Flavobacterium suaedae sp nov., an endophyte isolated from the root of Suaeda corniculata

A Gram-stain-negative, non-motile, yellow, endophytic bacterium, designated G16-7(T), was isolated from the root of Suaeda corniculata in Inner Mongolia, northern China. Phylogenetic analysis, based on the 16S rRNA gene, revealed that strain G16-7(T) belonged to the genus Flavobacterium, with highest sequence similarities to Flavobacterium rakeshii FCS-5(T), Flavobacterium suzhouense XIN-1(T), Flavobacterium beibuense F44-8(T), Flavobacterium hauense BX12(T) and Flavobacterium shanxiense YF-2, ranging from 92.7% to 94.9%. The predominant fatty acids of strain G16-7(T) were iso-C-15 : 0, summed feature 3 (consisting of C-16 : 1 omega 7c and/or C-16: 1 omega 6c), iso-C-17: 0 3-OH and summed feature 9 (consisting of iso-C-17: 1 omega 9c and/or C-16 : 0 10-methyl), while MK-6 was the major respiratory quinone. The major polar lipids were phosphatidylethanolamine, an unknown phospholipid, an unknown aminophospholipid, four unknown aminolipids and three unknown lipids. The genomic DNA G+C content of the strain was 34.2 mol%. Based on the phenotypic and genotypic characteristics, strain G16-7(T) is considered to represent a novel species of the genus Flavobacterium, for which the name Flavobacterium suaedae sp. nov. is proposed. The type strain is G16-7(T) (=CGMCC 1.15461(T) =KCTC 42947(T)).