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Niabella ginsengisoli sp. nov., isolated from soil cultivated with Korean ginseng

¹ Applied Microbiology Division, National Institute of Agricultural Science and Technology, Rural Development Administration (RDA), Suwon 441-707, Republic of Korea
² Korean Agricultural Culture Collection (KACC), Microbial Genetics Division, National Institute of Agricultural Biotechnology, RDA, Suwon 441-707, Republic of Korea

Correspondence
Soon-Wo Kwon
swkwon{at}rda.go.kr

The taxonomic status of a yellow- to light orange-coloured strain isolated from soil of a Korean ginseng field was established based on a polyphasic investigation. The novel isolate, strain GR10-1^T, was an obligately aerobic, Gram-staining-negative, non-motile, flexirubin-pigment-producing, short rod-shaped bacterium. The strain grew optimally at 28–30 °C, at pH 7.0 and in the presence of 0–1 % NaCl. Phylogenetic analyses based on 16S rRNA gene sequences demonstrated that the new isolate showed the highest sequence similarities with Niabella aurantiaca R2A15-11^T (95.1 %) and Niabella soli JS13-8^T (94.6 %). The DNA G+C content of strain GR10-1^T was 43 mol%. It contained iso-C_{15 : 1} G (36.4 %) and iso-C_{15 : 0} (32.8 %) as the major fatty acids (>10 %) and MK-7 as the major isoprenoid quinone. On the basis of evidence from our polyphasic taxonomic study, it was concluded that strain GR10-1^T should be classified within a novel species of the genus Niabella, for which the name Niabella ginsengisoli sp. nov. is proposed. The type strain is GR10-1^T (=KACC 13021^T =JCM 15444^T).

A table listing additional differentiating phenotypic characteristics between Niabella species and an electron micrograph of cells of strain GR10-1^T are available as supplementary material with the online version of this paper.