1887

Abstract

Two aerobic, Gram-negative, non-motile, non-sporulating, yellow-pigmented bacteria, strains TH92 and TH91, were isolated from a hot spring located in Laibin, Guangxi, in the south-eastern geothermal area of China. The isolates grew at 40–77 °C (optimally at 70 °C) and at pH 6.0–9.5 (optimally at pH 7.5–8.0). Phylogenetic analysis of 16S rRNA gene sequences and levels of DNA–DNA relatedness together indicated that the new isolates represented a novel species of the genus with closest affinity to , and . Compared with their closest relatives, strains TH92 and TH91 were able to assimilate a wider range of carbohydrates, amino acids and organic acids as sole carbon sources for growth, such as lactose and melibiose. The new isolates had lower combined levels of C and iso-C compared with their closest relatives. On the basis of polyphasic taxonomic characterization, strains TH92 and TH91 are considered to represent a single novel species of the genus , for which the name sp. nov. is proposed. The type strain is TH92 (=CGMCC 1.6992 =JCM 15153).

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2010-04-01
2020-11-30
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