SOD1 and viral infectious disease: Plant cells are protected against the oxidative damage caused by ROS through a complex antioxidant system, comprising antioxidants like ascorbic acid (Vitamin C, Vc) and antioxidant enzymes like superoxide dismutases (SOD) and catalases (CAT).Very few reports are available for antioxidative enzymes activity in plants subjected to biotic stresses especially, viral infection.