中国农业科学 ›› 2007, Vol. 40 ›› Issue (12): 2747-2752 .

• 植物保护 • 上一篇    下一篇

表鱼藤酮对映体杀虫作用机理的研究

张 帅,曾鑫年,马莉敏,茹慧坤   

  1. 华南农业大学农药与化学生物学教育部重点实验室
  • 收稿日期:2006-11-22 修回日期:1900-01-01 出版日期:2007-12-10 发布日期:2007-12-10
  • 通讯作者: 曾鑫年

Studies on the Mechanism of Epi-rotenone Enantiomorphs

  

  1. 华南农业大学农药与化学生物学教育部重点实验室
  • Received:2006-11-22 Revised:1900-01-01 Online:2007-12-10 Published:2007-12-10

摘要: 【目的】阐明表鱼藤酮对映体(-)-5′α-表鱼藤酮与(+)-5′β-表鱼藤酮的杀虫作用与机理。【方法】以3龄家蚕幼虫为试虫,比较药剂处理24、72 h后中毒症状,及对线粒体呼吸酶复合体Ⅰ、Na+,K+-ATP酶、琥珀酸脱氢酶、乙酰胆碱酯酶活性差异。【结果】表鱼藤酮对映体处理后的3龄家蚕幼虫中毒症状明显不同;对线粒体呼吸酶复合体Ⅰ都有抑制活性,5′α-表鱼藤酮、5′β-表鱼藤酮抑制中浓度IC50分别为7.81、54.14 mg•L-1;对家蚕头部Na+,K+-ATP酶都有抑制作用;5′β-表鱼藤酮对中肠Na+,K+-ATP酶表现为抑制作用,5′α-表鱼藤酮表现为激活作用;对琥珀酸脱氢酶5′α-表鱼藤酮有激活作用;对乙酰胆碱酯酶活性没有影响。【结论】表鱼藤酮对映体的毒力及对线粒体呼吸酶复合体Ⅰ抑制活性有差异;对映体间引起的中毒症状差异与线粒体呼吸酶复合体Ⅰ的结合方式和中肠Na+,K+-ATP酶,琥珀酸脱氢酶有关。

关键词: 表鱼藤酮, 对映体, 作用机理, 线粒体呼吸酶, Na+, K+-ATP酶, 琥珀酸脱氢酶

Abstract: 【Objective】Study on mechanism of epi-rotenone enantiomorphs, (+)-5’β-epi-rotenone, (-)-5’α- epi-rotenone on insects. 【Method】The symptoms of Bombyx mori, treated with 5’β-epi-rotenone, 5’α- epi-rotenone were different, suggested that mechanism of epi-rotenone enantiomorphs maybe different from that of rotenone. The effects of epi-rotenone enantiomorphs on Na+,K+-ATPase , succinate dehydrogenase , AChE and bovine heart mitochondrial respiratory complex Ⅰwere measured. 【Results】The results indicated that epi-rotenone enantiomorphs had inhibiting effect on the Na+,K+-ATPase in the head of Bombyx mori, but it was found that only 5’α-epi-rotenone had activated effect on Na+,K+-ATPase in the midgut. Epi-rotenone enantiomorphs had activated effect on the activity of succinate dehydrogenase, the difference between 5’β-epi-rotenone and Blank were not significant, but that of 5’α-epi-rotenone and Blank were significant. Epi-rotenone enantiomorphs were no influence on the activity of AChE. Inhibiting effect on mitochondrial respiratory complex Ⅰ with IC50 value of 5’β-epi-rotenone, 5’α-epi-rotenone were 7.81mg/L、54.14mg/L, respectively. 【Conclusion】The differences of poison symptoms and inhibiting effect on enzymes indicated that mechanism of 5’β-epi-rotenone was the same with rotenone, but 5’α- epi-rotenone acted on Na+,K+-ATPase in the midgut and succinate dehydrogenase, besides on mitochondrial respiratory complex Ⅰ.

Key words: Epi-rotenone, Enantiomorph, Mechanism, Mitochondrial respiratory enzymes, Na+, K+-ATPase, Succinate dehydrogenase