A pan‐genomic approach reveals novel Sulfurimonas clade in the ferruginous meromictic Lake Pavin

The permanently anoxic waters in meromictic lakes create suitable niches for the growth of bacteria using sulphur metabolisms like sulphur oxidation. In Lake Pavin, the anoxic water mass hosts an active cryptic sulphur cycle that interacts narrowly with iron cycling, however the metabolisms of the m...

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Bibliographic Details
Published in:Molecular ecology resources 2024-04, Vol.24 (3), p.e13923-n/a
Main Authors: Biderre‐Petit, Corinne, Courtine, Damien, Hennequin, Claire, Galand, Pierre E., Bertilsson, Stefan, Debroas, Didier, Monjot, Arthur, Lepère, Cécile, Divne, Anna‐Maria, Hochart, Corentin
Format: Article
Language:English
Subjects:
Anoxic waters
Bacteria
Biodiversity and Ecology
Carbon cycle
Cycles
Environmental Sciences
Fresh water
freshwater
Genomics
Iron
Lakes
Life Sciences
meromictic lake
Meromictic lakes
Metagenomics
Microorganisms
New species
Oxidation
Oxidizing agents
pan-genome
Quantitative Methods
Sulfides
Sulfur
Sulfur oxidation
Sulfurimonas
sulphur oxidation
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Summary:The permanently anoxic waters in meromictic lakes create suitable niches for the growth of bacteria using sulphur metabolisms like sulphur oxidation. In Lake Pavin, the anoxic water mass hosts an active cryptic sulphur cycle that interacts narrowly with iron cycling, however the metabolisms of the microorganisms involved are poorly known. Here we combined metagenomics, single‐cell genomics, and pan‐genomics to further expand our understanding of the bacteria and the corresponding metabolisms involved in sulphur oxidation in this ferruginous sulphide‐ and sulphate‐poor meromictic lake. We highlighted two new species within the genus Sulfurimonas that belong to a novel clade of chemotrophic sulphur oxidisers exclusive to freshwaters. We moreover conclude that this genus holds a key‐role not only in limiting sulphide accumulation in the upper part of the anoxic layer but also constraining carbon, phosphate and iron cycling.
ISSN:1755-098X
1755-0998
1755-0998
DOI:10.1111/1755-0998.13923