Microbial gene expression in Guaymas Basin subsurface sediments responds to hydrothermal stress and energy limitation
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- Paraskevi Mara
- Geology and Geophysics Department, Woods Hole Oceanographic Institution , Woods Hole, MA, USA
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- Ying-Li Zhou
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) , Guangzhou, China
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- Andreas Teske
- Department of Earth, Marine and Environmental Sciences, University of North Carolina , Chapel Hill, NC, USA
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- Yuki Morono
- Kochi Institute for Core Sample Research, Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) , Monobe, Nankoku, Kochi, Japan
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- David Beaudoin
- Biology Department, Woods Hole Oceanographic Institution , Woods Hole, MA, USA
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- Virginia Edgcomb
- Geology and Geophysics Department, Woods Hole Oceanographic Institution , Woods Hole, MA, USA
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説明
<jats:title>Abstract</jats:title> <jats:p>Analyses of gene expression of subsurface bacteria and archaea provide insights into their physiological adaptations to in situ subsurface conditions. We examined patterns of expressed genes in hydrothermally heated subseafloor sediments with distinct geochemical and thermal regimes in Guaymas Basin, Gulf of California, Mexico. RNA recovery and cell counts declined with sediment depth, however, we obtained metatranscriptomes from eight sites at depths spanning between 0.8 and 101.9 m below seafloor. We describe the metabolic potential of sediment microorganisms, and discuss expressed genes involved in tRNA, mRNA, and rRNA modifications that enable physiological flexibility of bacteria and archaea in the hydrothermal subsurface. Microbial taxa in hydrothermally influenced settings like Guaymas Basin may particularly depend on these catalytic RNA functions since they modulate the activity of cells under elevated temperatures and steep geochemical gradients. Expressed genes for DNA repair, protein maintenance and circadian rhythm were also identified. The concerted interaction of many of these genes may be crucial for microorganisms to survive and to thrive in the Guaymas Basin subsurface biosphere.</jats:p>
収録刊行物
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- The ISME Journal
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The ISME Journal 17 (11), 1907-1919, 2023-09-01
Oxford University Press (OUP)