Abstract
Trejo, W. H. (Squibb Institute for Medical Research, New Brunswick, N.J.) and R. E. Bennett. Streptomyces species comprising the blue-spore series. J. Bacteriol. 85:676–690. 1963.—The objective of this study was to define and delimit the streptomycetes of the blue-spored (Viridochromogenes) series. The series, as defined in this study, includes 11 blue and blue-green species. The green-spored species were excluded on the basis of morphology as well as color. It was proposed that NRRL B-1511 be designated as the neotype strain of Streptomyces viridochromogenes (Krainsky) Waksman and Henrici, and that IMRU 3761 be designated as the neotype for Streptomyces cyaneus (Krassilnikov) Waksman. Evidence was presented to show that physiological criteria cannot be used to differentiate these organisms below the series level. The major characteristics of the Viridochromogenes series are blue to blue-green spores borne in spirals, and chromogenicity (melanin-positive). Reverse color and spore morphology provide a basis for separation below the series level.
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