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Int J Syst Evol Microbiol 58 (2008), 2036-2040; DOI  10.1099/ijs.0.65519-0
© 2008 International Union of Microbiological Societies

Microbulbifer halophilus sp. nov., a moderately halophilic bacterium from north-west China

Shu-Kun Tang1,{dagger}, Yun Wang2,{dagger}, Man Cai1, Kai Lou2, Pei-Hong Mao3, Xiang Jin3, Cheng-Lin Jiang1, Li-Hua Xu1 and Wen-Jun Li1,4

1 The Key Laboratory for Microbial Resources of the Ministry of Education, PR China, and Laboratory for Conservation and Utilization of Bio-resources, Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, PR China
2 Xinjiang Institute of Microbiology, Xinjiang Academy of Agricultural Science, Urumqi, Xinjiang 830091, PR China
3 Institute of Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830008, PR China
4 Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China

Correspondence
Wen-Jun Li
wjli{at}ynu.edu.cn
or
liact{at}hotmail.com

A Gram-negative, rod-shaped, moderately halophilic bacterium, designated strain YIM 91118T, motile with a single polar flagellum, was isolated from Xinjiang province in north-west China and subjected to a polyphasic taxonomic study. Strain YIM 91118T grew optimally at 37 °C, pH 7.0–8.0 and 10 % NaCl (w/v). Its major cellular fatty acids were iso-C15 : 0, iso-C17 : 0, C16 : 0 and iso-C17 : 1{omega}9c. The predominant lipoquinone was Q-8. The DNA G+C content was 63.2 mol%. All of these chemotaxonomic data supported the assignment of the new isolate to the genus Microbulbifer. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain YIM 91118T belongs to the genus Microbulbifer and it formed a distinct subclade with Microbulbifer maritimus KCCM 41774T. The levels of 16S rRNA gene sequence similarity to the type strains of Microbulbifer species were in the range 93.5–95.0 %. The mean level of DNA–DNA relatedness between strain YIM 91118T and M. maritimus KCCM 41774T was 45.8 %. On the basis of phenotypic properties, phylogeny and genomic data, strain YIM 91118T represents a novel species of the genus Microbulbifer, for which the name Microbulbifer halophilus sp. nov. is proposed. The type strain is YIM 91118T (=CCTCC AB 206094T =KCTC 12848T). Furthermore, it is necessary to emend the description of the genus Microbulbifer.

{dagger}These authors contributed equally to this work.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 91118T is EF674853.

A transmission electron micrograph of a cell of strain YIM 91118T is available as supplementary material with the online version of this paper.






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