Streptomyces oceani sp. nov., a new obligate marine actinomycete isolated from a deep-sea sample of seep authigenic carbonate nodule in south china sea

Abstract

A novel aerobic actinomycete strain, designated as SCSIO 02100 T, was isolated from a deep sea sediment sample collected from Northern South China Sea at a depth of 578 m. This isolate requires sea water or a sodium-supplemented medium for growth. BLAST searches based on the almost full length of the 16S rRNA gene sequence, showed that strain SCSIO 02100 T had the highest similarities with Streptomyces armeniacus (JCM 3070 T) (97.1 %). Phylogenetic trees reconstructed on the basis of 16S rRNA gene sequences revealed that strain SCSIO 02100 T formed a distinct lineage with S. nanshensis SCSIO 01066 T with 96.9 % similarity. Further analysis of the polyphasic taxonomic data, including morphological, phenotypic and chemotaxonomic properties, showed that strain SCSIO 02100 T could be readily distinguished from the most closely related members of the genus Streptomyces. Thus, based on the polyphasic taxonomic data, a novel species, Streptomyces oceani sp. nov., is proposed, with the type strain SCSIO 02100 T (=DSM 42043 T = CGMCC 4.7007 T).