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Int J Syst Evol Microbiol 59 (2009), 28-33; DOI  10.1099/ijs.0.65735-0
© 2009 International Union of Microbiological Societies

Paraliobacillus quinghaiensis sp. nov., isolated from salt-lake sediment in China

Yi-Guang Chen1,2, Xiao-Long Cui1, Yu-Qin Zhang1,3, Wen-Jun Li1, Yong-Xia Wang1, Li-Hua Xu1, Meng-Liang Wen1, Qian Peng1 and Cheng-Lin Jiang1

1 Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China
2 College of Bio-resources and Environmental Science, Jishou University, Jishou, Hunan 416000, PR China
3 Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China

Correspondence
Xiao-Long Cui
xlcuiynu{at}yahoo.com.cn
or
xlcui{at}ynu.edu.cn

A Gram-positive, moderately halophilic, endospore-forming, catalase- and oxidase-positive, obligately aerobic bacterium, designated strain YIM-C158T, was isolated from sediment of a salt lake in the Qaidam Basin, north-west China. Cells were motile with peritrichous flagella and rod-shaped, with meso-diaminopimelic acid in the cell-wall peptidoglycan. Strain YIM-C158T grew in the presence of 1–20 % (w/v) NaCl and pH 6.0–10.0, with optimum growth at 5 % (w/v) NaCl and pH 8.0. The strain grew at 4–50 °C, with optimum growth at 37 °C. The major cellular fatty acids were anteiso-C15 : 0, iso-C14 : 0, C16 : 0, anteiso-C17 : 0, iso-C16 : 0, C16 : 1{omega}7c alcohol and C16 : 1{omega}11c. Strain YIM-C158T contained menaquinone MK-7 as the sole respiratory quinone and phosphatidylmethylethanolamine and phosphatidylcholine as the polar lipids. The genomic DNA G+C content was 39.5 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain YIM-C158T was most closely related to Paraliobacillus ryukyuensis DSM 15140T (96.8 % similarity), and the two strains formed a distinct branch in the phylogenetic tree. The level of DNA–DNA relatedness between the two strains was 15.6 %. The combination of phylogenetic analysis, phenotypic characteristics, chemotaxonomic differences and DNA–DNA hybridization data supported the view that strain YIM-C158T represents a novel species of the genus Paraliobacillus, for which the name Paraliobacillus quinghaiensis sp. nov. is proposed. The type strain is YIM-C158T (=DSM 17857T=CGMCC 1.6333T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM-C158T is EU135728.

A figure showing the polar lipid profile of strain YIM-C158T and a table giving the fatty acid compositions of strain YIM-C158T and related species are available as supplementary material with the online version of this paper.






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Copyright © 2009 by the International Union of Microbiological Societies.