| Title | Halomonas tibetensis sp. nov., isolated from saline lakes on Tibetan Plateau |
|---|---|
| Author | Hui-bin Lu1,2, Peng Xing1*, Lei Zhai3, Dorji Phurbu4, Qian Tang1,2, and Qing-long Wu1,5 |
| Address | 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China, 2University of Chinese Academy of Sciences, Beijing 100049, P. R. China, 3China Center of Industrial Culture Collection (CICC), China National Research, Institute of Food and Fermentation Industries, Beijing 100015, P. R. China, 4Tibet Plateau Institute of Biology, Lhasa 850000, P. R. China, 5Sino-Danish Centre for Education and Research, University of Chinese Academy of Sciences, Beijing 100049, P. R. China |
| Bibliography | Journal of Microbiology, 56(7),493–499, 2018, |
| DOI | 10.1007/s12275-018-8076-5 |
| Key Words | Halomonas, saline lake, polyphasic taxonomy, Tibetan Plateau |
| Abstract | Strains pyc13T and ZGT13 were isolated from Lake Pengyan and Lake Zigetang on Tibetan Plateau, respectively. Both strains were Gram-negative, catalase- and oxidase-positive, aerobic, rod-shaped, nonmotile, and nonflagellated bacteria. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains pyc13T and ZGT13 belong to the genus Halomonas, with Halomonas alkalicola 56-L4-10aEnT as their closest neighbor, showing 97.4% 16S rRNA gene sequence similarity. The predominant respiratory quinone of both strains was Q-9, with Q-8 as a minor component. The major fatty acids of both strains were C18:1 ω6c/C18:1 ω7c, C16:1 ω6c/C16:1 ω7c, C16:0, and C12:0 3OH. The polar lipids of both strains consisted of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, glycolipid, phospholipids of unknown structure containing glucosamine, and unidentified phospholipids. The DNA G + C content of pyc13T and ZGT13 were 62.6 and 63.4 mol%, respectively. The DNA-DNA hybridization values of strain pyc13T were 34, 41, 61, 35, and 35% with the reference strains H. alkalicola 56-L4-10aEnT, H. sediminicola CPS11T, H. mongoliensis Z-7009T, H. ventosae Al12T, and H. fontilapidosi 5CRT, respectively. Phenotypic, biochemical, genotypic, and DNA-DNA hybridization data showed that strains pyc13T and ZGT13 represent a new species within the genus Halomonas, for which the name H. tibetensis sp. nov. is proposed. The type strain is pyc13T (= CGMCC 1.15949T = KCTC 52660T). |