Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/963078
Research center of Embrapa/Collection: Embrapa Meio Ambiente - Artigo em periódico indexado (ALICE)
Date Issued: 2013
Type of Material: Artigo em periódico indexado (ALICE)
Authors: CATANEO, A. C.
FERREIRA, L. C.
MISCHAN, M. M.
VELINI, E. D.
CORNIANI, N.
CERDEIRA, A. L.
Additional Information: ANA 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.
Title: Mefenpyr-diethyl action on fenoxaprop-p-ethyl detoxification in wheat varieties.
Publisher: Planta Daninha, Viçosa, v. 31, n. 2, p. 387-393, 2013.
Language: en
Keywords: Conteúdo de lipídios
Seletividade
Description: Abstract: 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.
Thesagro: Trigo
Herbicida
NAL Thesaurus: Wheat
Pesticide selectivity
Glutathione transferase
Lipid content
Herbicide safeners
Data Created: 2013-07-31
Appears in Collections:Artigo em periódico indexado (CNPMA)

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