Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium

Abstract Using a sample from a terrestrial hot spring (pH 6.8, 60 °C), we enriched a thermophilic microbial consortium performing anaerobic autotrophic oxidation of hydrothermal siderite (FeCO3), with CO2/bicarbonate as the electron acceptor and the only carbon source, producing green rust and aceta...

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Autores principales:	Daria G. Zavarzina, Tatiana V. Kochetkova, Nataliya I. Chistyakova, Maria A. Gracheva, Angelina V. Antonova, Alexander Yu. Merkel, Anna A. Perevalova, Michail S. Chernov, Yury A. Koksharov, Elizaveta A. Bonch-Osmolovskaya, Sergey N. Gavrilov, Andrey Yu. Bychkov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/467158200102401295cadef50c688ba8
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spelling	oai:doaj.org-article:467158200102401295cadef50c688ba82021-12-02T11:43:51ZSiderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium10.1038/s41598-020-78605-72045-2322https://doaj.org/article/467158200102401295cadef50c688ba82020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78605-7https://doaj.org/toc/2045-2322Abstract Using a sample from a terrestrial hot spring (pH 6.8, 60 °C), we enriched a thermophilic microbial consortium performing anaerobic autotrophic oxidation of hydrothermal siderite (FeCO3), with CO2/bicarbonate as the electron acceptor and the only carbon source, producing green rust and acetate. In order to reproduce Proterozoic environmental conditions during the deposition of banded iron formation (BIF), we incubated the microbial consortium in a bioreactor that contained an unmixed anoxic layer of siderite, perfectly mixed N2/CO2-saturated liquid medium and microoxic (2% O2) headspace. Long-term incubation (56 days) led to the formation of magnetite (Fe3O4) instead of green rust as the main product of Fe(II) oxidation, the precipitation of newly formed metabolically induced siderite in the anoxic zone, and the deposition of hematite (Fe2O3) on bioreactor walls over the oxycline boundary. Acetate was the only metabolic product of CO2/bicarbonate reduction. Thus, we have demonstrated the ability of autotrophic thermophilic microbial consortium to perform a short cycle of iron minerals transformation: siderite–magnetite–siderite, accompanied by magnetite and hematite accumulation. This cycle is believed to have driven the evolution of the early biosphere, leading to primary biomass production and deposition of the main iron mineral association of BIF.Daria G. ZavarzinaTatiana V. KochetkovaNataliya I. ChistyakovaMaria A. GrachevaAngelina V. AntonovaAlexander Yu. MerkelAnna A. PerevalovaMichail S. ChernovYury A. KoksharovElizaveta A. Bonch-OsmolovskayaSergey N. GavrilovAndrey Yu. BychkovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Daria G. Zavarzina Tatiana V. Kochetkova Nataliya I. Chistyakova Maria A. Gracheva Angelina V. Antonova Alexander Yu. Merkel Anna A. Perevalova Michail S. Chernov Yury A. Koksharov Elizaveta A. Bonch-Osmolovskaya Sergey N. Gavrilov Andrey Yu. Bychkov Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
description	Abstract Using a sample from a terrestrial hot spring (pH 6.8, 60 °C), we enriched a thermophilic microbial consortium performing anaerobic autotrophic oxidation of hydrothermal siderite (FeCO3), with CO2/bicarbonate as the electron acceptor and the only carbon source, producing green rust and acetate. In order to reproduce Proterozoic environmental conditions during the deposition of banded iron formation (BIF), we incubated the microbial consortium in a bioreactor that contained an unmixed anoxic layer of siderite, perfectly mixed N2/CO2-saturated liquid medium and microoxic (2% O2) headspace. Long-term incubation (56 days) led to the formation of magnetite (Fe3O4) instead of green rust as the main product of Fe(II) oxidation, the precipitation of newly formed metabolically induced siderite in the anoxic zone, and the deposition of hematite (Fe2O3) on bioreactor walls over the oxycline boundary. Acetate was the only metabolic product of CO2/bicarbonate reduction. Thus, we have demonstrated the ability of autotrophic thermophilic microbial consortium to perform a short cycle of iron minerals transformation: siderite–magnetite–siderite, accompanied by magnetite and hematite accumulation. This cycle is believed to have driven the evolution of the early biosphere, leading to primary biomass production and deposition of the main iron mineral association of BIF.
format	article
author	Daria G. Zavarzina Tatiana V. Kochetkova Nataliya I. Chistyakova Maria A. Gracheva Angelina V. Antonova Alexander Yu. Merkel Anna A. Perevalova Michail S. Chernov Yury A. Koksharov Elizaveta A. Bonch-Osmolovskaya Sergey N. Gavrilov Andrey Yu. Bychkov
author_facet	Daria G. Zavarzina Tatiana V. Kochetkova Nataliya I. Chistyakova Maria A. Gracheva Angelina V. Antonova Alexander Yu. Merkel Anna A. Perevalova Michail S. Chernov Yury A. Koksharov Elizaveta A. Bonch-Osmolovskaya Sergey N. Gavrilov Andrey Yu. Bychkov
author_sort	Daria G. Zavarzina
title	Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
title_short	Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
title_full	Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
title_fullStr	Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
title_full_unstemmed	Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
title_sort	siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/467158200102401295cadef50c688ba8
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Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium

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