Plants recruit insecticidal bacteria to defend against herbivore attacks

文献类型： 外文期刊

第一作者： Xu, Wenyu

作者： Xu, Wenyu;Sun, Xiaoxiao;Mi, Liang;Gu, Ziqiong;Shu, Changlong;Zhang, Jie;Geng, Lili;Mi, Liang;Bai, Xi;Wang, Kui;Wang, Meiling

作者机构：

关键词： Plant-insect-microorganism interactions; Recruit; Rhizobacteria; Microbiome; Insecticidal activity

期刊名称：MICROBIOLOGICAL RESEARCH （ 影响因子：6.7； 五年影响因子：7.1 ）

ISSN： 0944-5013

年卷期： 2024 年 281 卷

页码：

收录情况： SCI

摘要： Pest feeding affects the rhizobacteria community. The rhizomicrobiota activates salicylic acid and jasmonic acid signaling pathways to help plants deal with pest infestation. However, whether plants can recruit special pesticidal microorganisms to deal with attack from herbivores is unclear. A system composed of peanuts and firstinstar larvae of Holotrichia parallela were used to analyze whether peanuts truly enrich the insecticidal bacteria after feeding by larvae, and whether inoculation of the enriched bacteria promotes the resistance of plants to herbivore. In this study, high-throughput sequencing of 16 S rRNA gene amplicons was used to demonstrate that infestation of the subterranean pest H. parallela quickly changed the rhizosphere bacterial community structure within 24 h, and the abundance of Enterobacteriaceae, especially Enterobacter, was manifestly enriched. Root feeding induced rhizobacteria to form a more complex co-occurrence network than the control. Rhizosphere bacteria were isolated, and 4 isolates with high toxicity against H. parallela larvae were obtained by random forest analysis. In a back-inoculation experiment using a split-root system, green fluorescent protein (GFP)labeled Enterobacter sp. IPPBiotE33 was observed to be enriched in uneaten peanut roots. Additionally, supplementation with IPPBiotE33 alleviated the adverse effects of H. parallela on peanuts. Our findings indicated that herbivore infestation could induce plants to assemble bacteria with specific larvicidal activity to address threats.

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