Description of leucobacter holotrichiae sp. nov., isolated from the gut of Holotrichia oblita larvae

Abstract

A Gram-stain-positive bacterium, designated T14T, was isolated from the gut of Holotrichia oblita larvae and was subjected to a taxonomic study. The isolate was rod-shaped, aerobic, non-motile, non-spore-forming and yellow-pigmented. Phylogenetic analysis based on 16S rRNA gene sequence comparison indicated that the isolate is related to the genus Leucobacter. Its closest neighbours were the type strains ‘Leucobacter kyeonggiensis’ F3-P9 (96.8 % 16S rRNA gene sequence similarity), Leucobacter celer NAL101T (96.2 %) and Leucobacter chironomi DSM 19883T (95.5 %). The DNA G+C content of strain T14T was 69.3 mol%, and DNA-DNA hybridization values with closely related strains were,<32 %. The predominant cellular fatty acids were anteiso-C15: 0 (49.3 %), iso-C16: 0 (16.4 %) and anteiso-C17: 0 (16.8 %). The major polar lipids were aminolipid, diphosphatidylglycerol, phosphatidylglycerol, phospholipid, phosphoglycolipid and unidentified glycolipids. The predominant respiratory quinone was MK-11. Based on these phylogenetic and phenotypic results, strain T14T can be clearly distinguished from all of the recognized species of the genus Leucobacter and is considered to represent a novel species of the genus Leucobacter. The name Leucobacter holotrichiae sp. nov. is proposed, with the type strain T14T (=DSM 28968T=JCM 30245T).