Desulfovulcanus ferrireducens gen. nov., sp. nov., a thermophilic autotrophic iron and sulfate-reducing bacterium from subseafloor basalt that grows on akaganeite and lepidocrocite minerals.

ABSTRACT: A deep-sea thermophilic bacterium, strain Ax17^T, was isolated from 25 °C hydrothermal fluid at Axial Seamount. It was obligately anaerobic and autotrophic, oxidized molecular hydrogen and formate, and reduced synthetic nanophase Fe(III) (oxyhydr)oxide minerals, sulfate, sulfite, thiosulfate, and elemental sulfur for growth. It produced up to 20 mM Fe²⁺ when grown on ferrihydrite but < 5 mM Fe²⁺ when grown on akaganéite, lepidocrocite, hematite, and goethite. It was a straight to curved rod that grew at temperatures ranging from 35 to 70 °C (optimum 65 °C) and a minimum doubling time of 7.1 h, in the presence of 1.5-6% NaCl (optimum 3%) and pH 5-9 (optimum 8.0). Phylogenetic analysis based on 16S rRNA gene sequences indicated that the strain was 90-92% ident

SUBMITTER: Kashyap S 

PROVIDER: S-EPMC8860800 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature