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Variation of gut microbiota caused by an imbalance diet is detrimental to bugs' survival

文献类型： 外文期刊

作者： Jing Luo;Yanxia Cheng;Libin Guo;Aoli Wang;Min Lu;Letian Xu

作者机构：

关键词： Adelphocoris suturalis; Different diet; Gut bacteria; Serratia marcescens

期刊名称： Sci. Total Environ.

ISSN： 0048-9697

年卷期： 2021 年 771 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Diet is an important factor in shaping and influencing both an insect's phenotype and gut bacterial community, which commonly establishes diversely symbiotic interactions with the host. Efforts to leverage the connection between diet, insects, and gut microbiome primarily focus on how diet alters insect's phenotype or gut microbial composition and relatively few studies have illuminated the link between the diet-induced insect phenotypic difference and variation of gut microbiota. Mirids bugs, Adelphocoris suturalis, are plant sap-feeding omnivores that sometimes complementarily prey on other insects, like aphids (the dietary regime is referred to hereafter as balanced diet). In this study, we found that an imbalanced diet (exclusive ingestion of aphids) induced significantly higher mortality in A. suturalis (86.66%). Further gut microbial community analysis showed that the dietary difference significantly changed both the abundance and composition of the bug's gut microbiome. Most notably, an abundance of entomopathogenic Serratia bacteria in the A. suturalis gut was positively correlated with the proportion of aphids in A. suturalis diet, and Serratia marcescens was found to transfer into the hemocoels of carnivorous bugs. Injection of S. marcescens to the hemocoels further confirmed its detrimental effect to the bugs. Collectively, our study suggests that the diet-altered variation of gut microbiota may be detrimental to host insect, advancing the knowledge of omnivorous insects' strategy in forage allocation of different foods. © 2021 Elsevier B.V.

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