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Int J Syst Evol Microbiol 58 (2008), 1463-1466; DOI  10.1099/ijs.0.65690-0
© 2008 International Union of Microbiological Societies

Marinobacter psychrophilus sp. nov., a psychrophilic bacterium isolated from the Arctic

De-Chao Zhang1, Hui-Rong Li2, Yu-Hua Xin3, Zhen-Ming Chi1, Pei-Jin Zhou3 and Yong Yu2

1 UNESCO Chinese Center of Marine Biotechnology, Ocean University of China, Qingdao 266003, PR China
2 SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
3 China General Microbiological Culture Collection Center and State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China

Correspondence
Yong Yu
yuyong{at}pric.gov.cn

Strain 20041T was isolated from sea-ice of the Canadian Basin (7 ° 23' 14'' N 14 ° 06' 55'' W). Phylogenetic analysis based on 16S rRNA gene homology showed that strain 20041T was related to members of the genus Marinobacter and had highest 16S rRNA gene sequence similarity with the type strain of Marinobacter maritimus. Cells were Gram-negative, rod-shaped, psychrophilic and motile. The temperature range for growth was 0–22 °C, with optimum growth occurring at 16–18 °C and at approximately pH 6.0–9.0. Strain 20041T had ubiquinone-9 as the major respiratory quinone and iso-C15 : 0 2OH and/or C16 : 1{omega}7c, C16 : 0, C18 : 1{omega}9c and C12 : 0 3OH as major fatty acids. The genomic DNA G+C content was 55.4 mol%. On the basis of the phenotypic characteristics, phylogenetic analysis and DNA–DNA relatedness data, strain 20041T is considered to represent a novel species, for which the name Marinobacter psychrophilus sp. nov. is proposed. The type strain is 20041T (=CGMCC 1.6499T=JCM 14643T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Marinobacter psychrophilus 20041T is DQ060402.

The fatty acid profiles of strain 20041T and recognized Marinobacter species are available as supplementary material with the online version of this paper.






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