Salegentibacter catena sp nov., isolated from sediment of the South China Sea, and emended description of the genus Salegentibacter

A novel marine bacterial strain, HY1(T) was isolated from sediment of the South China Sea. The strain was aerobic and heterotrophic and formed saffron yellow-pigmented colonies on marine agar 2216. Cells were non-motile, Gram-negative rods, frequently occurring in chains. BLASTN searches revealed that the 16S rRNA gene sequence of strain HY1T showed high similarity with those of members of the genera Gillisia (91.7-93.8 %) and Salegentibacter (92.6-93.5 %). Phylogenetic analysis based on 16S rRNA gene sequences showed that the strain clustered with members of both Salegentibacter and Gillisia and phylogenetic trees constructed using three different methods (neighbour-joining, maximum-parsimony and minimum-evolution) indicated that strain HY1T clustered more frequently with members of the genus Salegentibacter. The DNA G +C content of strain HY1T was 44.4 mol% and its major cellular fatty acids (>= 5 % of the total fatty acids) were iso-15:1 (5.0 %), iso-15:0 (6.8 %), anteiso-15:0 (6.4 %), 15:0 (110.4 %), iso-16:0 (13.5 %), summed feature 3 (comprising iso-15: 0 2-OH and/or 16: 1 omega 7c; 6.3 %), iso-17:0 3-OH (5.2 %) and 17: 0 2-OH (5.0 %). Cells contained menaquinone 6. Based on the phylogenetic and phenotypic analyses, strain HY1T should be classified as representing a novel species within the genus Salegentibacter, for which the name Salegentibacter catena sp. nov. is proposed. The type strain is HY1(T) (= CGMCC 1.6101(T)=JCM 14015(T)). Based on this study and on previously described Salegentibacter species, an emended description of the genus Salegentibacter is given.