Flavobacterium alkalisoli sp. nov., isolated from rhizosphere soil of Suaeda salsa

A Gram-negative, strictly aerobic, gliding motility, none-spore forming, yellow, rods bacterial strain, designated XS-5(T), was iso-lated from rhizosphere soil of Suaeda salsa, in Tumd Right Banner, Inner Mongolia, PR China. A phylogenetic tree based on the 16S rRNA gene sequences and the phylogenomic tree both showed that strain XS-5(T) clustered with Flavobacterium beibuense F44-8(T) (shared 97.2 % of 16S rRNA gene similarity) and Flavobacterium rakeshii FCS-5T (97.6 %), and shared <96.0 % of 16S rRNA gene similarities with all other type strains. Strain XS-5T contained MK-6 as the major respiratory quinone. Its major polar lipids were phosphatidylethanolamine, an unidentified aminolipid and an unidentified lipid; and the major fatty acids were iso-C-15:0, iso-C-17: 0 3-OH, C-16:0, iso-C-15: 0 3-OH, Summed feature 3 (iso-C-15: 0 2-OH and/or C-16: 1 omega 7c), and Summed feature 9 (iso-C17: 1 omega 9c and/or C-16: 0 10-methyl). The genome consisted of a 3 985 855 bp circular chromosome, with a G+C content of 37.9 mol%, predicting 3616 coding sequences genes, 45 tRNA genes and three rRNA operons. The average nucleotide identity, amino acid identity and digital DNA-DNA hybridization values of strain XS-5(T) to F. beibuense F44-8(T) and F. rakeshii FCS-5(T) were 79.2 and 79.2 %, 81.7 and 81.6 %, 22.3 and 22.2 %, respectively. The results of phylogenetic, physiological and biochemical tests allowed the discrimi-nation of strain XS-5(T) from its phylogenetic relatives. Flavobacterium alkalisoli sp. nov. is therefore proposed with strain XS-5(T) (=CGMCC 1.17077(T)=KCTC 72459(T)) as the type strain.