Role of Antioxidative Defense in Yellow Mosaic Disease Resistance in Black Gram [Vigna mungo (L.) Hepper]

Yellow mosaic virus (YMV) transmitted by whitefly (Bemisia tabaci) causes yellow disease (YMD) in blackgram cultivars only during kharif season but was not observed the same sown spring season. The main objective of present investigation to study cooperative role various antioxidative enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol (GPOX), glutathione reductase (GR), monodehydro (MDHAR), dehydroascorbate (DHAR) along with non- enzymic antioxidants and free radical scavenging activities under natural epiphytotic conditions black gram Three cultivars-KUG253 (highly susceptible YMD), MASH114 (resistant) Cross (KUG253 × MASH114) at F5 generation were both seasons. During season, YMV caused severe chlorosis KUG253 cultivar 40 days after sowing (DAS) which affected its quantum efficiency 58% compared Higher specific MDHAR, DHAR, GR 20DAS might have helped these fight off right from beginning infection. showed highest anion activity (SASA), ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picryl hydrazyl (DPPH) total (TRP). On other hand, struggled maintain CAT, GR, DHAR progressed further. GPOX APX tried compensate for loss CAT enzyme high NADPH Oxidase promoted production harmful ROS ultimately lead higher oxidative damage cultivar.