Vibrio hannami sp. nov., Isolated from Seawater

Abstract

A Gram-reaction negative, aerobic, motile, non-pigmented and rod-shaped bacterium, designated as 168GH5-2-16^T, was isolated from seawater Jeju island. Phylogenetic analysis based on 16S rRNA gene sequence comparison revealed that the strain formed a distinct lineage within the genus Vibrio and was most closely related to Vibrio variabilis R-40492^T (96.0%). The DNA G+C content was 49.3 mol%. The major polar lipids were phosphatidylethanolamine (PE) and phosphatidylglycerol (PG). The predominant quinone was ubiquinone-8 (Q-8). The major fatty acids were C_16:0, summed feature 3 (comprising C_16:1ω7c/C_16:1ω6c) and summed feature 8 (C_18:1ω7c/C_18:1ω6c) supported the affiliation of 168GH5-2-16^T to the genus Vibrio. Moreover, the physiological, biochemical, and taxonomic analysis allowed the phenotypic and genotypic differentiation of strain 168GH5-2-16^T from the recognized species of the genus Vibrio. Therefore, strain 168GH5-2-16^T represents a novel species of the genus Vibrio, for which the name Vibrio hannami sp. nov. is proposed, with the type strain 168GH5-2-16^T (=KACC 19277^T = DSM105032^T).

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