Aphid endosymbiont facilitates virus transmission by modulating the volatile profile of host plants

文献类型： 外文期刊

第一作者： Shi, Xiao-Bin

作者： Shi, Xiao-Bin;Yan, Shuo;Zheng, Li-Min;Sun, Shu-E;Gao, Yang;Tan, Xin-Qiu;Zhang, De-Yong;Zhang, Chi;Zhou, Xu-Guo;Zhang, Zhan-Hong

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关键词： Myzus persicae; Buchnera aphidicola; Cucumber mosaic virus; Plant volatile; Multi-trophic interaction

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2021 年 21 卷 1 期

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收录情况： SCI

摘要： BackgroundMost plant viruses rely on vectors for their transmission and spread. One of the outstanding biological questions concerning the vector-pathogen-symbiont multi-trophic interactions is the potential involvement of vector symbionts in the virus transmission process. Here, we used a multi-factorial system containing a non-persistent plant virus, cucumber mosaic virus (CMV), its primary vector, green peach aphid, Myzus persicae, and the obligate endosymbiont, Buchnera aphidicola to explore this uncharted territory.ResultsBased on our preliminary research, we hypothesized that aphid endosymbiont B. aphidicola can facilitate CMV transmission by modulating plant volatile profiles. Gene expression analyses demonstrated that CMV infection reduced B. aphidicola abundance in M. persicae, in which lower abundance of B. aphidicola was associated with a preference shift in aphids from infected to healthy plants. Volatile profile analyses confirmed that feeding by aphids with lower B. aphidicola titers reduced the production of attractants, while increased the emission of deterrents. As a result, M. persicae changed their feeding preference from infected to healthy plants.ConclusionsWe conclude that CMV infection reduces the B. aphidicola abundance in M. persicae. When viruliferous aphids feed on host plants, dynamic changes in obligate symbionts lead to a shift in plant volatiles from attraction to avoidance, thereby switching insect vector's feeding preference from infected to healthy plants.

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