溴氰菊酯对黄瓜幼苗过氧化氢酶活性的影响

EFFECTS OF DELTAMETHRIN ON CATALASE ACTIVITY IN CUCUMBER SEEDLINGS

摘要:

用100mgL-1的溴氰菊酯喷施黄瓜幼苗2d后，体内过氧化氢酶活性升高49．65％．150mgL-1的溴氰菊酯使体内蛋白质含量升高33．25％，使DNA和RNA含量分别上升15．39％和11．49％．而500mgL-1的溴氰菊酯却使过氧化氢酶活性降低6．94％，蛋白质、DNA和RNA含量分别降低10．22％、9．85％和16．20％．溴氰菊酯对高体的过氧化氨酶活性无影响．放线菌酮对溴氰菊酯影响蛋白质含量和过氧化氢酶活性有抑制作用．初步讨论了低浓度溴氰菊酯影响过氧化氢酶活性的可能原因．

Abstract:

Catalase activity in cucumber leaves increased by 49.65% after the seedlings weresprayed with 100 mg L-1 deltamethrin for 2 days. Deltamethrin of 150 mg L-1 increased thecontents of protein, DNA and RNA by 33.25%, 15.39% and 11.49%, respectively.However, high deltamethrin concentration(500 mg L-1) decreased the catalase aCtivity by6.94%, and decreased the contents of protein, DNA and RNA by 10.22%, 9.85% and16.20%, respectively. No effect of deltamethrin on in vitro catalase activity was found. Theeffects of deltamethrin on protein content and catalase activity in cucumber leaves could bepartially inhibited by cycloheximide. The possible mechanism of the effect of deltamethrinon catalase activity was discussed.