垂柳挥发物的GC-MS成分分析

Analysis of Volatile Compounds of Salix babylonica by GC-MS

目的:研究垂柳挥发物的化学成分和相对含量,为探索垂柳挥发物吸引天敌的功效及其药用价值提供科学依据。方法:通过动态顶空吸附法收集垂柳挥发物,利用气质联用仪分析鉴定垂柳挥发物的化学成分和相对含量。结果:从垂柳挥发物中共鉴定出41种化学成分,其中健康垂柳挥发物33种,蚜害垂柳挥发物38种。健康垂柳挥发物与蚜害垂柳挥发物在组成和比例上存在显著差异。其中,蚜害垂柳挥发物新增6种烯类物质、1种醛类物质和1种酮类物质。结论:蚜害垂柳挥发物新增烯类、醛类和酮类化合物可能具有吸引天敌的功效,在生态保护垂柳中起着重要作用;垂柳挥发物的一些功能性成分具有良好药用价值,还需深入研究。

Objective：To study the volatile compounds of Salix babylonica,and to provide scientific basis for efficacy of attracting natural enemies and medicinal value of Salix babylonica. Methods ： The volatile compounds were collected from Salix babylonica by dy- namic headspace absorption method, and analyzed by gas chromatography-mass spectrum （ GC-MS）. Results ： Forty-one volatile com- pounds were identified from Salix babylonica. Intact plant of Salix babylonica had thirty-three kinds of volatile compounds and aphid-in- fested plant of Salix babylonica had thirty-eight kinds of volatile compounds. The volatile components of intact plant and aphid-infested plant had significant differences in the composition and proportion. Among them, the volatile components of aphid-infested plant added six kinds of vinyl materials, one kind of aldehyde and one kind of ketone. Conclusion：Adding volatile components, which included vinyl materials, aldehydes and ketones, might have the efficacy of attracting natural enemies. The volatile components might play an important role in the ecological protection for Salix babylonica. The functional components from the volatile compounds had good medicinal value, which are worthy of further research.