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Int J Syst Evol Microbiol 59 (2009), 2264-2268; DOI  10.1099/ijs.0.008326-0
© 2009 International Union of Microbiological Societies

Hirschia maritima sp. nov., isolated from seawater

Hye Soon Kang and Soon Dong Lee

Department of Science Education, Cheju National University, Jeju 690-756, Republic of Korea

Correspondence
Soon Dong Lee
sdlee{at}cheju.ac.kr

A Gram-negative, aerobic, orange-coloured bacterium, designated strain GSW-2T, was isolated from seawater sampled at a beach and its taxonomic status was established by using a polyphasic approach. Vegetative cells produced a prostheca and reproduced by budding. Mature vegetative cells were spherical, oval- or rod-shaped (0.6–1.1x1.2–1.3 µm) and both vegetative cells and buds produced one or more flagella. Cells grew well at 30 °C and at pH 8.1–9.1, and produced a non-diffusible pigment. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain GSW-2T was most closely related to the type strain of Hirschia baltica (97.5 % similarity), a member of the family Hyphomonadaceae, class Alphaproteobacteria. Chemotaxonomic characteristics supported the assignment of strain GSW-2T to the genus Hirschia, including the dominant cellular fatty acids (summed feature 7 and C16 : 0), isoprenoid quinone (mainly Q-10) and DNA G+C content (44.5 mol%). Levels of DNA–DNA relatedness between strain GSW-2T and Hirschia baltica DSM 5838T were 8.8–13.6 %. On the basis of phenotypic features and DNA–DNA hybridization data, strain GSW-2T is considered to represent a novel species of the genus Hirschia, for which the name Hirschia maritima sp. nov. is proposed. The type strain is GSW-2T (=DSM 19733T=JCM 14974T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain GSW-2T is FM202386.






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