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| Cambon-bonavita, Marie-anne; Aubé, Johanne; Cueff-gauchard, Valerie; Reveillaud, Julie. |
| Background Free-living and symbiotic chemosynthetic microbial communities support primary production and higher trophic levels in deep-sea hydrothermal vents. The shrimp Rimicaris exoculata, which dominates animal communities along the Mid-Atlantic Ridge, houses a complex bacterial community in its enlarged cephalothorax. The dominant bacteria present are from the taxonomic groups Campylobacteria, Desulfobulbia (formerly Deltaproteobacteria), Alphaproteobacteria, Gammaproteobacteria, and some recently discovered iron oxyhydroxide-coated Zetaproteobacteria. This epibiotic consortium uses iron, sulfide, methane, and hydrogen as energy sources. Here, we generated shotgun metagenomes from Rimicaris exoculata cephalothoracic epibiotic communities to reconstruct... |
| Tipo: Text |
Palavras-chave: Niche partitioning; Rimicaris; Metagenome-assembled genomes; Zetaproteobacteria; Holobiont; Hydrothermal vents. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00689/80089/83128.pdf |
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| Pérez-bernal, Maria Fernanda; Brito, Elcia M. S.; Bartoli, Manon; Aubé, Johanne; Ollivier, Bernard; Guyoneaud, Rémy; Hirschler-réa, Agnès. |
| A novel Gram-negative, non-spore-forming, vibrio-shaped, anaerobic, alkaliphilic, sulfate-reducing bacterium, designated strain PAR22NT, was isolated from sediment samples collected at an alkaline crater lake in Guanajuato (Mexico). Strain PAR22NT grew at temperatures between 15 and 37 °C (optimum, 32 °C), at pH between pH 8.3 and 10.1 (optimum, pH 9.0–9.6), and in the presence of NaCl up to 10 %. Pyruvate, 2-methylbutyrate and fatty acids (4–18 carbon atoms) were used as electron donors in the presence of sulfate as a terminal electron acceptor and were incompletely oxidized to acetate and CO2. Besides sulfate, both sulfite and elemental sulfur were also used as terminal electron acceptors and were reduced to sulfide. The predominant fatty acids were... |
| Tipo: Text |
Palavras-chave: Alkaliphilic anaerobic bacterium; Sulfate reduction; Desulfobotulus. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00622/73396/72613.pdf |
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