Induction of nocardioform growth in actinomycetes on media with D-fructose

✍ Scribed by E. T. Nikitina; Dr. L. V. Kalakoutskii

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 415 KB
• Volume: 11
• Category: Article
• ISSN: 0233-111X
• DOI: 10.1002/jobm.19710110705

✦ Synopsis

189 strains of Acti?iomyces (Streptomyces) spp. were screened for their ability to give secondary nocardioform colonies when plated on synthetic mineral medium with either Dfructose, D-glUCOSe or D-galactose as a sole carbon and energy source. All cultures examined were able to utilize each of the sugars as a sole carbon and energy source. Over 6% of cultures tested yielded nocardioform variants when grown on medium with o-fructose but not on D-gluCOSe or o-galactose. The ability to respond in a particular manner to cultivation on a medium with D-fructose was strain-specific. No correlation was found between this ability and the systematic relationships or the antibiotic activity of the actinomycetes tested. Secondary nocardioform colonies usually emerged after a definite lag (5-12 days a t 28 "C) within primary (or "normal") colonies of actinomycetes. The size and number of secondary nocardioform colonies depended on the D-fructose concentration in the medium. Certain implications of the reported findings are discussed.