[Developmental cycle and the cytomorphological characteristics of the oleandomycin producer Streptomyces antibioticus].
The developmental cycle and cytomorphological features of the industrial strain OL-1 and its variant 0968 of the oleandomycin-producing organism were studied. Variant 0968 was obtained as a result of exposure of the spores of strain OL-1 to UV light. When grown under submerged conditions in flasks with the rich medium, the strains were characterized by a complete developmental cycle consisting of three generations of the hyphae. Every generation had a tendency for formation of submerged spores. The UV-induced variant differed from the industrial strain by higher levels of the antibiotic accumulation which correlated with higher rates of the spore germination. The strains were characterized by polymorphism of the mycelium and formation of submerged spores during their cultivation which is likely to prolong the antibiotic synthesis from 120 to 216 hours from the inoculation moment. The long-term selection of the oleandomycin-producing organism on the rich medium markedly changed the culture genotype and resulted in significant changes in the developmental cycle under submerged cultivation conditions. The data may be used for the microscopic control of the process of oleandomycin production.
D003470:Culture Media / Q000378:metabolism; D009827:Oleandomycin / Q000096:biosynthesis*; D012641:Selection, Genetic; D013302:Streptomyces / Q000254:growth & development*; D013303:Streptomyces antibioticus / Q000166:cytology / Q000254:growth & development*; D013997:Time Factors
D003470:Culture Media; D009827:Oleandomycin
Tsikl razvitiia i tsitomorfologicheskie osobennosti produtsenta oleandomitsina Streptomyces antibioticus.