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Halorubrum litoreum sp. nov., an extremely halophilic archaeon from a solar saltern

¹ School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
² State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China

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

An extremely halophilic archaeon, strain Fa-1^T, was isolated from a marine solar saltern in Fujian, China. Strain Fa-1^T required Mg²⁺ and at least 2.0 M NaCl for growth. It was able to grow at pH 6.5–9.0 (optimally at pH 7.0–7.5) and at 20–55 °C (optimally at 37–42 °C). The major polar lipids of strain Fa-1^T were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and a sulfated diglycosyl diether. On the basis of a 16S rRNA gene sequence analysis, strain Fa-1^T was closely related to nine species of the genus Halorubrum, showing sequence similarities of 97.4–98.4 %. The G+C content of the DNA of strain Fa-1^T is 64.9 mol% (T_m). DNA–DNA hybridization values between strain Fa-1^T and the most closely related members of the genus Halorubrum were below 51 %. On the basis of the data from this study, strain Fa-1^T represents a novel species of the genus Halorubrum, for which the name Halorubrum litoreum sp. nov. is proposed. The type strain is Fa-1^T (=CGMCC 1.5336^T =JCM 13561^T).

Thin-layer chromatograms of the phospholipids of strain Fa-1^T and the glycolipids of strain Fa-1^T and members of the genus Halorubrum are available as supplementary material with the online version of this paper.

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