Biochemical variations in resistant and susceptible brinjal varieties infected by root knot nematode, Meloidogyne incognita

Investigation on biochemical changes were made in two brinjnl varieties viz. Pusa purple long (susceptible) and Ghatiia white (resistant) moculated with root-knot nematode, Meloidogyne incognita. Five amino acids like L-cystine, L-serine, L-tryptophan, L-leucine and L-isoleucine were found to be common in both the varieties. Higher concentration of various amino acids and amides were detected in each variety upon nematode inoculation except L-tryptophan. The content of chlorogenic acid, total sugar, peroxidase and catalase activities were higher in moculated samples than their healthy counter parts. However, the catalase activity was reduced in moculated susceptible sample.