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Int J Syst Evol Microbiol 57 (2007), 738-740; DOI  10.1099/ijs.0.64651-0
© 2007 International Union of Microbiological Societies

Natronorubrum sulfidifaciens sp. nov., an extremely haloalkaliphilic archaeon isolated from Aiding salt lake in Xin-Jiang, China

Heng-Lin Cui1,2,3, Dilbr Tohty4, Hong-Can Liu1, Shuang-Jiang Liu1, Aharon Oren5 and Pei-Jin Zhou1

1 State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3 School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
4 College of Life Sciences, Xin-Jiang Normal University, Urumqi 830053, People's Republic of China
5 Institute of Life Sciences and the Moshe Shilo Minerva Center for Marine Biogeochemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel

Correspondence
Pei-Jin Zhou
zhou{at}sun.im.ac.cn

An extremely haloalkaliphilic archaeon, strain AD2T, was isolated from Aiding salt lake in Xin-Jiang, China. Strain AD2T required at least 12 % NaCl for growth. MgCl2 was not required. The isolate was able to grow over a pH range of 8.0–10.0 and temperature range of 20–55 °C, with optimal growth at pH 8.7–9.2 and 44–47 °C. The major polar lipids of strain AD2T were phosphatidylglycerol and phosphatidylglycerol phosphate methyl ester; glycolipids were not detected. Analysis of its 16S rRNA gene sequence indicated that strain AD2T was phylogenetically related to members of the genus Natronorubrum, with sequence similarities to the type strains of Natronorubrum bangense, Natronorubrum tibetense and Natronorubrum aibiense of 97.1, 95.9 and 96.1 %, respectively. The G+C content of its DNA was 60.9 mol% (Tm). Levels of DNA–DNA relatedness between strain AD2T and the type strains of Nrr. bangense, Nrr. tibetense and Nrr. aibiense were 49, 38 and 41 %, respectively. It was concluded that strain AD2T represents a novel species of the genus Natronorubrum, for which the name Natronorubrum sulfidifaciens sp. nov. is proposed. The type strain is AD2T (=CGMCC 1.6307T=JCM 14089T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain AD2T is DQ535889.

A two-dimensional thin-layer chromatogram of the phospholipids from strain AD2T is available as supplementary material in IJSEM Online.






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