Specialized metabolic functions of keystone taxa sustain soil microbiome stability

文献类型： 外文期刊

第一作者： Xun, Weibing

作者： Xun, Weibing;Li, Wei;Ren, Yi;Xiong, Wu;Xu, Zhihui;Zhang, Nan;Miao, Youzhi;Shen, Qirong;Zhang, Ruifu;Liu, Yunpeng;Zhang, Ruifu

作者机构：

关键词： Soil incubation; Microbial diversity and stability; Co-occurrence network; Machine learning; Keystone function

期刊名称：MICROBIOME （ 影响因子：14.65； 五年影响因子：15.677 ）

ISSN： 2049-2618

年卷期： 2021 年 9 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundThe relationship between biodiversity and soil microbiome stability remains poorly understood. Here, we investigated the impacts of bacterial phylogenetic diversity on the functional traits and the stability of the soil microbiome. Communities differing in phylogenetic diversity were generated by inoculating serially diluted soil suspensions into sterilized soil, and the stability of the microbiome was assessed by detecting community variations under various pH levels. The taxonomic features and potential functional traits were detected by DNA sequencing.ResultsWe found that bacterial communities with higher phylogenetic diversity tended to be more stable, implying that microbiomes with higher biodiversity are more resistant to perturbation. Functional gene co-occurrence network and machine learning classification analyses identified specialized metabolic functions, especially "nitrogen metabolism" and "phosphonate and phosphinate metabolism," as keystone functions. Further taxonomic annotation found that keystone functions are carried out by specific bacterial taxa, including Nitrospira and Gemmatimonas, among others.ConclusionsThis study provides new insights into our understanding of the relationships between soil microbiome biodiversity and ecosystem stability and highlights specialized metabolic functions embedded in keystone taxa that may be essential for soil microbiome stability.

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