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Int J Syst Evol Microbiol 59 (2009), 1321-1325; DOI  10.1099/ijs.0.005702-0
© 2009 International Union of Microbiological Societies

Pseudidiomarina donghaiensis sp. nov. and Pseudidiomarina maritima sp. nov., isolated from the East China Sea

Yue-Hong Wu1, Yu-Qiang Shen1, Xue-Wei Xu2,3, Chun-Sheng Wang2,3, Aharon Oren4 and Min Wu1

1 College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China
2 Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou 310012, PR China
3 Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, PR China
4 Institute of Life Sciences and the Moshe Shilo Minerva Center for Marine Biogeochemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel

Correspondence
Min Wu
wumin{at}zju.edu.cn

Two Gram-negative, aerobic, motile, rod-shaped bacteria, designated strains 908033T and 908087T, were isolated from a seawater sample collected from the East China Sea. Chemotaxonomic characteristics of the two isolates included the presence of iso-C15 : 0, iso-C17 : 0 and iso-C17 : 1{omega}9c as the major cellular fatty acids and Q-8 as the predominant ubiquinone. The genomic DNA G+C contents of strains 908033T and 908087T were 45.5 and 45.2 mol%, respectively. Phylogenetic analyses based on 16S rRNA gene sequences revealed that the new isolates were related to members of the genus Pseudidiomarina, showing levels of similarity of 95.8–96.6 % with the type strains of recognized species of the genus. The results of DNA–DNA hybridization experiments among these two isolates and Pseudidiomarina sediminum CICC 10319T, in combination with chemotaxonomic and phenotypic data, demonstrated that the new isolates represent two novel species of the genus Pseudidiomarina, for which the names Pseudidiomarina donghaiensis sp. nov. (type strain 908033T=CGMCC 1.7284T=JCM 15533T) and Pseudidiomarina maritima sp. nov. (type strain 908087T=CGMCC 1.7285T=JCM 15534T) are proposed.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains 908033T and 908087T are EU600204 and EU600203, respectively.

Transmission electron micrographs of cells of strains 908033T and 908087T, maximum-parsimony and maximum-likelihood phylogenetic trees based on 16S rRNA gene sequences, and a table giving the cellular fatty acid contents of strains 908033T and 908087T and related Pseudidiomarina species are available as supplementary material with the online version of this paper.






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