Two strictly aerobic, Gram-negative, rod-shaped bacteria containing photosynthesis-related genes, designated strains CL-SK44 and CL-JM1, were isolated from a culture of the marine phytoplankton sp. and coastal seawater from Korea, respectively. Phylogenetic analysis of 16S rRNA gene sequences revealed that the two strains were related to members of the genera (95.3–96.7 % similarity), (95.3–96.0 %) and (95.6 %) in the family . However, the two novel strains did not form a robust clade with any species of the clade, forming a distinct clade. The major polar lipids of the strains were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol, an unidentified aminolipid and an unidentified lipid, profiles that were distinguishable from those of the related genera examined. Although the level of 16S rRNA gene sequence similarity between strains CL-SK44 and CL-JM1 was very high (99.1 %), DNA–DNA relatedness between the strains was 13 %, suggesting that they represent genomically distinct species. In addition, the two strains could be differentiated based on the presence of a minor polar lipid, on the hydrolysis of gelatin and the utilization of carbon sources. Based on the data from the present study, strains CL-SK44 and CL-JM1 are considered to represent separate novel species of a new genus of the family , for which the names gen. nov., sp. nov. (type species) and sp. nov. are proposed. The type strains of and are CL-SK44 (=KCCM 90070=JCM 15447) and CL-JM1 (=KCCM 90071=JCM 15446), respectively.


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Cellular fatty acid composition of strains CL-SK44 , CL-JM1 and other phylogenetically related genera of the family . [ PDF] 117 KB


Two-dimensional TLC of the polar lipids of strains CL-SK44 (a) and CL-JM1 (b). [ PDF] 33 KB


Neighbour-joining tree derived from 16S rRNA gene sequences for strains CL-SK44 , CL-JM1 and most members in the family . [ PDF] 63 KB

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