Gut bacteria facilitate leaf beetles in adapting to dietary specialization by enhancing larval fitness.

IF 7.8 1区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY npj Biofilms and Microbiomes Pub Date : 2024-10-22 DOI:10.1038/s41522-024-00587-5

Meiqi Ma, Jing Luo, Xiaotong Chen, Chong Li, Siqun Li, Jianghua Sun, Letian Xu

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Abstract

Dietary specialization between insect stages can reduce intraspecific food competition. The involvement of gut bacteria and the mechanisms underlying this phenomenon received limited attention. Plagiodera versicolora is a pest harming Salicaceae trees. Here, we confirmed dietary specialization in P. versicolora, wherein adults prefer new leaves, while larvae predominantly consume mature leaves when both types are available. We demonstrated the larval preference for mature leaves confers ecological advantages by promoting growth, development and immunity and this advantage is contingent upon the presence of gut bacteria. Gut microbiota in larvae revealed a significant enrichment of Pantoea when feeding new leaves, with P. anthophila exhibiting the most pronounced inhibitory effect on larval development. Further exploration identified specific metabolites, such as Tyrosyl-valine, with higher content in new leaves, which serve as substrates for the entomopathogenic gut bacterium to facilitate its proliferation. This study provides a fresh perspective on the ecological role of gut bacteria.

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肠道细菌通过提高幼虫的适应能力，促进叶甲虫适应食物的专门化。

昆虫不同阶段之间的食物专一性可以减少种内食物竞争。肠道细菌的参与和这一现象的内在机制受到的关注有限。Plagiodera versicolora 是一种危害水杨科树木的害虫。在这里，我们证实了 P. versicolora 的食物专一性，即成虫偏爱新叶，而幼虫在两种叶片都有的情况下则主要食用成熟叶片。我们证明，幼虫偏爱成熟树叶能促进生长、发育和免疫，从而带来生态优势，而这种优势取决于肠道细菌的存在。幼虫的肠道微生物群显示，在取食新叶时，盘菌显著富集，其中嗜蚁盘菌对幼虫的发育有最明显的抑制作用。进一步研究发现，新叶中的酪氨酰-缬氨酸等特定代谢物含量较高，可作为昆虫病原肠道细菌的底物，促进其增殖。这项研究为肠道细菌的生态作用提供了一个全新的视角。

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来源期刊

npj Biofilms and Microbiomes Immunology and Microbiology-Microbiology

CiteScore

12.10

自引率

3.30%

发文量

审稿时长

9 weeks

期刊介绍： npj Biofilms and Microbiomes is a comprehensive platform that promotes research on biofilms and microbiomes across various scientific disciplines. The journal facilitates cross-disciplinary discussions to enhance our understanding of the biology, ecology, and communal functions of biofilms, populations, and communities. It also focuses on applications in the medical, environmental, and engineering domains. The scope of the journal encompasses all aspects of the field, ranging from cell-cell communication and single cell interactions to the microbiomes of humans, animals, plants, and natural and built environments. The journal also welcomes research on the virome, phageome, mycome, and fungome. It publishes both applied science and theoretical work. As an open access and interdisciplinary journal, its primary goal is to publish significant scientific advancements in microbial biofilms and microbiomes. The journal enables discussions that span multiple disciplines and contributes to our understanding of the social behavior of microbial biofilm populations and communities, and their impact on life, human health, and the environment.