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

التفاصيل البيبلوغرافية
العنوان: Siderite-based anaerobic iron cycle driven by autotrophic thermophilic microbial consortium
المؤلفون: 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
المصدر: Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
بيانات النشر: Nature Portfolio, 2020.
سنة النشر: 2020
المجموعة: LCC:Medicine
LCC:Science
مصطلحات موضوعية: Medicine, Science
الوصف: 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.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2045-2322
Relation: https://doaj.org/toc/2045-2322
DOI: 10.1038/s41598-020-78605-7
URL الوصول: https://doaj.org/article/467158200102401295cadef50c688ba8
رقم الأكسشن: edsdoj.467158200102401295cadef50c688ba8
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20452322
DOI:10.1038/s41598-020-78605-7