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Halorubrum lipolyticum sp. nov. and Halorubrum aidingense sp. nov., isolated from two salt lakes in Xin-Jiang, China

¹ State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, ZhongGuanCun, Haidian, Beijing 100080, People's Republic of China
² Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
³ College of Life Sciences, Xin-Jiang Normal University, Urumqi 830053, People's Republic of China

Correspondence
Shuang-Jiang Liu
liusj{at}sun.im.ac.cn

Two extremely halophilic archaea, strains 9-3^T and 31-hong^T, were isolated from Aibi salt lake and Aiding salt lake in Xin-Jiang, China. Their morphology, physiology, biochemical features, polar lipid compositions and 16S rRNA gene sequences were characterized in order to elucidate their taxonomic status. The results from this study indicated that strains 9-3^T and 31-hong^T are members of the genus Halorubrum. Their physiological properties and polar lipid compositions are clearly different from those of the currently described species of Halorubrum. DNA–DNA relatedness values for strain 9-3^T with respect to its closely related neighbours Halorubrum saccharovorum JCM 8865^T and Halorubrum lacusprofundi JCM 8891^T were 51.6 and 25.1 %, respectively, DNA–DNA relatedness values for strain 31-hong^T with respect to its closely related neighbours Hrr. saccharovorum JCM 8865^T and Hrr. lacusprofundi JCM 8891^T were 29.4 and 44.9 %, respectively, and DNA–DNA relatedness between strains 9-3^T and 31-hong^T was 54 %. Thus, two novel species of the genus Halorubrum are proposed, Halorubrum lipolyticum sp. nov. (type strain 9-3^T=CGMCC 1.5332^T=JCM 13559^T) and Halorubrum aidingense sp. nov. (type strain 31-hong^T=CGMCC 1.2670^T=JCM 13560^T).

A thin-layer chromatogram showing the glycolipids/phospholipids of strains 9-3^T and 31-hong^T and members of the genus Halorubrum is available as a supplementary figure in IJSEM Online.

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