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Hydrogenophaga bisanensis sp. nov., isolated from wastewater of a textile dye works

¹ Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Republic of Korea
² Division of Applied Life Science, EB-NCRC, PMBBRC, Gyeongsang National University, Jinju 660-701, Republic of Korea

Correspondence
Jung-Hoon Yoon
jhyoon{at}kribb.re.kr

A Gram-negative, non-spore-forming, rod-shaped, Hydrogenophaga-like bacterial strain, K102^T, was isolated from wastewater collected from a textile dye works in Korea and subjected to a polyphasic taxonomic study. Strain K102^T grew optimally at pH 7.0–8.0 and 30–37 °C in the presence of 0.5 % (w/v) NaCl. It contained Q-8 as the predominant ubiquinone and C_{16 : 0}, C_{16 : 1}7c and/or iso-C_{15 : 0} 2-OH and C_{18 : 1}7c as the major fatty acids. The DNA G+C content was 64.8 mol%. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain K102^T fell within the radiation of the cluster comprising species of the genus Hydrogenophaga. Strain K102^T exhibited 16S rRNA gene sequence similarity values of 95.9–98.9 % to the type strains of recognized Hydrogenophaga species. Levels of DNA–DNA relatedness between strain K102^T and the type strains of its four phylogenetically most closely related species, together with differential phenotypic properties, revealed that strain K102^T could be distinguished from all recognized species of the genus Hydrogenophaga. On the basis of phenotypic, phylogenetic and genetic data, strain K102^T is considered to represent a novel species of the genus Hydrogenophaga, for which the name Hydrogenophaga bisanensis sp. nov. is proposed. The type strain is K102^T (=KCTC 12980^T =CCUG 54518^T).

A table detailing the cellular fatty acid compositions of strain K102^T and the type strains of recognized species of the genus Hydrogenophaga is available as supplementary material with the online version of this paper.