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Published online ahead of print on 19 June 2009 as doi:ijs.0.006569-0
International Journal of Systematic and Evolutionary Microbiology 2009;59:1620.

Int J Syst Evol Microbiol (2009); DOI 10.1099/ijs.0.006569-0
© 2009 International Union of Microbiological Societies
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Gracilibacillus saliphilus sp. nov., a novel moderately halophilic bacterium isolated from a saline lake

Shu-Kun Tang1, Yun Wang2, Kai Lou2, Pei-Hong Mao3, Xiang Jin3, Cheng-Lin Jiang4, Li-Hua Xu4 and Wen-Jun Li4,5

1 Yunnan Institute of Microbiology, Yunnan University;
2 Xinjiang Institute of Microbiology, Xinjiang Academy of Agricultural Science, Urumqi, Xinjiang, 8300;
3 Institute of Ion Beam Biotechnolog, College of Physics Science and Technology, Xinjiang University,;
4 Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, P. R. China.

5 E-mail: wjli{at}ynu.edu.cn

A novel Gram-positive, non-motile, aerobic bacterium, designated strain YIM 91119T, was isolated from Ebinur lake of a saline soil sample in Xinjiang province, north-west China. The isolate was a moderately halophilic bacterium, grew optimally at 10-15% NaCl (w/v) and at temperature of 28-37 °C. Comparative 16S rRNA gene sequence analysis showed that strain YIM 91119T belongs to the genus Gracilibacillus, exhibiting the highest levels of similarity with the sequence Gracilibacillus orientalis (97.8%), Gracilibacillus boraciitolerans (96.8%), Gracilibacillus dipsosauri (96.5%) and Gracilibacillus halotolerans (95.8%). DNA-DNA hybridization with Gracilibacillus orientalis AS 1.4250T showed a relatedness of 55%. The major fatty acids were anteiso-C15: 0, iso-C15: 0 and anteiso-C17: 0. The peptidoglycan type was A1{gamma}, meso-diaminopimelic acid directly cross-linked. The genomic DNA G+C content was 40.1 mol% and the predominant respiratory quinone was MK-7. The major polar lipids of strain YIM 91119T consisted of diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. On the basis of the polyphasic evidences, strain YIM 91119T represents a novel member of the genus Gracilibacillus, for which the name Gracilibacillus halophilus sp. nov., is proposed. The type strain of the novel species is YIM 91119T (= DSM 19802T = CCTCC AA 208015T).






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