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Int J Syst Evol Microbiol 58 (2008), 1215-1220; DOI  10.1099/ijs.0.65588-0
© 2008 International Union of Microbiological Societies

Hymenobacter psychrotolerans sp. nov., isolated from the Qinghai--Tibet Plateau permafrost region

Gaosen Zhang1,2, Fujun Niu2, Hans-Jürgen Busse3, Xiaojun Ma1, Wei Liu1, Maoxing Dong1, Huyuan Feng1,2, Lizhe An1,2 and Guodong Cheng2

1 School of Life Sciences, Key Lab of Arid and Grassland Agroecology of MOE, Lanzhou University, Lanzhou 730000, PR China
2 State Key Lab of Frozen Soil and Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, PR China
3 Institut für Bakteriologie, Mykologie und Hygiene, Veterinärmedizinische Universität Wien, A-1210 Vienna, Austria

Correspondence
Huyuan Feng
fenghy{at}lzu.edu.cn
Lizhe An
lizhean{at}lzu.edu.cn

A psychrotolerant bacterium, designated strain Tibet-IIU11T, was isolated from the Qinghai--Tibet Plateau permafrost region, China. A taxonomic study was conducted using a polyphasic approach, with determination of physiological and biochemical properties and phylogenetic analysis based on 16S rRNA gene sequences. The novel isolate was found to belong to the genus Hymenobacter and was distinct from the recognized species of this genus. The major fatty acids were iso-C15 : 0 (24.5 %), summed feature 3 (C16 : 1{omega}7c and/or iso C15 : 0 2-OH; 20.0 %), summed feature 4 (iso-C17 : 1 I and/or anteiso-C17 : 1 B; 14.0 %), C16 : 1{omega}5c (12.7 %) and anteiso-C15 : 0 (8.4 %). Phosphatidylethanolamine and an unknown aminophospholipid were predominant in the polar lipid profile. The quinone system consisted exclusively of menaquinone MK-7 and sym-homospermidine was the major polyamine present. These chemotaxonomic traits are in good agreement with the characteristics of the genus Hymenobacter. The assignment of the novel isolate to this genus was further supported by a DNA G+C content of 60 mol%. On the basis of the polyphasic evidence presented in this study, it is proposed that strain Tibet-IIU11T (=DSM 18569T=CGMCC 1.6365T) represents a novel species, Hymenobacter psychrotolerans sp. nov.

Abbreviations: SEM, scanning electron microscopy/micrograph; TEM, transmission electron microscopy/micrograph

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain Tibet-IIU11T is DQ177475.






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