Production of Current by Syntrophy Between Exoelectrogenic and Fermentative Hyperthermophilic Microorganisms in Heterotrophic Biofilm from a Deep-Sea Hydrothermal Chimney
To study the role of exoelectrogens within the trophic network of deep-sea hydrothermal vents, we performed successive subcultures of a hyperthermophilic community from a hydrothermal chimney sample on a mix of electron donors in a microbial fuel cell system. Electrode (the electron acceptor) was sw...
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| Veröffentlicht in: | Microbial ecology 2020-01, Vol.79 (1), p.38-49 |
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| creator | Pillot, Guillaume Davidson, Sylvain Auria, Richard Combet-Blanc, Yannick Godfroy, Anne Liebgott, Pierre-Pol |
| description | To study the role of exoelectrogens within the trophic network of deep-sea hydrothermal vents, we performed successive subcultures of a hyperthermophilic community from a hydrothermal chimney sample on a mix of electron donors in a microbial fuel cell system. Electrode (the electron acceptor) was swapped every week to enable fresh development from spent media as inoculum. The MFC at 80 °C yielded maximum current production increasing from 159 to 247 mA m⁻² over the subcultures. The experiments demonstrated direct production of electric current from acetate, pyruvate, and H₂ and indirect production from yeast extract and peptone through the production of H₂ and acetate from fermentation. The microorganisms found in on-electrode communities were mainly affiliated to exoelectrogenic Archaeoglobales and Thermococcales species, whereas in liquid media, the communities were mainly affiliated to fermentative Bacillales and Thermococcales species. The work shows interactions between fermentative microorganisms degrading complex organic matter into fermentation products that are then used by exoelectrogenic microorganisms oxidizing these reduced compounds while respiring on a conductive support. The results confirmed that with carbon cycling, the syntrophic relations between fermentative microorganisms and exoelectrogens could enable some microbes to survive as biofilm in extremely unstable conditions. |
| doi_str_mv | 10.1007/s00248-019-01381-z |
| format | Article |
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The results confirmed that with carbon cycling, the syntrophic relations between fermentative microorganisms and exoelectrogens could enable some microbes to survive as biofilm in extremely unstable conditions.</description><subject>Acetates</subject><subject>Acetates - metabolism</subject><subject>Acetic acid</subject><subject>Alternating current</subject><subject>Archaea - chemistry</subject><subject>Archaea - classification</subject><subject>Archaea - genetics</subject><subject>Archaea - physiology</subject><subject>Biochemical fuel cells</subject><subject>Biodiversity and Ecology</subject><subject>Biofilms</subject><subject>Biomedical and Life Sciences</subject><subject>Carbon cycle</subject><subject>Communities</subject><subject>Deep sea</subject><subject>Deep sea environments</subject><subject>Deep water</subject><subject>Ecology</subject><subject>Electric currents</subject><subject>Electricity</subject><subject>Electrodes</subject><subject>Electrodes - microbiology</subject><subject>ENVIRONMENTAL MICROBIOLOGY</subject><subject>Environmental Sciences</subject><subject>Fermentation</subject><subject>Geoecology/Natural Processes</subject><subject>Graphical representations</subject><subject>Heterotrophic microorganisms</subject><subject>Hydrogen - 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| ispartof | Microbial ecology, 2020-01, Vol.79 (1), p.38-49 |
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| language | eng |
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| source | Jstor Complete Legacy; MEDLINE; Springer Nature - Complete Springer Journals |
| subjects | Acetates Acetates - metabolism Acetic acid Alternating current Archaea - chemistry Archaea - classification Archaea - genetics Archaea - physiology Biochemical fuel cells Biodiversity and Ecology Biofilms Biomedical and Life Sciences Carbon cycle Communities Deep sea Deep sea environments Deep water Ecology Electric currents Electricity Electrodes Electrodes - microbiology ENVIRONMENTAL MICROBIOLOGY Environmental Sciences Fermentation Geoecology/Natural Processes Graphical representations Heterotrophic microorganisms Hydrogen - metabolism Hydrothermal plumes Hydrothermal springs Hydrothermal vents Hydrothermal Vents - microbiology Inoculum Interactions Life Sciences Microbial Ecology Microbiology Microorganisms Nature Conservation Organic matter Oxidation Oxidation-Reduction Peptones Pyruvic acid Pyruvic Acid - metabolism Subcultures Survival Syntrophism Vents Water Quality/Water Pollution Yeast Yeasts |
| title | Production of Current by Syntrophy Between Exoelectrogenic and Fermentative Hyperthermophilic Microorganisms in Heterotrophic Biofilm from a Deep-Sea Hydrothermal Chimney |
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