Parasedimentitalea nitratireducens sp. nov., a Novel Nitrate-Reducing Bacterium Isolated from the Yellow Sea

A Gram-stain-negative, rod-shaped, aerobic strain CY06T was isolated from surface marine sediment sample of the Yellow Sea, China. The strain was positive for oxidase and catalase and could reduce nitrate to nitrite but not further to gaseous nitrogen products. Phylogenetic analysis based on 16S rRNA gene sequences and the up-to-date bacterial core gene (UBCG) sequences revealed that strain CY06T formed a distinct clade within the genus Parasedimentitalea. Genomic comparisons, including digital DNA-DNA hybridization (dDDH), average nucleotide identity (ANI) and average amino acid identity (AAI), clearly distinguished strain CY06T from other members of the genus. The morphological, physiological, biochemical and chemotaxonomic data further supported its differentiation from closely related species. Based on the polyphasic evidence, a new species, Parasedimentitalea nitratireducens sp. nov., is proposed, with the type strain CY06T (=MCCC 1K08636T = KCTC 72006T).