Reduction of synthetic ferrihydrite by a binary anaerobic culture of Anaerobacillus alkalilacustris and Geoalkalibacter ferrihydriticus grown on mannitol at pH 9.5

Заварзина, Д. Г.; Kevbrin, V. V.; Zhilina, T. N.; Chistyakova, N. I.; Shapkin, Alexey V.; Zavarzin, G. A.

doi:10.1134/s0026261711060233

Cited by 11 publications

(5 citation statements)

References 12 publications

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“…At the end of the experiment, SEM revealed abundant spherical-shaped particles in the mineral phase of the bioreactor (globules Fig. 2 a,b), with an average size of about 2–5 µm, typical of previously reported metabolically induced siderite 32 . Some globules were formed on the surface of the initial hydrothermal siderite particles (Fig.…”

Section: Resultssupporting

confidence: 69%

“…The ability of these organisms to carry out anaerobic Fe(II) oxidation has never been tested. However, the proposed phylogenetic relations between Fe(III)-reducing and Fe(II)-oxidising EET pathways 38 , 42 as well as the demonstration of the ability of G. ferrireducens and F. ferrireducens to reduce and oxidise iron minerals under anoxic conditions 17 , 27 , 32 support such a possibility.…”

Section: Discussionmentioning

confidence: 98%

“…2 , 3 ). Such a morphology is fairly common for sedimentary siderite precipitated from saturated solutions 8 , in the reaction of glucose with ferrihydrite at pressure and temperature typical to diagenesis 3 , or formed by dissimilatory iron reducers 14 , 32 , 47 . Moreover, the parameters of Mössbauer spectra of siderite obtained in our experiments were identical to those reported previously for siderite produced by the thermophilic bacterium Thermincola ferriacetica in the course of ferrihydrite reduction 48 .…”

Section: Discussionmentioning

confidence: 99%

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

Заварзина

Kochetkova

Chistyakova

et al. 2020

Sci Rep

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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.

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Section: Resultssupporting

confidence: 69%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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

Заварзина

Kochetkova

Chistyakova

et al. 2020

Sci Rep

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“…5 ferrihydriticus is an alkaliphilic DIRB that can reduce iron(III) from SF with acetate, formate, ethanol or lactate as electron donors (Zavarzina et al, 2006(Zavarzina et al, , 2011. In binary cultures, these organisms could reproduce a simple trophic chain to decompose complex organic substrates in the anaerobic microbial community of soda lakes.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Oxidative biotransformation of biotite and glauconite by alkaliphilic anaerobes: The effect of Fe oxidation on the weathering of phyllosilicates

et al. 2016

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“…Studies on Glk. ferrihydriticus have shown high current densities and Coulombic efficiencies during the utilization of both ethanol and acetate as substrates, ,− but no further metabolic or electrochemical characterization has been performed. In comparison to G. sulfurreducens , Glk.…”

Section: Introductionmentioning

confidence: 99%

Anode Biofilms of Geoalkalibacter ferrihydriticus Exhibit Electrochemical Signatures of Multiple Electron Transport Pathways

et al. 2015

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Thriving under alkaliphilic conditions, Geoalkalibacter ferrihydriticus (Glk. ferrihydriticus) provides new applications in treating alkaline waste streams as well as a possible new model organism for microbial electrochemistry. We investigated the electrochemical response of biofilms of the alkaliphilic anode-respiring bacterium (ARB) Glk. ferrihydriticus voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry. We observed there to be at least four dominant electron transfer pathways, with their contribution to the overall current produced dependent on the set anode potential. These pathways appear to be manifested at midpoint potentials of approximately -0.14 V, -0.2 V, -0.24 V, and -0.27 V vs standard hydrogen electrode. The individual contributions of the pathways change upon equilibration from a set anode potential to another anode potential. Additionally, the contribution of each pathway to the overall current produced is reversible when the anode potential is changed back to the original set potential. The pathways involved in anode respiration in Glk. ferrihydriticus biofilms follow a similar, but more complicated, pattern as compared to those in the model ARB, Geobacter sulfurreducens. This greater diversity of electron transport pathways in Glk. ferrihydriticus could be related to its wider metabolic capability (e.g., higher pH and larger set of possible substrates, among others).

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Reduction of synthetic ferrihydrite by a binary anaerobic culture of Anaerobacillus alkalilacustris and Geoalkalibacter ferrihydriticus grown on mannitol at pH 9.5

Cited by 11 publications

References 12 publications

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

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

Oxidative biotransformation of biotite and glauconite by alkaliphilic anaerobes: The effect of Fe oxidation on the weathering of phyllosilicates

Anode Biofilms of Geoalkalibacter ferrihydriticus Exhibit Electrochemical Signatures of Multiple Electron Transport Pathways

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