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Abstract

A novel anaerobic, moderately thermophilic bacterium (strain SGL43) was isolated from Severo-Stavropolskoye underground gas storage reservoir (Russia). Cells of strain SGL43 were motile straight rods, 0.4 µm in diameter and 2.0–3.0 µm in length. The temperature range for growth was 28–65 °C, with optimum growth at 50 °C. The pH range for growth was 5.5–8.0, with optimum growth at pH 7.0–7.5. Growth of strain SGL43 was observed at NaCl concentrations of 0–4.0 % (w/v) with optimum growth at 1.0 % (w/v) NaCl. Substrates utilized by strain SGL43 included peptone, yeast extract, glucose, fructose, maltose, galactose, pyruvate and citrate. Products of glucose or citrate fermentation were acetate, hydrogen and CO. Thiosulfate was reduced to sulfide. The DNA G+C content of strain SGL43 was 43.1 mol%. 16S rRNA gene sequence analysis revealed that strain SGL43 belongs to the order (phylum ‘ ’). The closest relative of strain SGL43 was (86.2 % 16S rRNA gene sequence similarity with the type strain). Based on the data presented here, strain SGL43 is considered to represent a novel species of a new genus, for which the name gen. nov., sp. nov. is proposed. The type strain of , the type species of the genus, is SGL43 ( = DSM 23830 = VKM B-2670).

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2012-07-01
2019-10-15
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