Effects of Biotic and Abiotic Agents on Sugarcane mosaic virus Titre, Oxidative Enzymes and Phenolics in Sorghum bicolor

Balamuralikrishnan, M. and Doraisamy, Sabitha and Ganapathy, T. and Viswanathan, R. (2005) Effects of Biotic and Abiotic Agents on Sugarcane mosaic virus Titre, Oxidative Enzymes and Phenolics in Sorghum bicolor. Acta Phytopathologica et Entomologica Hungarica, 40 (1-2). pp. 9-22. ISSN 0238-1249

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Abstract

Treatment of acibenzolar-S-methyl (bionTM), salicylic acid and the saprophytic bacterium Pseudomonas fluorescens exhibited induced systemic resistance in Sorghum bicolor (cv. Rio) to Sugarcane mosaic virus (SCMV) isolates from sugarcane. The treatments significantly slowed down the SCMV titre in plants during the initial growth phase. The enhanced induction of total phenols, phenylalanine ammonia lyase (PAL), peroxidase (PO) and polyphenol oxidase (PPO) might have contributed for the induced systemic resistance triggered by various biotic and abiotic inducers. More induction of PO and PPO isozymes were noticed upon application of these inducers. In the present studies, there was a significant decrease of SCMV titre as evidenced by ELISA in these treatments. Among the treatment methods, foliar application was highly effective in case of the abiotic elicitors bion and salicylic acid whereas with P. fluorescens seed treatment was effective.

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