A ubiquitous gammaproteobacterial clade dominates expression of sulfur oxidation genes across the mesopelagic ocean.

Autor: Baltar F; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria. federico.baltar@univie.ac.at., Martínez-Pérez C; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria.; Institute for Environmental Engineering, Department of Civil, Environmental and Geomatic Engineering, Eidgenossische Technische Hochschule (ETH) Zurich, Zurich, Switzerland., Amano C; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria., Vial M; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria., Robaina-Estévez S; Department of Microbiology, University of La Laguna, La Laguna, Spain., Reinthaler T; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria., Herndl GJ; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria.; Vienna Metabolomics Center, University of Vienna, Vienna, Austria.; NIOZ, Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research, Utrecht University, AB Den Burg, The Netherlands., Zhao Z; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria., Logares R; Institute of Marine Sciences (ICM), CSIC, Barcelona, Spain., Morales SE; Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand., González JM; Department of Microbiology, University of La Laguna, La Laguna, Spain. jmglezh@ull.edu.es.
Jazyk: angličtina
Zdroj: Nature microbiology [Nat Microbiol] 2023 Jun; Vol. 8 (6), pp. 1137-1148. Date of Electronic Publication: 2023 Apr 24.
DOI: 10.1038/s41564-023-01374-2
Abstrakt: The deep ocean (>200 m depth) is the largest habitat on Earth. Recent evidence suggests sulfur oxidation could be a major energy source for deep ocean microbes. However, the global relevance and the identity of the major players in sulfur oxidation in the oxygenated deep-water column remain elusive. Here we combined single-cell genomics, community metagenomics, metatranscriptomics and single-cell activity measurements on samples collected beneath the Ross Ice Shelf in Antarctica to characterize a ubiquitous mixotrophic bacterial group (UBA868) that dominates expression of RuBisCO genes and of key sulfur oxidation genes. Further analyses of the gene libraries from the 'Tara Oceans' and 'Malaspina' expeditions confirmed the ubiquitous distribution and global relevance of this enigmatic group in the expression of sulfur oxidation and dissolved inorganic carbon fixation genes across the global mesopelagic ocean. Our study also underscores the unrecognized importance of mixotrophic microbes in the biogeochemical cycles of the deep ocean.
(© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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