CHARACTERIZATION OF SELECTED ISOLATES OF INDIGENOUS STREPTOMYCES SPECIES AND EVALUATION OF THEIR ANTIFUNGAL ACTIVITY AGAINST SELECTED PLANT PATHOGENIC FUNGI
Keywords:
marine-derived actinomycetes, stereptomycetes, Streptomyces violaceusniger, antagonistic actinomycetes, biological controlAbstract
Twenty-five representative isolates from a collection of 54 indigenous actinomycetes isolated from coastal resources, were evaluated for inhibition against plant pathogenic fungi in vitro. Fusarium oxysporum f.sp. cubense (Foc) race 4 and Rhizoctonia solani exhibited higher resistance to the antifungal effects of the isolates when compared to the other test fungi. Seven isolates with potential pathogen-inhibitory capabilities belonged to the gray colour class of Streptomyces. Isolate g10 with a wide and strong antifungal spectrum against a variety of pathogenic fungi belonged to the Streptomyces violaceusniger cluster. This isolate could be a potential biological control agent.
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