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Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column

Magnetotactic bacteria (MTB) are microorganisms thriving mostly at oxic–anoxic boundaries of aquatic habitats. MTB are efficient in biomineralising or sequestering diverse elements intracellularly, which makes them potentially important actors in biogeochemical cycles. Lake Pavin is a unique aqueous...

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Autores principales: Bidaud, Cécile C., Monteil, Caroline L., Menguy, Nicolas, Busigny, Vincent, Jézéquel, Didier, Viollier, Éric, Travert, Cynthia, Skouri-Panet, Fériel, Benzerara, Karim, Lefevre, Christopher T., Duprat, Élodie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8786505/
https://www.ncbi.nlm.nih.gov/pubmed/35082768
http://dx.doi.org/10.3389/fmicb.2021.789134
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author Bidaud, Cécile C.
Monteil, Caroline L.
Menguy, Nicolas
Busigny, Vincent
Jézéquel, Didier
Viollier, Éric
Travert, Cynthia
Skouri-Panet, Fériel
Benzerara, Karim
Lefevre, Christopher T.
Duprat, Élodie
author_facet Bidaud, Cécile C.
Monteil, Caroline L.
Menguy, Nicolas
Busigny, Vincent
Jézéquel, Didier
Viollier, Éric
Travert, Cynthia
Skouri-Panet, Fériel
Benzerara, Karim
Lefevre, Christopher T.
Duprat, Élodie
author_sort Bidaud, Cécile C.
collection PubMed
description Magnetotactic bacteria (MTB) are microorganisms thriving mostly at oxic–anoxic boundaries of aquatic habitats. MTB are efficient in biomineralising or sequestering diverse elements intracellularly, which makes them potentially important actors in biogeochemical cycles. Lake Pavin is a unique aqueous system populated by a wide diversity of MTB with two communities harbouring the capability to sequester not only iron under the form of magnetosomes but also phosphorus and magnesium under the form of polyphosphates, or calcium carbonates, respectively. MTB thrive in the water column of Lake Pavin over a few metres along strong redox and chemical gradients representing a series of different microenvironments. In this study, we investigate the relative abundance and the vertical stratification of the diverse populations of MTB in relation to environmental parameters, by using a new method coupling a precise sampling for geochemical analyses, MTB morphotype description, and in situ measurement of the physicochemical parameters. We assess the ultrastructure of MTB as a function of depth using light and electron microscopy. We evidence the biogeochemical niche of magnetotactic cocci, capable of sequestering large PolyP inclusions below the oxic–anoxic transition zone. Our results suggest a tight link between the S and P metabolisms of these bacteria and pave the way to better understand the implication of MTB for the P cycle in stratified environmental conditions.
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spelling pubmed-87865052022-01-25 Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column Bidaud, Cécile C. Monteil, Caroline L. Menguy, Nicolas Busigny, Vincent Jézéquel, Didier Viollier, Éric Travert, Cynthia Skouri-Panet, Fériel Benzerara, Karim Lefevre, Christopher T. Duprat, Élodie Front Microbiol Microbiology Magnetotactic bacteria (MTB) are microorganisms thriving mostly at oxic–anoxic boundaries of aquatic habitats. MTB are efficient in biomineralising or sequestering diverse elements intracellularly, which makes them potentially important actors in biogeochemical cycles. Lake Pavin is a unique aqueous system populated by a wide diversity of MTB with two communities harbouring the capability to sequester not only iron under the form of magnetosomes but also phosphorus and magnesium under the form of polyphosphates, or calcium carbonates, respectively. MTB thrive in the water column of Lake Pavin over a few metres along strong redox and chemical gradients representing a series of different microenvironments. In this study, we investigate the relative abundance and the vertical stratification of the diverse populations of MTB in relation to environmental parameters, by using a new method coupling a precise sampling for geochemical analyses, MTB morphotype description, and in situ measurement of the physicochemical parameters. We assess the ultrastructure of MTB as a function of depth using light and electron microscopy. We evidence the biogeochemical niche of magnetotactic cocci, capable of sequestering large PolyP inclusions below the oxic–anoxic transition zone. Our results suggest a tight link between the S and P metabolisms of these bacteria and pave the way to better understand the implication of MTB for the P cycle in stratified environmental conditions. Frontiers Media S.A. 2022-01-10 /pmc/articles/PMC8786505/ /pubmed/35082768 http://dx.doi.org/10.3389/fmicb.2021.789134 Text en Copyright © 2022 Bidaud, Monteil, Menguy, Busigny, Jézéquel, Viollier, Travert, Skouri-Panet, Benzerara, Lefevre and Duprat. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Bidaud, Cécile C.
Monteil, Caroline L.
Menguy, Nicolas
Busigny, Vincent
Jézéquel, Didier
Viollier, Éric
Travert, Cynthia
Skouri-Panet, Fériel
Benzerara, Karim
Lefevre, Christopher T.
Duprat, Élodie
Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column
title Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column
title_full Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column
title_fullStr Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column
title_full_unstemmed Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column
title_short Biogeochemical Niche of Magnetotactic Cocci Capable of Sequestering Large Polyphosphate Inclusions in the Anoxic Layer of the Lake Pavin Water Column
title_sort biogeochemical niche of magnetotactic cocci capable of sequestering large polyphosphate inclusions in the anoxic layer of the lake pavin water column
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8786505/
https://www.ncbi.nlm.nih.gov/pubmed/35082768
http://dx.doi.org/10.3389/fmicb.2021.789134
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