Edaphobaculum flavum gen. nov., sp. nov., a member of family Chitinophagaceae, isolated from grassland soil.

A yellow-coloured, Gram-stain-negative, non-motile, rod-shaped, strictly aerobic bacterium, designated 1-116, was isolated from Erdos grassland soil of Inner Mongolia, PR China. Phylogenetic analysis based on 16S rRNA genes showed that strain 1-116 was a member of family Chitinophagaceae and exhibited the highest similarities to Taibaiella koreensis THG-DT86 (90.1 %) and Flavihumibacter solisivae 3-3 (90.0 %), while the similarities to the other Chitinophagaceae type strains were lower than 90.0 %. Strain 1-116 grew at 16-33 °C (optimum 28 °C), pH 6.0-9.0 (optimum 7.0-8.0) and 0-0.5 % NaCl (w/v; optimum without NaCl). A flexirubin-type pigment was present. The DNA G+C content was 43.2 mol% and the only quinone present was menaquinone-7. The only polyamine detected was sym-homospermidine [30.7 µmol (g dry weight)] and the predominant fatty acids were iso-C15 : 0 (20.8 %), iso-C15 : 1 G (25.1 %), summed feature 4 (anteiso-C17 : 1 B and/or iso-C17 : 1 I; 13.8 %) and iso-C17 : 0 3-OH (13.2 %). The major polar lipids were phosphatidylethanolamine, three unidentified lipids, an unidentified aminophospholipid and an unidentified glycolipid. On the basis of the polyphasic analyses, strain 1-116 represents a novel genus and species in the family Chitinophagaceae, for which the name Edaphobaculum flavum gen. nov., sp. nov., is proposed. The type strain of Edaphobaculum flavum is 1-116 (=CCTCC AB 2017054=KCTC 52843).