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- Title
Global soil metagenomics reveals distribution and predominance of Deltaproteobacteria in nitrogen-fixing microbiome.
- Authors
Masuda, Yoko; Mise, Kazumori; Xu, Zhenxing; Zhang, Zhengcheng; Shiratori, Yutaka; Senoo, Keishi; Itoh, Hideomi
- Abstract
Background: Biological nitrogen fixation is a fundamental process sustaining all life on earth. While distribution and diversity of N2-fixing soil microbes have been investigated by numerous PCR amplicon sequencing of nitrogenase genes, their comprehensive understanding has been hindered by lack of de facto standard protocols for amplicon surveys and possible PCR biases. Here, by fully leveraging the planetary collections of soil shotgun metagenomes along with recently expanded culture collections, we evaluated the global distribution and diversity of terrestrial diazotrophic microbiome. Results: After the extensive analysis of 1,451 soil metagenomic samples, we revealed that the Anaeromyxobacteraceae and Geobacteraceae within Deltaproteobacteria are ubiquitous groups of diazotrophic microbiome in the soils with different geographic origins and land usage types, with particular predominance in anaerobic soils (paddy soils and sediments). Conclusion: Our results indicate that Deltaproteobacteria is a core bacterial taxon in the potential soil nitrogen fixation population, especially in anaerobic environments, which encourages a careful consideration on deltaproteobacterial diazotrophs in understanding terrestrial nitrogen cycling. D657cgwaNSF-wLxbnJEePr Video Abstract
- Subjects
NITROGEN fixation; METAGENOMICS; NITROGEN cycle; SOILS; SOIL microbiology
- Publication
Microbiome, 2024, Vol 12, Issue 1, p1
- ISSN
2049-2618
- Publication type
Article
- DOI
10.1186/s40168-024-01812-1