Flavihumibacter solisp. nov., Isolated from Soil

초록

A novel Gram-stain-positive, strictly aerobic, non-motile, rod-shaped bacterium, designated strain R14T was isolated from steep grove soil and taxonomically characterized using a polyphasic approach. Cells showed oxidase-negative and catalase-positive activities and grew at 25-37 degrees C (optimum, 30 degrees C), pH 5.0-8.0 (optimum, pH 6.5), and in the presence of 0-0.5% (w/v) NaCl (optimum, 0%). Phylogenetic trees based on 16S rRNA gene sequences revealed that strain R14T formed a phylogenetic lineage withFlavihumibactergenus members within the family Chitinophagaceae. Comparison of 16S rRNA gene sequences showed that strain R14T shared highest similarities withFlavihumibacter solisilvae3-3T (97.5%),Flavihumibacter petaseusNBRC 106054T (96.7%), andFlavihumibacter stibioxidansYS-17T (96.1%). The G+C content of strain R14T calculated from its whole genome sequence was 44.6 mol%. Strain R14T contained menaquinone-7 and iso-C-15:0, iso-C(17:0)3-OH, C-16:0, C-15:1 omega 6c, and iso-C-15:0-G as the sole respiratory isoprenoid quinone and major cellular fatty acids, respectively. Major polar lipids consisted of phosphatidylethanolamine, two unidentified aminolipids, and four unidentified lipids. Based on phylogenetic, phenotypic, and chemotaxonomic characteristics of strain R14T, it could be concluded that strain R14T represents a novel species of the genusFlavihumibacter, for which the nameFlavihumibacter solisp. nov. is proposed. The type strain is R14T (=KACC 21229T = JCM 33473T).

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