Objective:To investigate toxicity of deoxypodophyllotoxin(DOP) against 3rd instar larvae of Pieris rapae L. and its effects on activities of AChE and ATPase, and to study its insecticidal mechanism. Methods:The toxicity of DOP was measured with leaf-dipping method. The activites of enzymes were determined with AChE and ATPase assay kit. Result:① DOP exhibited toxicity against 3rd instar larvae of P. rapae L. This toxicity is concentration-time-dependent with LC50=151.87 mg/L(at 48 h)>LC50=39.99 mg/L (at 72 h)> LC50=10.60 mg/L(at 96 h).② DOP did not affect the activity of AChE. ③ DOP profoundly inhibited the activity of ATPase at high concentration(125 mg/L). DOP at middle concentration(5,25 mg/L) showed activative effect at 24 h,then recovered at 48 h, and maintained normal(5 mg/L) or exhibited inhibitory effect(25 mg/L) at 72 h. Conclusion:DOP exhibited toxicity against 3rd instar larvae of P. rapae L. AChE is not target of deoxypodophyllotoxin and ATPases may be one important target of deoxypodophyllotoxin.
张守刚,刘艳青,高 蓉,何 斌,赵鸿雁,狄旭东,程 洁,田 瑄,肖 杭.脱氧鬼臼毒素对3龄菜青虫头部AChE、ATPase活性的影响[J].南京医科大学学报(自然科学版英文版),2007,(6):542-545.