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S. RAJASEKHAR, Y. AMARAVATHI, R.P. VASANTHI AND N.P. ESWARA REDDY
Department of Plant Molecular Biology and Biotechnology, S.V. Agricultural College, ANGRAU,Tirupati-517502, Andhra Pradesh.
One groundnut stem rot tolerant and susceptible genotypes were evaluated for their biochemical constituents after inoculation with Scelortium rolfsii at 24 hrs interval up to 4 days. The total phenols content increased significantly in both the genotypes at all stages; however, higher accumulation of phenols was noticed at 96 hrs after inoculation. Total phenol content in tolerant genotype ICGV 86590 was increased by 1.2 folds at 72 hrs after inoculation and further increased by 1.7 folds at 96 hrs after inoculation in comparison with the susceptible genotype, Narayani. The higher accumulation of phenols at 96 hrs after inoculation might be due to the higher disease intensity which was corresponding to the most vulnerable stage of infection. PPO activity in ICGV 86590 gradually increased up to 72 hrs and slightly reduced at 96 hrs after S. rolfsii inoculation.
Sclerotium rolfsii, groundnut, total phenols and Poly phenol Oxidase (PPO).