Physiological responses of pear leaves infected by Physalospora piricola Nose

Decrease in PPO, CAT, POD and SOD activity, reduction in GSH and ASA levels and increase in MDA content and O_(2)~(-) generation rate in pear leaves were observed, when infected with Physalospora piricola Nose. The results indicated that infection of the pear leaves with P. piricola could cause damages to the system of active oxygen elimination, hence the membrane lipid peroxidation and the injury to pear leaves.