Abstract:

There are two reasons causing the occurrence of rough bark disease on apple stem. Experiments were conducted under potted grown conditions, the activity of protection enzymes of the leaf were studied in the conditions of the over concentration of Mn and the inoculate by Botryosphaeria berengeriana f. sp. piricola. Results showed that the activities of superoxide dismutase (SOD), peroxidase (POD) and the malonaldehyde (MDA) contents all were strong at first and then declined. The maximum value of PAL by inoculate the Botryosphaeria berengeriana f. sp. piricola was earlier and higher than those of the over concentration of Mn. The over concentration of Mn had no effect on the PPO activities.