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

Planta Daninha

A.c. Cataneo²  L.c. Ferreira¹  M.m. Mischan¹  E.d. Velini¹  N. Corniani¹  A.l. Cerdeira¹ 

[1] ,UNESP Instituto de Biociências Dep. de Química e BioquímicaBotucatu SP ,Brasil

关键词: safener;    Triticum aestivum;    selectivity;    glutathione S-transferase;    lipid content;    safener;    Triticum aestivum;    seletividade;    glutationa S-transferase;    conteúdo de lipídios;   

DOI  :  10.1590/S0100-83582013000200016

来源: SciELO

【 摘 要 】

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 ha¹), 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.

【 授权许可】

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