Headspace volatile substances (VS) produced by Streptomyces coelicolor were preminarily identified using GC-MS. The effect of VS of S. coelicolor on the control of mycelial growth and spore germination of Botrytis cinerea and Penicillium chrysogenum was studied. Ten volatile compounds were tentatively identified in 1-week –old diphasic cultures of S. coelicolor. They could be chemically grouped into organic acids, Alcohol , alkanes and aldehyde. The most abundant compound in volatile of S. coelicolor was 2-methyl-1-butanol. Five antifungal compound 2-methyl-1-butanol, 2-pentane 3-methyl, acetaldehyde, n- hexane and palmitic acid were detected in the volatile profile of S. coelicolor. A significant (P< 00.1) suppression of the mycelial growth of B. cinerea and P0.01 of P. chrysogenum by the VS of S. coelicolor were observed. Spore germination of B. cinerea and P. chrysogenum were decreased with comparison by control . The potential of using VS of S. coelicolor as a biofumigant to control plant fungal diseases is discussed.
Volatile substances, Streptomyces coelicolor, Botrytis cinerea, Penicillium chrysogenum, mycelial growth, spore germination