Department of Plant Pathology, University of Agricultural Sciences, Dharwad-580005
Studies on the characterization of AVP from sorghum and coconut leaves indicated it to be a proteinaceous compound and the translocation mechanism might afford protection against virus infection. The effects of coconut and sorghum leaf extracts were studied to know the antiviral properties through ISR. There was less number of lesions production after the spray of leaf extracts 48 hours after inoculation with coconut and sorghum leaf extracts. There was incidence of 80,7 per cent by coconut and 89.7 per cent by sorghum. Spray of leaf extract before inoculation showed less enzymatic activities. Spray of leaf extracts 24 hrs after inoculation followed by reinoculation resulted in less production and activity of PAL, PO, PPO indicating that low Induced. Systemic Resistance (ISR) activity. Spray of leaf extracts after 48 hours of inoculation showed high ISR activities through higher levels of PAL, PO, PPO compared to just inoculated plants. Both the leaf extracts sprayed 48 hours after inoculation showed very high concentration of PAL, peroxidase and polyphenol oxidase. Hence, leaf extract sprayed plants showed more inhibition of lesion production and per cent incidence,
Tospovirus, Bunyaviridae, peroxidase, polyphenol oxidase, phenylalanine ammonia lyase.
