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Isolation, Identification and Biological Control Activity of SKU-78 Strain against Ralstonia solanacearum  

Sung, Pil-Je (Department of Biological Engineering, Seokyeong University)
Shin, Jeong-Kun (Korea Biochemical Co.)
Cho, Hong-Bum (Department of Biological Engineering, Seokyeong University)
Kim, Shin-Duk (Department of Biological Engineering, Seokyeong University)
Publication Information
Applied Biological Chemistry / v.48, no.1, 2005 , pp. 48-52 More about this Journal
Abstract
Six stains of plant growth promoting rhizobacteria were selected through germinating seed assay and root colonization assay. Among them, SKU-78 strain induced significant suppression of bacterial wilt disease in tomato and pepper plants. Seed treatment followed by soil drench application with this strain resulted in over 60% reduction of bacterial wilt disease compared with the control. It was suggested that SKU-78 strain activated the host defense systems in plants, based on lack of direct antibiosis against pathogen. According to Bergey's Manual of Systemic Bacteriology and 16S rDNA sequence data, SKU-78 stain was identified as Bacillus sp. SKU-78.
Keywords
Ralstonia solanacearum; bacterial wilt disease; PGPR; ISR; biocontrol agent;
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