Thermomonas paludicola sp. nov., isolated from a lotus wetland.

Abstract

A Gram-stain-negative, aerobic, rod-shaped and motile bacterium, designated IMCC34681T, was isolated from a lotus wetland in the Republic of Korea. Cellular growth occurred at 10-37 °C (optimum, 30 °C), pH 6-9 (optimum, pH 7) and with 0-2 % (w/v) NaCl (optimum, 0.5 % NaCl). The results of 16S rRNA gene sequence analysis indicated that IMCC34681T represented a member of the genus Thermomonas, sharing 95.3-96.9 % similarities with type strains of species of the genus. The whole-genome sequence of IMCC34681T was 2.72 Mbp in size with 66.2 % DNA G+C content. The IMCC34681T genome shared the highest average nucleotide identity (ANI) value, 82.8 %, with that of Thermomonas brevis KACC 16975T among species of the genus Thermomonas, indicating that the strain represents a novel genomic species. The major respiratory quinone of the strain was ubiquinone-8 (Q-8) and the predominant cellular fatty acids were iso-C15 : 0 (25.7 %) and iso-C14 : 0 (20.8 %). The strain harboured diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and an unidentified lipid as major fatty polar lipids. On the basis of the phylogenetic, phenotypic, chemotaxonomic and genomic characteristics, IMCC34681T was assigned to the genus Thermomonas as the type strain of a novel species, for which the name Thermomonas paludicola sp. nov. is proposed. The type strain is IMCC34681T (=KACC 21793T=NBRC 114635T).