After Phytophthora Melonis Toxin induced calli of Melon.

two Enzymes of relevant to resistance and osmotic potentiality of membrane had been studied.After treated by toxin

the activities of ppo and PAL increased and this characterization still existed after callus were subcultured four times.The osmotic potentiality of membrane of callus reduced at first

but with the generations increasing

the changing tended to be stable.