Algibacter undariae sp. nov., isolated from a brown algae reservoir

Sooyeon Park, Jung-Sook Lee, Keun-chul Lee, Jung-Hoon Yoon
International Journal of Systematic and Evolutionary Microbiology 2013, 63: 3704-9
A Gram-stain-negative, non-flagellated, rod-shaped bacterial strain able to move by gliding, designated WS-MY9(T), was isolated from a brown algae reservoir in South Korea. Strain WS-MY9(T) grew optimally at 25 °C, at pH 7.0-8.0 and in the presence of 2 % (w/v) NaCl. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain WS-MY9(T) clustered with the type strain of Algibacter lectus with a bootstrap resampling value of 100 %. Strain WS-MY9(T) exhibited 16S rRNA gene sequence similarity values of 98.5 and 96.7 % to the type strains of A. lectus and Algibacter mikhailovii, respectively, and less than 96.1 % sequence similarity to other members of the family Flavobacteriaceae. Strain WS-MY9(T) contained MK-6 as the predominant menaquinone and anteiso-C15 : 0, iso-C17 : 0 3-OH, iso-C15 : 1 G and iso-C15 : 0 as the major fatty acids. The major polar lipids of strain WS-MY9(T) were phosphatidylethanolamine and two unidentified lipids. The DNA G+C content of strain WS-MY9(T) was 35.0 mol% and its DNA-DNA relatedness value with A. lectus KCTC 12103(T) was 15 %. The phylogenetic and genetic distinctiveness and differential phenotypic properties revealed that strain WS-MY9(T) is separate from the two recognized species of the genus Algibacter. On the basis of the data presented, strain WS-MY9(T) represents a novel species of the genus Algibacter, for which the name Algibacter undariae sp. nov. is proposed. The type strain is WS-MY9(T) ( = KCTC 32259(T) = CCUG 63684(T)).

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