Halomonas tibetensis sp. nov., isolated from saline lakes on Tibetan Plateau

Hui-bin Lu; Peng Xing; Lei Zhai; Dorji Phurbu; Qian Tang; Qing-long Wu

doi:10.1007/s12275-018-8076-5

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Halomonas tibetensis sp. nov., isolated from saline lakes on Tibetan Plateau: Hui-bin Lu ^1,2, Peng Xing ¹, Lei Zhai ³, Dorji Phurbu ⁴, Qian Tang ^1,2, Qing-long Wu ^1,5; Journal of Microbiology 2018;56(7):493-499.
DOI: https://doi.org/10.1007/s12275-018-8076-5
Published online: June 14, 2018

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

Corresponding author: Peng Xing , Tel: +86-25-86882112,

Received: 12 February 2018 • Revised: 19 April 2018 • Accepted: 8 May 2018

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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).

Keywords: Halomonas;saline lake;polyphasic taxonomy;Tibetan Plateau

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Halomonas tibetensis sp. nov., isolated from saline lakes on Tibetan Plateau

J. Microbiol. 2018;56(7):493-499. Published online June 14, 2018

DOI: https://doi.org/10.1007/s12275-018-8076-5

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