Open AccessFlavobacterium tibetense sp. nov., isolated from a wetland
Author(s) -
Dorji Phurbu,
Huixiong Lü,
XiaoFeng Xue,
Yanling Tian,
Pema Yangzom,
Chao Ma,
Peng Xing
Publication year - 2019
Publication title -
international journal of systematic and evolutionary microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 173
eISSN - 1466-5034
pISSN - 1466-5026
DOI - 10.1099/ijsem.0.003124
Subject(s) - biology , 16s ribosomal rna , flavobacterium , strain (injury) , microbiology and biotechnology , phylogenetic tree , bacteria , genome size , chemotaxonomy , phylogenetics , ribosomal rna , genome , gene , botany , taxonomy (biology) , biochemistry , genetics , pseudomonas , anatomy
A novel, Gram-stain-negative, non-motile and rod-shaped bacterium, designated YH5 T , was isolated from the YonghuCo wetland on the Tibetan Plateau. The strain was able to grow optimally with 1 % (w/v) NaCl and tolerated up to 3 % NaCl. Growth occurred at pH 6-9 (optimum pH 7) and 10-37 °C (optimum 30 °C). Vitamins were not required for growth. The major polar lipid of strain YH5 T was phosphatidylethanolamine. The predominant respiratory quinone was menaquinone 6 (MK-6). The major fatty acids were iso-C15 : 0, C16 : 0 10-methyl and/or iso-C17 : 1ω9c, iso-C17 : 0 3-OH, iso-C15 : 1 G and iso-C15 : 0 3-OH. Genome sequencing revealed a genome size of 2.74 Mbp and a G+C content of 33.3 mol%. Analysis of 16S rRNA gene sequences showed that strain YH5 T belonged to the genus Flavobacterium, with the closest neighbours Flavobacterium luticocti xz20 T (96.7 % similarity), Flavobacterium jejuense EC11 T (96.4 %), Flavobacterium jumunjinense HME7102 T (95.9 %) and Flavobacterium dongtanense LW30 T (95.6 %). DNA-DNA relatedness between strain YH5 T and the closest phylogenetically related strain F. luticocti xz20 T was 27.0 %. Strain YH5 T was clearly distinguished from the reference type strains based on phylogenetic analysis, DNA-DNA hybridization, fatty acid composition and a range of physiological and biochemical characteristics. Based on its phenotypic and chemotaxonomic characteristics, strain YH5 T is classified as a representative of a novel species of the genus Flavobacterium, for which the name Flavobacterium tibetense sp. nov. is proposed. The type strain is YH5 T (=CICC 24247 T =KCTC 62174 T ).