水稻对丁草胺和乙草胺抗性的比较研究

COMPARATIVE STUDY ON THE RESISTANCE OF RICE TO BUTACHLOR AND ACETOCHLOR

水稻对丁草胺和乙草胺的抗性存在着明显的差异 .在芽期和苗期 ,0 .18μmol/L的乙草胺对水稻生长的抑制作用与 8.80 μmol/L丁草胺的抑制作用相似 .乙草胺对水稻种子萌发时GA3 诱导的α 淀粉酶活性的抑制作用明显比丁草胺强 .丁草胺可以显著诱导抗除草剂的GST(谷胱甘肽硫转移酶 )的活性 ,而乙草胺无明显诱导作用 。

Experiments were conducted to determine the different resistance of rice to butachlor and acetochlor. Growth inhibition caused by acetochlor at concentration 0.18 μmol/L is almost as the same as that caused by butachlor at concentration of 8.8 μmol/L in germinating and seedling period. There was a significant reduction in the activity of GA 3-induced α-amylase by acetochlor and the reduction caused by butachlor showed no significant change. Results of present research indicated no apparent relationship between GSH content and herbicide tolerance. GST activity was induced by butachlor and about 7 fold higher than that of control after 24h treatment, and no apparent change in GST activity after treatment by acetochlor was observed.