1887

Abstract

A thermotolerant, Gram-strain-negative, non-spore-forming and strictly aerobic bacterium, designated GU51, was isolated from Guhai hot spring in Jimsar county, Xinjiang province, north-west China. Each cell of strain GU51 consisted of an oval body and two symmetrical long (3–6 µm) prosthecae. The strain moved by polar flagellum. Oxidase and catalase were produced. Strain GU51 grew within the ranges of 37–65 °C (optimum 48–50 °C), 0.5–7.5 % (w/v) NaCl (optimum 2–3 %) and pH 6.0–9.0 (optimum pH 7.5). The major respiratory quinone detected was ubiquinone 10 (U-10) and the genomic DNA G+C content was 66.7±0.4 mol%. Major fatty acids (>5 %) were C, Cω7 and 11-methyl Cω7. The polar lipids consisted of diphosphatidylglycerol, five glycolipids, phosphatidylglycerol and an unknown phospholipid. Phylogenetic analysis showed the closest relatives of strain GU51 were members of the genus with 92.3 % 16S rRNA gene sequence similarity. On the basis of this polyphasic taxonomic characterization, it is suggested that strain GU51 represents a novel species of a new genus in the family ‘ ’, for which the name gen. nov., sp. nov. is proposed. The type strain of the type species is GU51 ( = CGMCC 1.12710 = JCM 19779).

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2014-08-01
2019-10-21
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