二氯苯醚菊酯对黄瓜叶片几种氧化酶活性的影响

Effects of Permethrin on Several Oxidative Enzyme Activities in Cucumber Leaves

研究结果表明 ,二氯苯醚菊酯 (PER)对黄瓜几种氧化酶活性有不同程度的影响 ,其影响的程度与PER的浓度有关 .2 0～ 40 0mg·L-1的PER分别使黄瓜体内的过氧化氢酶和乙醇酸氧化酶活性升高 3 35 %～ 32 71%和 4 42 %～ 34 5 1% .2 0～ 2 0 0mg·L-1的PER使过氧化物酶活性升高 9 70 %～ 2 9 10 % ;5 0～ 2 5 0mg·L-1的PER使吲哚乙酸氧化酶活性升高 13 5 8%～ 32 10 % ;5 0～ 30 0mg·L-1的PER使抗坏血酸氧化酶活性下降 3 18%～ 2 0 6 9% 用 2 0 0mg·L-1的PER处理黄瓜幼苗 1～ 6d后 ,体内过氧化物酶活性升高 10 37%～ 43 17%

The results of this investigation indicated that permethrin (PER) in 20～400 mg·L -1 increased the activities of catalase and glycolate oxidase in cucumber leaves by 3.35%～32.71% and 4.42%～34.51%, respectively. PER in 20～200 mg·L -1 increased the activity of peroxidase by 9.70%～29.10%. PER in 50～250 mg·L -1 increased the activity of indoleacetic acid oxidase by 13.58%～32.10%. The activity of ascorbate oxidase was decreased by 3.18%～20.69% by PER in the concentrations of 50～300 mg·L -1 . After the cucumber seedlings were treated with 200 mg·L -1 PER for 1～6 days, the activity of peroxidase increased by 10.37%～43.17%.