Actinomycetes, 1991, Vol.2, Part 1. pp. 13-17.
Variability of Streptomyces spectabilis 1000
N. VESSELINOVA and R. GESHEVA
Code Number: AC91004
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Abstract.
From studies carried out on the polymorphism of
Streptomyces spectabilis it has been established that
the strain population is heterogenous and consists of several
morphological variants of essential cultural, physiological
and biochemical differences. Predominant in the population is
the main type, 95.67%, characterized by the specific features
of the parent strain. Following in number is the yellow
sporogenous variant, 4.0%. The remaining variants are rather
rarely observed, 0.1%. Particularly characteristic are the
colonies of the hypercoloured oligosporous variant having the
highest antibiotic activity. It has been found by thin-layer
chromatography that all the variants form antibiotic 1011
identical to streptovaricin except the red oligosporous
variant which biosynthesizes only antibiotic 1012, new for the
species S. spectabilis. Polymorphism established widens
the idea of the species S.spectabilis and enhances the
efficiency of selection methods.
Copyright 1996 C.E.T.A., The International Centre for
Theoretical and Applied Ecology, Gorizia
