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Hymenobacter rigui sp. nov., isolated from wetland freshwater

¹ Department of Biology, College of Natural Sciences, Sunchon National University, Sunchon 540-742, Republic of Korea
² School of Biological Sciences and Institute of Microbiology, Seoul National University, NS70, 56-1 Shillim-dong, Kwanak-gu, Seoul 151-742, Republic of Korea

Correspondence
Jongsik Chun
jchun{at}snu.ac.kr

A non-motile, rod-shaped and pinkish-red-pigmented bacterium, designated strain WPCB131^T, was isolated from freshwater of Woopo wetland, Republic of Korea. Phylogenetic analysis based on 16S rRNA gene sequencing indicated that this isolate represents a novel member of the genus Hymenobacter with sequence similarities of 93.2–95.5 % to known Hymenobacter species. No other taxa in the phylum Bacteroidetes showed more than 90 % sequence similarity to the isolate. Cells were Gram-negative, oxidase-negative and catalase-positive. Optimum growth was observed at pH 6 and 30 °C. The major fatty acids were iso-C_{15 : 0} (34.8 %), C_{16 : 1}5c (15.0 %), anteiso-C_{17 : 1} B/iso-C_{17 : 1} I (14.4 %) and C_{16 : 1}7c/iso-C_{15 : 0} 2-OH (13.8 %). The DNA G+C content of strain WPCB131^T was 65 mol%. The isolate could be readily distinguished from other Hymenobacter species using a combination of phenotypic characters. On the basis of the polyphasic evidence presented in this study, it is proposed that strain WPCB131^T (=IMSNU 14116^T=KCTC 12533^T=NBRC 101118^T) represents a novel species, Hymenobacter rigui sp. nov.

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