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KMID : 1160220140420020158
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Mycobiology
2014 Volume.42 No. 2 p.158 ~ p.166
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Biocontrol of Fusarium Crown and Root Rot and Promotion of Growth of Tomato by Paenibacillus Strains Isolated from Soil
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Xu Sheng Jun
Kim Byung-Sup
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Abstract
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In this study, bacterial strains were isolated from soils from 30 locations of Samcheok, Gangwon province. Of theisolated strains, seven showed potential plant growth promoting and antagonistic activities. Based on cultural and morphologicalcharacterization, and 16S rRNA gene sequencing, these strains were identified as Paenibacillus species. All seven strains producedammonia, cellulase, hydrocyanic acid, indole-3-acetic acid, protease, phosphatase, and siderophores. They also inhibited themycelial growth of Fusarium oxysporum f. sp. radicis-lycopersici in vitro. The seven Paenibacillus strains enhanced a range ofgrowth parameters in tomato plants under greenhouse conditions, in comparison with non-inoculated control plants. Notably,treatment of tomato plants with one identified strain, P. polymyxa SC09-21, resulted in 80.0% suppression of fusarium crown androot rot under greenhouse conditions. The plant growth promoting and antifungal activity of P. polymyxa SC09-21 identified inthis study highlight its potential suitability as a bioinoculant.
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KEYWORD
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Antagonistic activity, Fusarium oxysporum f. sp. radicis-lycopersici, Paenibacillus spp., Plant growth promoting rhizobacteria
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