Li-xia ZHAO, Qing-rui WANG, Ying FU, Chun-yan LI, Shuang GAO, Fei YEİ

Induction of Herbicide Detoxifying Enzyme in Maize by Chiral 3-Dichloroacetyl Oxazolidine

Safeners are important tools used to ensure to safe useof herbicide. The aim of this paper is to evaluate the protective effect of four safeners (R-28725, 3-dichloroacetyl oxazolidine and its two optical isomers) and investigate the mechanism of herbicide detoxication by safener. Laboratory studies were conducted to evaluate the effectiveness of safeners for protecting maize from the residues of preemergent herbicide fomesafen in Northeast Agricultural University, China. Physiological and biochemical tests were herein conducted under laboratory conditions, by using seed treatment with safeners and soil treatment with fomesafen, respectively. R-28725 provoked high glutathione level, glutathione-Stransferase activity and affinity of glutathione-S-transferase than other safeners, but R-isomer treatment resulted in complete reversal of injury caused by fomesafen.

Keywords:

Herbicide safener; Herbicide detoxication; 3-Dichloroacetyl oxazolidine; Fomesafen; Glutathione-Stransferase,

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