去莠津对黄瓜幼苗过氧化氢酶活性的影响

EFFECT OF ATRAZINE ON THE ACTIVITY OF CATALASE IN CUCUMBER LEAVES

研究结果表明，５～２０ｍｇ·Ｌ－１的去莠津使黄瓜叶片过氧化氢酶活性和蛋白质含量分别升高７５５％～１００７％和１４２％～７６７％。１０～２０ｍｇ·Ｌ－１的去莠津分别使黄瓜叶片ＤＮＡ和ＲＮＡ含量升高８１７％～１０９５％和４４７％～８６９％。去莠津对离体的过氧化氢酶活性无影响。放线菌酮对低浓度去莠津刺激过氧化氢酶活性和蛋白质含量增高有明显的抑制作用。讨论了低浓度的去莠津影响过氧化氢酶活性的可能机理。

The results of this investigation indicated that 5～20 mg·L -1 atrazine increased the activity of catalase and protein content in cucumber leaves by 7 55%～10 07%,and 1 42%～7 67%,respectively. Atrazine in 10～20 mg·L -1 increased the contents of DNA and RNA by 8 17%～10 95%,and 4 47%～8 69%,respectively.Atrazine had no effect on in vitro catalase activity.Cycloheximide significantly inhibited the promoting effects of atrazine on protein content and catalase activity. The action mechanism of atrazine on catalase activity was discussed.