Winogradskyella aurantia sp. nov., isolated from a marine solar saltern.

A Gram-stain negative, non-flagellated, facultatively anaerobic, slightly halophilic bacterium, WNB302T , was isolated from a marine solar saltern in Wendeng, China (122°0'38.85″E, 36°57'56.49″N). Cells of strain WNB302T were 0.2-0.7 µm wide and 2.0-10.0 µm long, catalase- positive and oxidase-negative. Colonies were opaque, orange and approximately 1.0-2.0 mm in diameter after culture for 96 h on marine agar 2216. Growth occurs at 15-37 °C (optimum, 33-35 °C), pH 6.0-8.5 (optimum, pH 7.0-7.5), and with 0.5-7% NaCl (optimum, 2-3% NaCl). Phylogenetic analysis based on 16S rRNA gene sequences showed that strain WNB302T belongs to the genus Winogradskyella and is closely related to Winogradskyella exilis KCTC 32356T . Strain WNB302T exhibited 96.2 and 96.0% 16S rRNA gene sequence similarities with W. exilis KCTC 32356T and W. litoriviva KCTC 23972T . Average nucleotide identity (ANI) value based on draft genomes between strain WNB302T and Winogradskyella thalassocola KCTC 12221T showed a relatedness of 81.1% (with 93.7% of 16S rRNA gene sequence similarity). The major respiratory quinone of strain WNB302T was found to be MK-6, and the dominant fatty acids were found to be iso-C15:0 and iso-C15:1 G. The major polar lipids of strain WNB302T were three unidentified lipids (L1, L2 and L3), one unidentified aminolipids (AL1) and phosphatidylethanolamine (PE). The genomic DNA G+C content was 37.0 mol%. On the basis of the data presented, strain WNB302T is considered to represent a novel species of the genus Winogradskyella, for which the name Winogradskyella aurantia sp. nov. is proposed. The type strain is WNB302T (= KCTC 52614T  = MCCC 1H00172T ).