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- Emma Bell
- Environmental Microbiology Laboratory, Environmental Engineering Institute, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
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- Tiina Lamminmäki
- Posiva Oy , 27160 Eurajoki, Finland
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- Johannes Alneberg
- Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Gene Technology, KTH Royal Institute of Technology , SE-17121 Stockholm, Sweden
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- Anders F Andersson
- Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Gene Technology, KTH Royal Institute of Technology , SE-17121 Stockholm, Sweden
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- Chen Qian
- Chemical Sciences Division, Oak Ridge National Laboratory , Oak Ridge, TN 37830, USA
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- Weili Xiong
- Chemical Sciences Division, Oak Ridge National Laboratory , Oak Ridge, TN 37830, USA
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- Robert L Hettich
- Chemical Sciences Division, Oak Ridge National Laboratory , Oak Ridge, TN 37830, USA
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- Manon Frutschi
- Environmental Microbiology Laboratory, Environmental Engineering Institute, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
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- Rizlan Bernier-Latmani
- Environmental Microbiology Laboratory, Environmental Engineering Institute, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne , 1015 Lausanne, Switzerland
書誌事項
- 公開日
- 2020-02-11
- 権利情報
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- https://academic.oup.com/pages/standard-publication-reuse-rights
- http://www.springer.com/tdm
- http://www.springer.com/tdm
- DOI
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- 10.1038/s41396-020-0602-x
- 公開者
- Oxford University Press (OUP)
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>The deep terrestrial subsurface remains an environment where there is limited understanding of the extant microbial metabolisms. At Olkiluoto, Finland, a deep geological repository is under construction for the final storage of spent nuclear fuel. It is therefore critical to evaluate the potential impact microbial metabolism, including sulfide generation, could have upon the safety of the repository. We investigated a deep groundwater where sulfate is present, but groundwater geochemistry suggests limited microbial sulfate-reducing activity. Examination of the microbial community at the genome-level revealed microorganisms with the metabolic capacity for both oxidative and reductive sulfur transformations. Deltaproteobacteria are shown to have the genetic capacity for sulfate reduction and possibly sulfur disproportionation, while Rhizobiaceae, Rhodocyclaceae, Sideroxydans, and Sulfurimonas oxidize reduced sulfur compounds. Further examination of the proteome confirmed an active sulfur cycle, serving for microbial energy generation and growth. Our results reveal that this sulfide-poor groundwater harbors an active microbial community of sulfate-reducing and sulfide-oxidizing bacteria, together mediating a sulfur cycle that remained undetected by geochemical monitoring alone. The ability of sulfide-oxidizing bacteria to limit the accumulation of sulfide was further demonstrated in groundwater incubations and highlights a potential sink for sulfide that could be beneficial for geological repository safety.</jats:p>
収録刊行物
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- The ISME Journal
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The ISME Journal 14 (5), 1260-1272, 2020-02-11
Oxford University Press (OUP)
