Adaption mechanism and ecological role of CPR bacteria in brackish-saline groundwater.

IF 7.8 1区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

npj Biofilms and Microbiomes Pub Date : 2024-11-30 DOI:10.1038/s41522-024-00615-4

Jiawen Wang, Haohui Zhong, Qian Chen, Jinren Ni

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Abstract

Candidate phyla radiation (CPR) constitutes a substantial fraction of bacterial diversity, yet their survival strategies and biogeochemical roles in brackish-saline groundwater remain unknown. By reconstructing 399 CPR metagenome-assembled genomes (MAGs) and 2007 non-CPR MAGs, we found that CPR, affiliated with 44 previously proposed phyla and 8 putative novel phyla, played crucial roles in maintaining the microbial stability and complexity in groundwater. Metabolic reconstructions revealed that CPR participated in diverse processes, including carbon, nitrogen, and sulfur cycles. Adaption of CPR to high-salinity conditions could be attributed to abundant genes associated with heat shock proteins, osmoprotectants, and sulfur reduction, as well as their cooperation with Co-CPR (non-CPR bacteria co-occurred with CPR) for metabolic support and resource exchange. Our study enhanced the understanding of CPR biodiversity in high-salinity groundwater, highlighting the collaborative roles of self-adaptive CPR bacteria and their reciprocal partners in coping with salinity stress, maintaining ecological stability, and mediating biogeochemical cycling.

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微咸地下水中CPR细菌的适应机制及生态作用。

候选门辐射（CPR）构成了细菌多样性的很大一部分，但它们在微咸地下水中的生存策略和生物地球化学作用尚不清楚。通过重建399个CPR宏基因组组装基因组（MAGs）和2007个非CPR基因组组装基因组（MAGs），我们发现CPR与44个先前提出的门和8个假定的新门有关，在维持地下水微生物稳定性和复杂性方面发挥了至关重要的作用。代谢重建显示，心肺复苏术参与了多种过程，包括碳、氮和硫循环。CPR对高盐度条件的适应可能归因于与热休克蛋白、渗透保护剂和硫还原相关的丰富基因，以及它们与Co-CPR（与CPR同时发生的非CPR细菌）合作进行代谢支持和资源交换。我们的研究增强了对高盐度地下水中CPR生物多样性的认识，强调了自适应CPR细菌及其互惠伙伴在应对盐度胁迫、维持生态稳定和调节生物地球化学循环中的协同作用。

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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.