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Halomonas zhanjiangensis sp. nov., a halophilic bacterium isolated from a sea urchin

¹ College of Biology and Environmental Sciences, Jishou University, Jishou 416000, PR China
² 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
³ Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
⁴ Deutsche Sammlung von Mikroorganismen und Zellkulturen, D-38124 Braunschweig, Germany
⁵ 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
Yi-Guang Chen
mchenjsu{at}yahoo.com.cn

A novel Gram-negative, slightly halophilic, catalase-positive, oxidase-negative, obligately aerobic, non-sporulating rod-shaped bacterium, designated strain JSM 078169^T, was isolated from a sea urchin (Hemicentrotus pulcherrimus) collected from the South China Sea. Growth occurred with 1–20 % (w/v) total salts (optimum, 3–5 %), at pH 6.0–10.5 (optimum, pH 7.5) and at 4–40 °C (optimum, 25–30 °C). The major cellular fatty acids were C_{18 : 1}7c, C_{16 : 0} and C_{12 : 0} 3-OH. The predominant respiratory quinone was Q-9 and the genomic DNA G+C content was 55.8 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain JSM 078169^T should be assigned to the genus Halomonas. The sequence similarities between the isolate and the type strains of members of the genus Halomonas were in the range 92.4–97.0 %. The combination of phylogenetic analysis, DNA–DNA relatedness, phenotypic characteristics and chemotaxonomic data supported the view that strain JSM 078169^T represents a novel species of the genus Halomonas, for which the name Halomonas zhanjiangensis sp. nov. is proposed, with JSM 078169^T (=CCTCC AB 208031^T=DSM 21076^T=KCTC 22279^T) as the type strain.