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Nucleopolyhedrovirus infection enhances plant defences by increasing plant volatile diversity

文献类型： 外文期刊

作者： Wan, Nian-Feng 1 ; Deng, Jian-Yu 3 ; Huang, Kai-Hua 1 ; Ji, Xiang-Yun 1 ; Zhang, Hao 1 ; Jiang, Jie-Xian 1 ; Li, Bo 2 ;

作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai Key Lab Protected Hort Technol, Shanghai 201403, Peoples R China

2.Fudan Univ, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Inst Biodivers Sci, Shanghai 200438, Peoples R China

3.Zhejiang Agr & Forestry Univ, Dept Plant Protect, Sch Agr & Food Sci, Linan, Peoples R China

关键词： Biological control;defensive function;parasitoid;tri-trophic system;volatile diversity

期刊名称：BIOCONTROL SCIENCE AND TECHNOLOGY （ 影响因子：1.665； 五年影响因子：1.616 ）

ISSN： 0958-3157

年卷期： 2017 年 27 卷 11 期

页码：

收录情况： SCI

摘要： Plant-herbivore-entomopathogen tri-trophic interactions and biodiversity are relatively understudied topics in ecology. Particularly, the effects of entomopathogens on herbivore-induced plant volatiles and plant volatile diversity on the defensive function of plants have not been studied in detail. We used soybean (Glycine max), beet armyworm larvae (Spodoptera exigua), and nucleopolyhedrovirus (NPV) as a tri-trophic system to determine whether NPV infection can promote the emission and diversity of volatiles from plants. We also investigated whether NPV infection affects the attraction of Microplitis pallidipes, an important endoparasitoid of larval S. exigua. Uninfested soybean plants released 7 detectable volatile compounds while plants fed upon by healthy and NPV-infected S. exigua larvae released 12 and 15 volatiles, respectively. Female parasitoids were more attracted to the volatiles from plants that were fed upon by NPV-infected larvae than healthy larvae, and more attracted to the volatiles from plants that were fed upon by healthy larvae than no larvae. The selective responses of parasitoids to plant odours increased as plant volatile diversity increased. Our study suggests that the NPV infection facilitates the release of plant volatiles and enhances the defensive function of plants by increasing plant volatile diversity which in turn attracts more parasitoids. Also, this work reveals that plants might accrue two indirect benefits from NPV infection, cessation of herbivore feeding and more parasitisation.

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