PRODUCTION of ANTIFUNGAL COMPOUNDS by ACTINOMYCETES ISOLATED from ANDEAN and ANTARCTIC SOILS

Abstract:

A preliminary screening to determine the production of bioactive compounds to control plant pathogenic fungi that belong to the genera Alternaria, Botrytis, Fusarium and Phoma was examined for eight actinomycete strains isolated from Andean and Antarctic soils. Phylogenetic analyses of partial sequences of the 16S rDNA gene showed that five strains were closely related to Streptomyces fildesensis GW25-5T, two to Streptomyces griseus ISP 5236T and one to Streptomyces olivochromogenes DSM 40451T. Only one actinomycete strain could inhibit the growth of all four pathogens while the rest had different degrees of control. The best results were obtained for the plant pathogens Alternaria and Phoma since all the actinomycetes could stop their growth. For Fusarium, only the S. griseus strains were able to show efficiency in controlling it. This study shows that actinomycetes are a prolific source of bioactive compounds.

Año de publicación:

2018

Keywords:

• Fungal plant pathogens
• Streptomyces
• 16s rDNA gene
• Antifungal compounds

Fuente:

scopus