Potency of plant products in control of virus diseases of plants.

Abstract The exploitation of the inherent resistance phenomenon and manipulation of inducible defence in plants is currently receiving much attention by researchers to control virus infection. Recent advances in the molecular biology of resistance to virus infection have presented new approaches for making susceptible crops resistant against virus infection. These approaches include pathogen-derived resistance to viruses (coatprotein-mediated resistance, movement-protein-mediated resistance, replicase- and protease-mediated resistance) and virus resistance through transgenic expression of antiviral proteins of non-viral origin. Endogenously occurring substances in a few higher plants have also been reported to induce systemic resistance in susceptible hosts against virus infections. Ribosome-inactivating proteins (RIPs) may also play an important role in the prevention of virus infection.