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n-octyl acrylate is a candidate sex pheromone component involved in courtship in parasitoid wasp Microplitis mediator

文献类型： 外文期刊

作者： Tao, Yu-Xiao 1 ; Shan, Shuang 1 ; Dewer, Youssef 3 ; Wang, Shan-Ning 4 ; Khashaveh, Adel 1 ; Li, Rui-Jun 2 ; Zhang, Yong-Jun 1 ;

作者机构： 1.Chinese Acad Agr Sci, State Key Lab Biol Plant Dis & Insect Pests, Inst Plant Protect, Beijing 100193, Peoples R China

2.Agr Univ Hebei, Coll Plant Protect, Baoding 071000, Hebei, Peoples R China

3.Agr Res Ctr, Bioassay Res Dept, Cent Agr Pesticide Lab, Sabahia Plant Protect Res Stn, Alexandria 21616, Egypt

4.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing Key Lab Environm Friendly Management Fruit, Beijing, Peoples R China

关键词： behavioral assay; courtship behavior; GC-EAD analysis; Microplitis mediator; sex pheromone

期刊名称：INSECT SCIENCE （ 影响因子：4.0； 五年影响因子：3.6 ）

ISSN： 1672-9609

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Sex pheromones are considered to play critical roles in partner communication of most parasitic Hymenoptera. However, the identification of sex pheromone components remains limited to a few families of parasitoid wasps. In this study, we functionally characterized a candidate sex pheromone component in Microplitis mediator (Hymenoptera: Braconidae), a solitary parasitoid of Noctuidae insects. We found that the body surface extract from female wasps could significantly stimulate courtship behavior of males. Gas chromatography-electroantennographic detection (GC-EAD) analysis revealed that a candidate semiochemical from extract triggered significant electrophysiological response of antennae of males. By performing gas chromatography-mass spectrometer (GC-MS) measurement, GC-EAD active compound was identified as n-octyl acrylate, a candidate sex pheromone component in female M. mediator. In electroantennogram (EAG) tests, antennae of male wasps showed significantly higher electrophysiological responses to n-octyl acrylate than those of females. Y-tube olfactometer assays indicated that male wasps significantly chose n-octyl acrylate compared with the control. Furthermore, male wasps showed a remarkable preference for n-octyl acrylate in a simulated field condition behavioral trial; simultaneously, n-octyl acrylate standard could also trigger significant courtship behavior in males. We propose that n-octyl acrylate, as a candidate vital sex pheromone component, could be utilized to design behavioral regulators of M. mediator to implement the protection and utilization of natural enemies.

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