Streptomyces akebiae sp. nov., a novel actinomycete isolated from rhizosphere soil of Akebia trifoliate

A novel actinomycete strain, designated as MG28(T), was isolated from rhizosphere soil of Akebia trifoliate. The taxonomic position of the strain was investigated by using a polyphasic approach. BLAST search of the full-length 16S rRNA gene sequence of strain MG28(T) indicated it represented a member of the genus Streptomyces, and displayed 99.03%, 98.90%, 98.90%, 98.89%, 98.83% and less than 98.70% sequence similarities with S. phaeolivaceus GY16(T), S. deccanensis KCTC 19241(T), S. europaeiscabiei KACC 20186(T), S. fructofermentans CGMCC 4.1593(T), S. scabiei NRRL B-16523(T) and other species of the genus Streptomyces with validly published names, respectively. Phylogenomic analysis indicated that strain MG28(T) was closely related to Streptomyces deccanensis KCTC 19241(T). However, the average nucleotide identity values and the digital DNA-DNA hybridization values between them indicated that strain MG28(T) represented a distinct species. Furthermore, strain MG28(T) was also distinctly differentiated from strain KCTC 19241(T) by morphological, physiological and biochemical characteristics. Therefore, strain MG28(T) (= MCCC 1K06895(T) = JCM 34922(T)) represents a novel species of the genus Streptomyces, for which the name Streptomyces akebiae sp. nov. is proposed.

Automated summary

A novel actinomycete strain, Streptomyces akebiae sp. nov. (MG28(T)), was isolated from rhizosphere soil of Akebia trifoliate. It showed distinct genetic and phenotypic differences compared to other known species of the genus Streptomyces.