beta-1,3-Glucanase, Polyphenol oxidase and Peroxidase activities in relation to tolerance of Black Pepper to Phytophthora capsici

摘要

The biochemical changes in black pepper due to root infection caused by Phytophthora capsici, were studied in the root and leaf tissues of susceptible (KS 27) and disease tolerant (P 24) selections on different days after infection (DAI). The activityof the enzymes - beta-1,3-glucanase, polyphenol oxidase (PPO) and peroxidase (PRX) - increased on infection in both selections, the increase being earlier and greater in P 24 than in KS 27. Significant qualitative differences were also found in the PPOand PRX isozyme profiles of both selections. Results indicate a definite role for these enzymes in the tolerance or susceptibility of black pepper to P. capsici.