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Title: Soil microbial community response to corrinoids is shaped by a natural reservoir of vitamin B12

Journal Article · · The ISME Journal

Abstract Soil microbial communities perform critical ecosystem services through the collective metabolic activities of numerous individual organisms. Most microbes use corrinoids, a structurally diverse family of cofactors related to vitamin B12. Corrinoid structure influences the growth of individual microbes, yet how these growth responses scale to the community level remains unknown. Analysis of metagenome-assembled genomes suggests that corrinoids are supplied to the community by members of the archaeal and bacterial phyla Thermoproteota, Actinobacteria, and Proteobacteria. Corrinoids were found largely adhered to the soil matrix in a grassland soil, at levels exceeding those required by cultured bacteria. Enrichment cultures and soil microcosms seeded with different corrinoids showed distinct shifts in bacterial community composition, supporting the hypothesis that corrinoid structure can shape communities. Environmental context influenced both community- and taxon-specific responses to specific corrinoids. These results implicate corrinoids as key determinants of soil microbiome structure and suggest that environmental micronutrient reservoirs promote community stability.

Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0020155
OSTI ID:
2407196
Alternate ID(s):
OSTI ID: 2440632
Journal Information:
The ISME Journal, Journal Name: The ISME Journal Journal Issue: 1 Vol. 18; ISSN 1751-7362
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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