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Evaluation of Streptomyces padanus IA70-5 Strain to Control Hot Pepper Anthracnose (Colletotrichum acutatum)  

Chi, Tran Thi Phuong (Dept. of Applied Biology, Gyeongsang National Univ.)
Choi, Okhee (Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Kwak, Youn-Sig (Dept. of Applied Biology, Gyeongsang National Univ., Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Son, Daeyoung (Dept. of Applied Biology, Gyeongsang National Univ., Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Lee, Jeung Joo (Dept. of Applied Biology, Gyeongsang National Univ., Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Kim, Jinwoo (Dept. of Applied Biology, Gyeongsang National Univ., Insti. of Agric. & Life Sci., Gyeongsang National Univ.)
Publication Information
Journal of agriculture & life science / v.46, no.3, 2012 , pp. 37-45 More about this Journal
Abstract
To select bacterial strains with antifungal activity against an anthracnose fungal disease causing damage severely on hot pepper, previous isolates obtained from plant root samples were screened. Among 457 isolates, IA70-5 isolate was finally selected and identified as Streptomyces padanus based on 16S rDNA sequence analysis. Strain IA70-5 is non-pigmenteous, non-mobile, and filamentous. S. padanus IA70-5 inhibited effectively the mycelium growth, spore germination, and appressorium formation of Colletotrichum acutatum in vitro. The results of this study demonstrated that IA70-5 strain, especially applied on fruit of hot pepper, decreased disease incidence 90% for pre-inoculation before pathogen treatment. Taken together, S. padanus IA70-5 strain is a promising biological control agent to control of a major fungal pepper disease, anthracnose.
Keywords
Biological control; Streptomyces padanus; Anthracnose; Colletotrichum acutatum;
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