Ulvibacter marinus sp. nov., isolated from coastal seawater

Abstract

A Gram-stain-negative, aerobic, chemoheterotrophic, yellow, non-motile and flexirubin-positive bacterium, designated strain IMCC12008T, was isolated from coastal seawater of the Yellow Sea and subjected to polyphasic taxonomy. Optimal growth was observed at 25 °C, pH 7.0 and in the presence of 2 % (w/v) NaCl. Based on 16S rRNA gene sequence analysis and subsequent phylogenetic analyses, strain IMCC12008T belonged to the genus Ulvibacter of the family Flavobacteriaceae , with Ulvibacter antarcticus IMCC3101T (96.0 %) and Ulvibacter litoralis KMM 3912T (95.8 %) having the highest sequence similaries. The major fatty acids were iso-C15 : 0 (26.2 %) and iso-C15 : 1 G (10.5 %). The DNA G+C content was 38.1 mol%. Strain IMCC12008T contained menaquinone-6 (MK-6) as the respiratory quinone, and polar lipids comprising phosphatidylethanolamine, two unidentified aminolipids and an unknown aminophospholipid. On the basis of data collected from this study, strain IMCC12008T ( = NBRC 109484T = KCTC 32322T) represents a novel species of the genus Ulvibacter , for which the name Ulvibacter marinus sp. nov. is proposed.