Fluviimonas pallidilutea gen. nov., sp. nov., a new member of the family Cytophagaceae isolated from a freshwater river

Shih-Yi Sheu, Yu-Siang Chen, Yu-Wen Shiau, Wen-Ming Chen
International Journal of Systematic and Evolutionary Microbiology 2013, 63: 3861-7
A bacterial strain designated TQQ6(T) was isolated from a freshwater river in Taiwan and characterized using a polyphasic taxonomy approach. Cells of strain TQQ6(T) were strictly aerobic, Gram-staining-negative, poly-β-hydroxybutyrate-containing, non-motile, non-spore-forming, long rods surrounded by a thick capsule and forming pale orange colonies. Growth occurred at 20-40 °C (optimum, 25 °C), at pH 7.0-9.0 (optimum, pH 8.0) and with 0-0.5 % NaCl (optimum, 0 %). The predominant fatty acids were iso-C15 : 0, summed feature 3 (comprising C16 : 1ω6c and/or C16 : 1ω7c), iso-C17 : 0 3-OH, C16 : 1ω5c and C16 : 0. The major isoprenoid quinone was MK-7 and the DNA G+C content was 42.2 mol%. The polar lipid profile consisted of a mixture of phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylcholine, two uncharacterized aminophospholipids and three uncharacterized phospholipids. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain TQQ6(T) represents a distinct phyletic line that reflects a novel generic status within the family Cytophagaceae with relatively low sequence similarities (less than 90 %) to members of other genera with validly published names. On the basis of the genotypic and phenotypic data, strain TQQ6(T) represents a new genus and novel species of the family Cytophagaceae, for which the name Fluviimonas pallidilutea gen. nov., sp. nov. is proposed. The type strain is TQQ6(T) ( = BCRC 80447(T) = LMG 27056(T) = KCTC 32035(T)).

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