Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 62, Issue -, Pages 33-37Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.021451-0
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- RFBR [06-04-49011]
- Russian Academy of Sciences [01200957822]
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A psychrotolerant sulfate-reducing bacterium, designated B15(T), was isolated from supercooled water brine from within permafrost of the Varandey Peninsula, on the southern coast of the Barents Sea. Cells were Gram-negative, motile vibrions (3.0-4.0x0.4-0.5 mu m) with a single polar flagellum. The isolate was positive for desulfoviridin as a bisulfite reductase. Strain B15(T) grew at -2 to 28 degrees C (optimum 24 degrees C) and with 0-2.0% NaCl (optimum 0.2 %). The isolate used H-2 plus acetate, formate, ethanol, lactate, pyruvate and choline as electron donors and used sulfate, sulfite, thiosulfate, elemental sulfur, DMSO and Fe3+ as electron acceptors. Pyruvate and lactate were not fermented in the absence of sulfate. The G + C content of genomic DNA was 55.2 mol%. Analysis of the 16S rRNA gene sequence showed that the isolate belonged to the genus Desulfovibrio. Its closest relatives were Desulfovibrio idahonensis CY1(T) (98.8% 16S rRNA gene sequence similarity) and Desulfovibrio mexicanus Lup1(T) (96.5%). On the basis of genotypic, phenotypic and phylogenetic characteristics, the isolate represents a novel species, for which the name Desulfovibrio arcticus sp. nov. is proposed; the type strain is B15(T) (=VKM B-2367(T)=DSM 21064(T)).
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