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

Abstract

An orange-coloured bacterial strain, designated R2A15-11T, 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 (0.7–0.9×1.0–1.5 μm) and produced flexirubin. Growth of the strain was observed at 10–35 °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-C15 : 0, iso-C15 : 1 G, iso-C17 : 0 3-OH and summed feature 3 (comprising iso-C15 : 0 2-OH and/or C16 : 1 ω7c). The genomic DNA G+C content was 45.0 mol%. Phylogenetic analysis of the 16S rRNA gene sequence of strain R2A15-11T revealed a clear affiliation with the phylum Bacteroidetes, and the highest levels of sequence similarity were found with respect to Terrimonas ferruginea ATCC 13524T (91.5 %), Terrimonas lutea DYT (90.2 %), Niastella yeongjuensis GR20-13T (89.9 %) and Niastella koreensis GR20-10T (89.7 %). On the basis of the polyphasic evidence from this study, strain R2A15-11T 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 R2A15-11T (=KACC 11698T=DSM 17617T).