1887

Abstract

A facultatively anaerobic, halotolerant, moderately thermophilic and non-sporulating bacterium, designated strain 10C, was isolated from deep-sea hydrothermal vent samples collected on the 13° N East Pacific Rise at a depth of approximately 2600 m. Cells of strain 10C were Gram-positive, motile rods, and grew optimally at 45 °C (range 12–49 °C), pH 7.0 (range pH 5.5–9.5) and 0–2 % NaCl (range 0–11 %). (+)--Lactate was the main organic acid detected from carbohydrate fermentation with traces of formate, acetate and ethanol. Strain 10C was catalase-positive, oxidase-negative and reduced nitrate to nitrite under anaerobic conditions. The DNA G+C content was 50.4 mol%. Its closest phylogenetic relatives were TF-16 and TF-80 (16S rRNA gene sequence similarity >99 %). However, strain 10C differed genotypically from these two species as indicated by DNA–DNA relatedness data. Therefore, on the basis of phenotypic, genotypic and phylogenetic characteristics, strain 10C is considered to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is 10C (=CCUG 50949=DSM 17289).

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2007-02-01
2021-02-27
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