Abstract
Two actinomycete strains, MS16-10G and MS16-10W, isolated from soil and producing an antibiotic, were examined and assigned to the genus Streptomyces, because they have a gray aerial mass, spiral spore chains, and a spiny spore surface; form a melanoid pigment on tyrosine agar, on peptone-yeast extract-iron agar, and in tryptone-yeast extract broth; and have cell wall chemotype I. The DNA base compositions and DNA-DNA reassociation of the isolates were compared with those of four strains of authentic species of the genus Streptomyces: two synonymous strains of Streptomyces cyaneus(Streptomyces afghaniensis and Streptomyces echinatus) and one strain each of Streptomyces chromofuscus and Streptomyces antibioticus showing similar morphological characteristics. The results indicated that the two isolates differed from the four authentic species and represent a single new species for which the name Streptomyces bungoensis is proposed. The type strain is MS16-10G, which has been deposited in the collection of the Fermentation Research Institute, Agency of Industrial Sciences and Technology, Tsukuba, Japan, with accession no. FERM 8432T.
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