Streptomyces jietaisiensis sp. nov., isolated from soil in northern China.

An actinomycete, strain FXJ46(T), was isolated from cypress forest soil in northern China and shown to have chemotaxonomic and morphological properties consistent with streptomycetes. It developed greyish aerial mycelium and pinkish-brown substrate mycelium on oatmeal agar. Phylogenetic analyses based on an almost complete 16S rRNA gene sequence of the strain and on the 120 nucleotide variable gamma-region of this molecule showed that it formed a distinct (but closely associated) line with Streptomyces griseoaurantiacus DSM 40430(T) in Streptomyces trees. However, the DNA-DNA relatedness between the two strains was only 48.8%. A number of phenotypic properties also readily distinguished the isolate from S. griseoaurantiacus and related Streptomyces species with validly published names. It is proposed, therefore, that this organism be classified as a novel species of the genus Streptomyces, for which the name Streptomyces jietaisiensis sp. nov. is proposed. The type strain is FXJ46(T) (=AS 4.1859(T)=JCM 12279(T)).