View in EDS

Microbial polyphenol metabolism is part of the thawing permafrost carbon cycle

Saved in:
Bibliographic Details
Title: Microbial polyphenol metabolism is part of the thawing permafrost carbon cycle
Authors: Bridget B. McGivern, Dylan R. Cronin, Jared B. Ellenbogen, Mikayla A. Borton, Eleanor L. Knutson, Viviana Freire-Zapata, John A. Bouranis, Lukas Bernhardt, Alma I. Hernandez, Rory M. Flynn, Reed Woyda, Alexandra B. Cory, Rachel M. Wilson, Jeffrey P. Chanton, Ben J. Woodcroft, Jessica G. Ernakovich, Malak M. Tfaily, Matthew B. Sullivan, Gene W. Tyson, Virginia I. Rich, Ann E. Hagerman, Kelly C. Wrighton
Source: Nat Microbiol
Publisher Information: Springer Science and Business Media LLC, 2024.
Publication Year: 2024
Subject Terms: 0301 basic medicine, Polyphenols/metabolism, 0303 health sciences, Bacteria, Arctic Regions, Monophenol Monooxygenase, Microbiota, Monophenol Monooxygenase/metabolism, Polyphenols, Permafrost, Article, Carbon, Carbon Cycle, Soil, 03 medical and health sciences, Bacteria/metabolism, Carbon/metabolism, Permafrost/microbiology, Oxidation-Reduction, Soil Microbiology, Ecosystem, Soil/chemistry
Description: With rising global temperatures, permafrost carbon stores are vulnerable to microbial degradation. The enzyme latch theory states that polyphenols should accumulate in saturated peatlands due to diminished phenol oxidase activity, inhibiting resident microbes and promoting carbon stabilization. Pairing microbiome and geochemical measurements along a permafrost thaw-induced saturation gradient in Stordalen Mire, a model Arctic peatland, we confirmed a negative relationship between phenol oxidase expression and saturation but failed to support other trends predicted by the enzyme latch. To inventory alternative polyphenol removal strategies, we built CAMPER, a gene annotation tool leveraging polyphenol enzyme knowledge gleaned across microbial ecosystems. Applying CAMPER to genome-resolved metatranscriptomes, we identified genes for diverse polyphenol-active enzymes expressed by various microbial lineages under a range of redox conditions. This shifts the paradigm that polyphenols stabilize carbon in saturated soils and highlights the need to consider both oxic and anoxic polyphenol metabolisms to understand carbon cycling in changing ecosystems.
Document Type: Article
Other literature type
Language: English
ISSN: 2058-5276
DOI: 10.1038/s41564-024-01691-0
Access URL: https://pubmed.ncbi.nlm.nih.gov/38806673
Rights: CC BY
Accession Number: edsair.doi.dedup.....0eecd648f167f133954512871aa0ab7b
Database: OpenAIRE
Description
Abstract:With rising global temperatures, permafrost carbon stores are vulnerable to microbial degradation. The enzyme latch theory states that polyphenols should accumulate in saturated peatlands due to diminished phenol oxidase activity, inhibiting resident microbes and promoting carbon stabilization. Pairing microbiome and geochemical measurements along a permafrost thaw-induced saturation gradient in Stordalen Mire, a model Arctic peatland, we confirmed a negative relationship between phenol oxidase expression and saturation but failed to support other trends predicted by the enzyme latch. To inventory alternative polyphenol removal strategies, we built CAMPER, a gene annotation tool leveraging polyphenol enzyme knowledge gleaned across microbial ecosystems. Applying CAMPER to genome-resolved metatranscriptomes, we identified genes for diverse polyphenol-active enzymes expressed by various microbial lineages under a range of redox conditions. This shifts the paradigm that polyphenols stabilize carbon in saturated soils and highlights the need to consider both oxic and anoxic polyphenol metabolisms to understand carbon cycling in changing ecosystems.
ISSN:20585276
DOI:10.1038/s41564-024-01691-0