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Sejongia marina sp. nov., isolated from Antarctic seawater

¹ Division of Biology and Ocean Sciences, Inha University, Yonghyun-Dong, Incheon 402-751, Republic of Korea
² Polar BioCenter, Korea Polar Research Institute, KOPRI, Songdo Techno Park, Incheon 406-840, Republic of Korea

Correspondence
Jang-Cheon Cho
chojc{at}inha.ac.kr

A Gram-negative, psychrotolerant, chemoheterotrophic, aerobic, non-gliding, non-motile, yellow-pigmented bacterium, designated IMCC3228^T, was isolated from coastal seawater of the Antarctic. On the basis of 16S rRNA gene sequence comparisons, the strain was most closely related to the genera Sejongia (95.3–96.1 %) and Chryseobacterium (94.2–95.9 %) in the family Flavobacteriaceae. Phylogenetic trees generated using several treeing algorithms based on 16S rRNA gene sequences showed that this Antarctic marine isolate formed a distinct phyletic line within the genus Sejongia. The DNA G+C content of the strain was 35.0 mol% and the major respiratory quinone was MK-6. Several phenotypic and chemotaxonomic characteristics, including temperature and NaCl optima for growth, oxidase activity and the proportions of major cellular fatty acids, served to differentiate the strain from the recognized species of the genus Sejongia. Therefore strain IMCC3228^T represents a novel species of the genus Sejongia, for which the name Sejongia marina sp. nov. is proposed. The type strain is IMCC3228^T (=KCCM 42689^T=NBRC 103143^T).

Transmission electron micrographs of cells of strain IMCC3228^T are available as a supplementary figure with the online version of this paper.

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