Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 61, Issue -, Pages 118-122Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.020834-0
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Funding
- National Basic Research Program of China Program 973 [2007CB411600, 2010CB833800]
- Department of Science and Technology of Yunnan Province, China [2006PY01-27]
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Two novel thermophilic, spore-forming bacterial strains, T-11(T) and E-112(T), were isolated from hot springs in Tengchong and Eryuan counties of Yunnan province in south-west China. The strains were Gram-stain-positive rods, occurring singly or in chains. Growth of strain T-11(T). was observed between 30 and 75 degrees C (optimum 50 degrees C) and at pH 7-11 (optimum pH 8.5), while the temperature range for strain E-112(T) was 35-70 degrees C (optimum 55 degrees C) and the pH range was 7.0-11.0 (optimum pH 8.0). The DNA G+C contents of strains T-11(T) and E-112(T) were 41.1 and 42.6 mol%, respectively. On the basis of 16S rRNA gene sequence similarity, the two strains were shown to be related most closely to Anoxybacillus species. The chemotaxonomic characteristics [predominant isoprenoid quinone menaquinone 7 (MK-7); major fatty acids iso-C-15:0 and iso-C-17:0] also supported the affiliation of strains T-11(T) and E-112(T) to the genus Anoxybacillus. The results of DNA DNA hybridization and physiological and biochemical tests allowed genotypic and phenotypic differentiation of strains T-11(T) and E-112(T) from Anoxybacillus species with validly published names. Strains T-11(T) and E-112(T) therefore represent two novel species, for which the names Anoxybacillus tengchongensis sp. nov. (type strain T-11(T) =CCTCC AB209237(T) =KCTC 13721(T)) and Anoxybacillus eryuanensis sp. nov. (type strain E-112(T) =CCTCC AB209236(T) =KCTC 13720(T)) are proposed.
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