Changes in Phyto-Chemical Status upon Viral Infections in Plant:A Critical Review

Most damaging plant diseases have been caused by viruses in the entire world. In tropical and subtropical areas, damage virus leads to great economic agricultural losses. Single stranded DNA (geminiviruses) are most perilous pathogens which responsible for major agronomic horticultural crops. Significantly begomoviruses mastreviruses biggest genus of infecting viruses, transmitted though Bemisia tabaci members Cicadellidae respectively. Plants possesses some naturally existing chemicals term as phyto-chemicals perform important functions plant. Some antioxidant enzymes used plants self-defense upon foreign invasion infection. This review explains present perceptive influence viral infections on phyto-chemicals, oxidative biochemical changes occurring Viral infection mediated phyto-chemical mainly includes: up down regulation photosynthetic pigment, increase concentration phenolic compounds, elevation starch content leaf & anti-oxidative including (GPX) guaiacol peroxidase, (PPO) polyphenol oxidase, (APX) ascorbate (SOD) superoxide dismutase (CTA) catalase. These lead initiation hypersensitive response, thicken lamina, lignification under surface, blocking stomatal openings, systematic cell death, generation reactive species (ROS), activation pathogen resistance pathways i.e., production salicylic acid jasmonic acid. Collectively all physiological due supports defense mechanism combat against limiting specific area, followed with barriers pathogen, accumulation excess (ROS). strategies prevent spread whole minimize risk severe yield loss.