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International Journal of Plant Pathology
Year: 2011  |  Volume: 2  |  Issue: 1  |  Page No.: 35 - 42

Antiviral Activity of Plant Extracts and other Inducers against Tobamoviruses Infection in Bell Pepper and Tomato Plants

K.N. Madhusudhan, G. Vinayarani, S.A. Deepak, S.R. Niranjana, H.S. Prakash, G.P. Singh, A.K. Sinha and B.C. Prasad    

Abstract: The present study was aimed to investigate the effect of inducers viz., plant extracts, plant seed oils and salicylic acid on tobamoviruses in both indicator and host plant. Tobamoviruses are major hurdles in the production of tomato and bell pepper. Currently, different inducers derived from various origins are being used to reduce the virus concentration. Preliminary screening of the inducers against tobamoviruses was conducted by using the local lesion assay (Nicotiana glutinosa). The results showed that all the inducers used for screening were effective in reducing the number of local lesions formed by the challenge inoculation of tobamoviruses. Both spray and seed treatment of inducers against the tobamoviruses reduced the concentration of viruses in the seedlings as evident from the results of Indirect Enzyme linked immunosorbent assay. Among the inducers used for the induction of resistance against tobamoviruses, Bougainvillea spectabilis extract was found to be most effective. The inducer-treated seeds also showed enhancement of seed germination and seedling vigor.

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