco variedades de trigo (Triticum aestivum) ao herbicida fenoxaprop-p-ethyl e o efeito do protetor mefenpyr-diethyl na minimização da injúria do herbicida e sobre o conteúdo de lipídios. As variedades BRS 49, CD 104, CEP 24, IAPAR 78 e Rubi foram pulverizadas com fenoxaprop-p-ethyl (69 g ha-1), fenoxaprop-p-ethyl + mefenpyr-diethyl (69 g + 18,75 g ha 1) ou mefenpyr-diethyl (18,75 g ha 1). A injúria das plantas foi avaliada visualmente aos 7 e 14 dias após o tratamento (DAT). A atividade da glutationa S-transferase (GST) foi analisada na parte aérea aos 7 DAT, e o conteúdo de lipídios, aos 14 DAT. As variedades CEP 24, IAPAR 78 e Rubi foram mais tolerantes ao fenoxaprop-p-ethyl do que a BRS 49, e a variedade CD 104 rapidamente se recuperou dos sintomas de intoxicação produzidos pelo herbicida. Mefenpyrdiethyl preveniu a injúria da cultura pelo herbicida. A atividade da GST não foi correlacionada diretamente com a desintoxicação do fenoxaprop-p-ethyl. Contudo, o conteúdo de lipídios esteve relacionado à suscetibilidade de trigo ao tratamento de fenoxaprop-p-ethyl.
dc.identifierPlanta Daninha, Viçosa, v. 31, n. 2, p. 387-393, 2013.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/963078
dc.identifier.urihttp://hdl.handle.net/123456789/475052
dc.languageeng
dc.rightsopenAccess
dc.subjectConteúdo de lipídios
dc.subjectSeletividade
dc.subjectTrigo
dc.subjectHerbicida
dc.subjectWheat
dc.subjectPesticide selectivity
dc.subjectGlutathione transferase
dc.subjectLipid content
dc.subjectHerbicide safeners
dc.titleMefenpyr-diethyl action on fenoxaprop-p-ethyl detoxification in wheat varieties.
dc.typeArtigo de periódico

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