A Gram-negative, psychrotolerant, chemoheterotrophic, aerobic, cream-coloured bacterium, designated IMCC3113, was isolated from coastal seawater from the Antarctic. On the basis of 16S rRNA gene sequence similarity analyses, the strain was most closely related to the type strains of (93.0 %) and (92.1 %) in the . Phylogenetic investigations using 16S rRNA gene sequences showed that this Antarctic marine isolate formed a robust monophyletic clade with the two species but constituted a distinct phyletic line in the clade. The DNA G+C content of strain IMCC3113 was 56.4 mol% and the major respiratory quinone was Q-9. Several phenotypic and physiological characteristics, including the temperature range and NaCl optimum for growth, several enzyme activities and the cellular fatty acid composition, served to differentiate the strain from the two species. Therefore strain IMCC3113 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is IMCC3113 (=KCCM 42675 =NBRC 102683).


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vol. , part 2, pp. 353 - 356

Transmission electron micrographs of cells of strain IMCC3113 showing cell division and irregularly shaped rods and intracellular granules. [PDF](290 KB)


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