Photobacterium arenosum sp. nov., isolated from marine sediment sand.

A Gram-stain-negative, aerobic, motile, short rod-shaped, catalase-negative and oxidase-positive bacterium, strain CAU 1568 ^T , was isolated from marine sediment sand sampled at Sido Island in the Republic of Korea. The optimum conditions for growth were at 25-30 °C, at pH 6.5-8.5 and with 0-4.0 % (w/v) NaCl. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain CAU 1568 ^T was a member of the genus Photobacterium with high similarity to Photobacterium salinisoli JCM 30852 ^T (97.7 %), Photobacterium halotolerans KACC 17089 ^T (97.3 %) and Photobacterium galatheae LMG F28894 ^T (97.3 %). The predominant cellular fatty acids were C _16 : 0 , summed feature 3 (C _16 : 1  ω 6 c and/or C _16 : 1  ω 7 c ) and summed feature 8 (C _18 : 1  ω 7 c and/or C _18 : 1  ω 6 c ), with Q-8 as the major of isoprenoid quinone. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerols, phosphatidylcholine, phosphatidylethanolamine, phospholipid, two aminophospholipids and three unidentified lipids. The whole genome size of strain CAU 1568 ^T was 4.8 Mb with 50.1 mol% G+C content; including 38 contigs and 4233 protein-coding genes. These taxonomic data support CAU 1568 ^T as representing a novel Photobacterium species, for which the name Photobacterium arenosum sp. nov. is proposed. The type strain of this novel species is CAU 1568 ^T (=KCTC 82404 ^T =MCCC 1K05668 ^T ).