Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: August 23, 1996
Publication Date: N/A
Technical Abstract: As part of a molecular taxonomic study of red-spored streptomycetes, the DNA relatedness among the type strains of the four species comprising the Streptomyces fulvissimus phenotypic cluster (S. fulvissimus NRRL B- 1453, S. aureoverticillatus NRRL B-3326, S. longispororuber NRRL B-2297, and S. spectabilis NRRL 2792) and the four species comprising the Streptomyces griseoviridis phenotypic cluster (S. griseoviridis NRRL 2427, S. chryseus NRRL B-12347, S. daghestonicus NRRL B-2710, and S. murinus NRRL B-2286) was measured spectrophotometrically from C0t0.5 determinations. All strains were also compared to the type strain of Streptomyces lavendulae NRRL B-1230. The strains segregated into 7 cluster groups at DNA relatedness greater than 70% by unweighted average clustering, including 5 single member clusters. S. griseoviridis and S. daghestonicus from the S. griseoviridis phenotypic cluster were found to be synonymous at 95% DNA relatedness, while S. chryseus was observed to be synonymous with S. longispororuber from the S. fulvissimus phenotypic cluster at 97% DNA relatedness. None of the strains exhibited significant homology to S. lavendulae. All of the single member clusters clearly represent distinct taxa indicating that the clusters formed by numerical taxonomic analysis of physiological and morphological properties are not indicative of species.