Niabella aurantiaca gen. nov., sp nov., isolated from a greenhouse soil in Korea

An orange-coloured bacterial strain, designated R2A15-11(T), was isolated from greenhouse soil. The strain was found to be strictly aerobic, Gram-negative, non-spore-forming and non-flagellated. The cells were short rods (0.7-0.9 x 1.0-1.5 mu m) and produced flexirubin. Growth of the strain was observed at 10-35 degrees C, pH 5.0-8.0 and 0-3% (w/v) NaCl. The predominant isoprenoid quinone was MK-7. The major fatty acids were iSO-C-15:0, iso-C-15:1 G, iSO-C-17:0 3-OH and slimmed feature 3 (comprising iso-C-15:0 2-OH and/or C(16:1)w7c). The genomic DNA G + C content was 45.0 mol%. Phylogenetic analysis of the 16S rRNA gene sequence of strain R2A15-11(T) revealed a clear affiliation with the phylum Bacteroidetes, and the highest levels of sequence similarity were found with respect to Terrimonas ferruginea ATCC 13524(T) (91.5%), Terrimonas lutea DYT (90.2 %), Niastella yeongjuensis GR20-13(T) (89.9%) and Niastella koreensis GR20-10(T) (89.7 %). On the basis of the polyphasic evidence from this study, strain R2A15-11(T) represents a novel genus and species, for which the name Niabella aurantiaca gen. nov., sp. nov. is proposed. The type strain of Niabella aurantiaca is R2A15-11(T) (=KACC 11698(T) =DSM 17617(T)).