Limibaculum halophilum gen. nov., sp nov., a new member of the family Rhodobacteraceae

초록

A Gram-stain-negative, cream-pigmented, aerobic, non-motile, non-spore-forming and short-rod-shaped bacterial strain, designated CAU 1123(T), was isolated from mud from reclaimed land. The strain's taxonomic position was investigated by using a polyphasic approach. Strain CAU 1123(T) grew optimally at 37 degrees C and at pH 7.5 in the presence of 2% (w/v) NaCl. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that strain CAU 1123(T) formed a monophyletic lineage within the family Rhodobacteraceae with 93.8% or lower sequence similarity to representatives of the genera Rubrimonas, Oceanicella, Pleomorphobacterium, Rhodovulum and Albimonas. The major fatty acids were C-18 : 1 omega 7c and 11-methyl C-18 : 1 omega 7c and the predominant respiratory quinone was Q-10. The polar lipids were phosphatidylethanolamine, phosphatidylglycerol, two unidentified phospholipids, one unidentified aminolipid and one unidentified lipid. The DNA G+C content was 71.1 mol%. Based on the data from phenotypic, chemotaxonomic and phylogenetic studies, it is proposed that strain CAU 1123(T) represents a novel genus and novel species of the family Rhodobacteraceae, for which the name Limibaculumhalophilum gen. nov., sp. nov. The type strain is CAU 1123(T) (=KCTC 52187(T), =NBRC 112522(T)).

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