International Journal of Systematic and Evolutionary Microbiology, Vol 52, 789-793, Copyright © 2002 by Society for General Microbiology

Salinicoccus alkaliphilus sp. nov., a novel alkaliphile and moderate halophile from Baer Soda Lake in Inner Mongolia Autonomous Region, China

W. Zhang, Y. Xue, Y. Ma, P. Zhou, A. Ventosa and W. D. Grant
Department of Microbial Physiology and Ecology, Institute of Microbiology, Chinese Academy of Sciences, Zhongguancun District, Beijing 100080, China

A novel alkaliphilic and moderately halophilic Gram-positive coccus, designated strain T8(T), was isolated from Baer Soda Lake in Inner Mongolia Autonomous Region, China. Strain T8(T) grew in the presence of 0--25% (w/v) NaCl and at pH 6.5--11.5, with optimum growth at 10% (w/v) NaCl and pH 9.0. It grew at 10.0--46.0 degrees C, with an optimum growth temperature of 32.0 degrees C. The organism was strictly aerobic, non-motile, non-sporulating and catalase- and oxidase-positive. The DNA G+C content was 49.6 mol%. The cell wall contained Lys and Gly. The major isoprenoid quinone was menaquinone 6 (MK-6). Phylogenetic analyses based on 16S rDNA sequence comparisons indicate that strain T8(T) is a member of the genus Salinicoccus. DNA--DNA relatedness of less than 50% with the described species of Salinicoccus supported the view that this organism represents a novel species of the genus Salinicoccus. The name Salinicoccus alkaliphilus sp. nov. is proposed for this novel species. The type strain is T8(T) (=AS 1.2691(T)=JCM 11311(T)).

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