白星花金龟对醇和醛类植物挥发物的触角电位反应

Electroantennogram Responses of Female and Male Adults of Potosia brevitasis Lewis to Volatile Alcohols and Aldehydes

【目的】白星花金龟(Potosia brevitasis Lewis)属鞘翅目,花金龟科。是一种分布范围广,寄主种类多的农业害虫。了解白星花金龟雌、雄成虫对不同碳链长度和不饱度的醇和醛类化合物的电生理反应差异。【方法】采用触角电位(electroantennograph,EAG)技术对33种白星花金龟寄主植物所产生的挥发物进行测定。【结果】白星花金龟雌雄成虫对Hexanol、Heptanol、Octanol、Nonanol、Hexanal、Heptanal、Octanal、Nonanal、(Z)-3-Hexenol、(E)-2-Hexenol具有较强的EAG反应。并且在相同刺激剂量下,雌虫的EAG反应明显高于雄虫。在相同的剂量下,一级醇到三级醇引起的EAG的反应值呈现逐渐减少的趋势。6~9个碳的饱和醛引起EAG反应明显,其中8个碳的醛Octanal的EAG反应值最大。【结论】白星花金龟雌成虫对醇和醛类挥发物的EAG反应高于雄成虫。

The Potosia brevitasis Lewis belongs to the family cetoniidae of coleoptera. It is distributed throughout China, and has a wide host range. 【Objective】 To better understand differential responses of fe-male and male adults of _P. brevitasis to alcohols and aldehydes with different carbon chain - length and unsat-uration. 【Method】A total of 33 compounds were chosen for electrophysiological response test using electroan- tennography technique.【Result 】The results showed that Hexanol,Heptanol,Octanol, Nonanol, （ Z ） - 3 - Hexenol, （Z） - 2 - Hexenol elicited significant EAG responses. At the same dose, the females always dis-played stronger responses than males. Furthermore, the responses to primary, secondary, and tertiary alcohols decreased gradually. The saturated aldehydes with 6 to 9 carbon chain - length elicited significant EAG re-sponses, among which, the 8 carbon aldehyde octanal the EAG reaction value was the largest .【Conclusion】 The EAG responses of volatile alcohols and aldehydes in female adults was higher than in male adults.