Induction of systemic resistance in adzuki bean through seed bacterisation
Efficacy of seed bacterisation with six rhizobacterial isolates was assessed in laboratory conditions to evaluate their resistance-inducing ability in adzuki bean. The selected indigenous isolates were characterised as Pseudomonas fluorescens and Bacillus species. Among these isolates, P. fluorescens isolate B5 showed the maximum inhibition of mycelial growth of Phoma species and increased plant growth promotion. P. fluorescens isolates B5, B6, B8, B9 and B17 and Bacillus sp. isolate B18 were effective in reducing the percentage of diseased seedlings. Increased levels of peroxidase, phenylalanine ammonia lyase and polyphenol oxidase were observed in seedlings indicating higher levels of induced systemic resistance. Maximum induction of defence enzymes was observed with isolate B5, followed by B6 and B18. The utilisation of indigenous plant growth promoting rhizobacteria strains as inducers of plant defence response may offer a practical method for eco-friendly plant disease management.
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Document Type: Research Article
Publication date: December 1, 2014
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