Metaproteomics reveals functional partitioning and vegetational variation among permafrost-affected Arctic soil bacterial communities.

ABSTRACT: Microbial activity in Arctic soils controls the cycling of significant stores of organic carbon and nutrients. We studied in situ processes in Alaskan soils using original metaproteomic methods in order to relate important heterotrophic functions to microbial taxa and to understand the microbial response to Arctic greening. Major bacterial groups show strong metabolic specialization in organic topsoils. α-/β-/γ-Proteobacteria specialized in the acquisition of small, soluble compounds, whereas Acidobacteria, Actinobacteria, and other detritosphere groups specialized in the degradation of plant-derived polymers. α-/β-/γ-Proteobacteria dominated the expression of transporters for common root exudates and limiting nitrogenous compounds, supporting an ecological model of dependence upon

SUBMITTER: Miller SE 

PROVIDER: S-EPMC10308928 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature