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A Global Relationship Between Genome Size and Encoded Carbon Metabolic Strategies of Soil Bacteria

文献类型： 外文期刊

作者： Wu, Xingjie 1 ; Peng, Jingjing 1 ; Malik, Ashish Anil 2 ; Peng, Ziheng 3 ; Luo, Yu 4 ; Fan, Fenliang 5 ; Lu, Yahai 6 ; Wei, Gehong 3 ; Delgado-Baquerizo, Manuel 7 ; Liesack, Werner 8 ; Jiao, Shuo 3 ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, State Key Lab Nutrient Use & Management, Natl Acad Agr Green Dev,Key Lab Plant Soil Interac, Beijing, Peoples R China

2.Univ Edinburgh, Sch Geosci, Edinburgh, Scotland

3.Northwest A&F Univ, Coll Life Sci, State Key Lab Crop Stress Biol Arid Areas, Shanxi Key Lab Agr & Environm Microbiol, Yangling, Peoples R China

4.Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Hangzhou, Peoples R China

5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing, Peoples R China

6.Peking Univ, Coll Urban & Environm Sci, Beijing, Peoples R China

7.CSIC, Inst Recursos Nat & Agrobiol Sevilla IRNAS, Lab Biodivers & Funcionamiento Ecosistem, Seville, Spain

8.Max Planck Inst Terr Microbiol, Marburg, Germany

关键词： bacterial strategies; carbon cycle; genome size; metagenomics; microbial traits

期刊名称：ECOLOGY LETTERS （ 影响因子：7.9； 五年影响因子：9.4 ）

ISSN： 1461-023X

年卷期： 2025 年 28 卷 1 期

页码：

收录情况： SCI

摘要： Microbial traits are critical for carbon sequestration and degradation in terrestrial ecosystems. Yet, our understanding of the relationship between carbon metabolic strategies and genomic traits like genome size remains limited. To address this knowledge gap, we conducted a global-scale meta-analysis of 2650 genomes, integrated whole-genome sequencing data, and performed a continental-scale metagenomic field study. We found that genome size was tightly associated with an increase in the ratio between genes encoding for polysaccharide decomposition and biomass synthesis that we defined as the carbon acquisition-to-biomass yield ratio (A/Y). We also show that horizontal gene transfer played a major evolutionary role in the expanded bacterial capacities in carbon acquisition. Our continental-scale field study further revealed a significantly negative relationship between the A/Y ratio and soil organic carbon stocks. Our work demonstrates a global relationship between genome size and the encoded carbon metabolic strategies of soil bacteria across terrestrial microbiomes.

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