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Heavy metal exposure reduces larval gut microbiota diversity of the rice striped stem borer, Chilo suppressalis

文献类型： 外文期刊

作者： Wang, Jie 1 ; Huang, Hexi 1 ; Yang, Hailin 7 ; Wang, Su 1 ; Li, Mengnan 1 ; Zhu, Zhengyang 1 ; Trumble, John T. 8 ; Di, Ning 1 ; Zang, Liansheng 5 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Key Lab Nat Enemies Insects, Minist Agr & Rural Affairs, Beijing 100097, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Key Lab Environm Friendly Management Fruit & Veget, Coconstruct Minist & Prov, Beijing 100097, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing 100097, Peoples R China

4.Nanjing Agr Univ, Coll Plant Protect, Nanjing 210095, Peoples R China

5.Guizhou Univ, State Key Lab Green Pesticide, Guiyang 550025, Peoples R China

6.Guizhou Univ, Ctr R&D Fine Chem, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Peoples R China

7.Yunnan Tobacco Co, Yuxi Branch, Yuxi 653100, Peoples R China

8.Univ Calif Riverside, Dept Entomol, Riverside, CA 92521 USA

关键词： Heavy metal; Chilo suppressalis; Gut microbiota; Stress response; Bottom-up effect

期刊名称：ECOTOXICOLOGY （ 影响因子：2.4； 五年影响因子：2.7 ）

ISSN： 0963-9292

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Cadmium (Cd), a widely distributed environmental pollutant in agroecosystems, causes negative effects on crops and herbivores through bottom-up processes. The gut microbial community of an insect can play a critical role in response to metal stress. To understand how microbiota affect the stress responses of organisms to heavy metals in agroecosystems, we initially used 16S rRNA sequencing to characterize the larval gut microbiota of Chilo suppressalis, an important agricultural pest, exposed to a diet containing Cd. The species richness, diversity, and composition of the gut microbial community was then analyzed. Results revealed that while the richness (Chao1 and ACE) of gut microbiota in larvae exposed to Cd was not significantly affected, diversity (Shannon and Simpson) was reduced due to changes in species distribution and relative abundance. Overall, the most abundant genus was Enterococcus, while the abundance of the genera Micrococcaceae and Faecalibaculum in the control significantly superior to that in Cd-exposed pests. Phylogenetic investigation of microbial communities by the reconstruction of unobserved states (PICRUSt) showed that the intestinal microorganisms appear to participate in 34 pathways, especially those used in environmental information processing and the metabolism of the organism. This study suggests that the gut microbiota of C. suppressalis are significantly impacted by Cd exposure and highlights the importance of the gut microbiome in host stress responses and negative effects of Cd pollution in agroecosystems.

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