1887

Abstract

A strictly anaerobic, slightly halophilic and moderately thermophilic, sporulating rod designated strain DVird3 was isolated from deep-sea hydrothermal vent samples collected at a depth of approximately 800 m on the Atlantic Ocean Ridge. Strain DVird3 possessed a few laterally inserted flagella, had a DNA G+C content of 33·1 mol% and grew optimally at pH 6·6 and at 45 °C. Growth was observed at temperatures between 20 and 58 °C and at pH values between 5·8 and 8·2. The optimum NaCl concentration for growth was 3 % sea salt (30 g l); no growth was observed in the presence of 15 or 60 g sea salt l. Strain DVird3 is heterotrophic and utilizes some sugars and various single amino acids. Acetate was the main fatty acid detected from carbohydrate fermentation, together with H and CO. Gelatin was used as an energy source. It performed the Stickland reaction. Phylogenetically, strain DVird3 branched with members of cluster XI of the order , with as its closest relative (similarity of 94·6 %). On the basis of its phenotypic, genotypic and phylogenetic characteristics, strain DVird3 (=DSM 15212 =CIP 107654) is proposed as the type strain of a novel species of the genus , sp. nov.

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2003-07-01
2020-06-02
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