1887

Abstract

A mesophilic, endospore-forming, sulfate-reducing bacterium, designated strain NAW-5, was isolated from marsh soil. Cells of strain NAW-5 were Gram-stain-negative, curved rods that were motile. Strain NAW-5 grew at 18–48 °C (optimum 32–37 °C) and pH 5.8–8.4 (optimum pH 6.2–7.3). Electron donors utilized were various organic acids and H which support autotrophic growth. Fermentative growth occurred on carboxylic acids, but not on sugar. Sulfate, thiosulfate and elemental sulfur were used as electron acceptors. The respiratory isoprenoid quinone was MK-7. The genomic DNA G+C content of this strain was 46.6 mol%. Sequence analysis of the 16S rRNA gene showed that strain NAW-5 was affiliated to the family ‘’ but the strain shared very low sequence similarity with any representatives of this family (≥89 %). Strain NAW-5 belongs to subcluster Ig which does not include any species with validly published names. On the basis of significant differences in the phylogenetic and phenotypic properties between strain NAW-5 and related species, strain NAW-5 represents a novel species of a new genus for which the name gen. nov., sp. nov. is proposed. The type strain of the type species is NAW-5 (=DSM 102911=NBRC 112242).

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2017-08-01
2024-03-29
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