A bacterial strain designated LSN-49T was isolated from a brackish river in Taiwan and characterized using a polyphasic taxonomy approach. Cells of strain LSN-49T were Gram-staining-negative, aerobic, poly-β-hydroxybutyrate accumulating, motile by means of a monopolar flagellum, non-spore forming, straight rods and formed shiny and translucent colonies. Growth occurred at 20-40 °C (optimum, 25-30 °C), at pH 6-10 (optimum, pH 7-8) and with 0-3 % (w/v) NaCl [optimum, 0-1 % (w/v)]. The predominant fatty acids were summed feature 3 (comprising C16 : 1ω7c and/or C16 : 1ω6c), C17 : 1ω8c and C16 : 0. The polar lipid profile consisted of a mixture of phosphatidylethanolamine (PE), phosphatidylglycerol (PG), phosphatidylcholine, (PC), two uncharacterized aminophospholipids (APL1 and APL2), one uncharacterized glycolipid (GL1), four uncharacterized phospholipids (PL1-PL4) and four uncharacterized lipids (L1-L4). The major polyamine was putrescine. The major isoprenoid quinone was Q-8 and the DNA G+C content was 51.0 mol%. The results of phylogenetic analyses based on 16S rRNA gene sequences indicated that LSN-49T formed a distinct lineage with respect to closely related genera in the family Pseudoalteromonadaceae. LSN-49T was most closely related to Pseudoalteromonas, Algicola and Psychrosphaera and showed 89.3-92.1 % sequence similarity with members of the family Pseudoalteromonadaceae with validly published names. On the basis of the genotypic and phenotypic data, LSN-49T represents a novel genus and species of the family Pseudoalteromonadaceae, for which the name Salsuginimonas clara gen. nov., sp. nov. is proposed. The type strain is LSN-49T (=BCRC 81005T=LMG 29726T=KCTC 52439T).
Keywords: Alteromonadales; New taxa; Proteobacteria; Pseudoalteromonadaceae; Salsuginimonas clara; brackish river.