Bacillus urumqiensis sp nov., a moderately haloalkaliphilic bacterium isolated from a salt lake

文献类型： 外文期刊

第一作者： Zhang, Shanshan

作者： Zhang, Shanshan;Yan, Yanchun;Zhao, Baisuo;Li, Zhaojun;Li, Jun;Zhang, Chuanlun

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期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.747； 五年影响因子：2.889 ）

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收录情况： SCI

摘要： A Gram-stain-positive, rod-shaped, aerobic and moderately haloalkaliphilic bacterium, designated BZ-SZ-XJ18(T), was isolated from the mixed water and sediment of a saline-alkaline lake located in the Xinjiang Uyghur Autonomous Region of China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain BZ-SZ-XJ18(T) was a member of the genus Bacillus. The closest phylogenetic relatives were Bacillus saliphilus 6AG(T) (96.7% 16S rRNA gene sequence similarity), 'Bacillus daqingensis' X10-1 (96.6 %), Bacillus luteus JC167(T) (96.5 %), Bacillus daliensis DLS13(T) (96.2%), Bacillus chagannorensis CG-15(T) (95.2%) and Bacillus polygoni YN-1(T) (95.0 %). DNA-DNA relatedness between strain BZ-SZ-XJ18(T) and the reference type strains of the related species of the genus Bacillus was lower than 27%. The isolate formed yellow pigment and grew in the presence of 0.22-4.32 M Na+ (equivalent to 1.3-25.3%, w/v, NaCl) (optimum 1.08 M Nal(+), equivalent to 6.3%, w/v, NaCl), at pH 6.5-10.0 (optimum pH 8.5-9.5) and at 8-41 degrees C (optimum 37 degrees C). The major cellular fatty acids were anteiso-C-15:0 (43.0%), C-16:0 (18.1 %), iso-C-15:0 (11.3%), anteiso-C-17:0 (8.0%) and iso-C-16:0 (7.0%). The major polar lipids consisted of diphosphatidylglycerol and phosphatidylglycerol. The main respiratory quinone was menaquinone-7 (MK-7), and the peptidoglycan type of the cell wall was A1 gamma based on meso-diaminopimelic acid as the diagnostic diamino acid. The genomic DNA G+C content was 42.3 mol% (HPLC) or 41.4 mol% (T-m). On the basis of phenotypic, chemotaxonomic and phylogenetic features, strain BZ-SZ-XJ18(T) is proposed to represent a novel species, Bacillus urumqiensis within the genus Bacillus. The type strain is BZ-SZ-XJ18(T) (=DSM 29145(T)=JCM 30195(T)).

分类号： Q

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