MEFENPYR-DIETHYL ACTION ON FENOXAPROP-P-ETHYL DETOXIFICATION IN WHEAT VARIETIES

作者：Cataneo A C^*; Ferreira L C; Mischan M M; Velini E D; Corniani N; Cerdeira A L

来源：Planta Daninha, 2013, 31(2): 387-393.

DOI：10.1590/s0100-83582013000200016

• safener
• Triticum aestivum
• selectivity
• glutathione S-transferase
• lipid content

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.

• 出版日期2013-6