Abstract:The effects of low-voltage electrostatic field treatment on the healing effect of post-harvest potato tubers were investigated in'Jizhangshu No.12'potato tubers，which served as the test material.After artificial mechanical damage，the calluses were placed under normal temperature（20±2）℃ and relative humidity（85%-90%）conditions in the dark and subjected to a low-voltage electrostatic field.Changes in weight-loss rate，hardness of injury wounds，browning degree，activity of key enzymes associated with phenylpropane metabolism，and contents of metabolites were measured.The effects of the low-voltage electrostatic field on peroxidase，polyphenol oxidase activity，and hydrogen peroxide （H2O2）contents were analyzed to evaluate the effects of the electrostatic field on the calluses.During the callus period，the low-voltage electrostatic field treatment effectively reduced the weight loss of damaged tubers and significantly promoted increase of the browning degree and hardness of the damaged parts.After the low-voltage electrostatic field treatment，the activity of phenylalanine ammonia lyase in the tuber wounds increased significantly and the contents of total phenols，flavonoids，and lignin also increased.In addition，the low-voltage electrostatic field treatment also increased the activities of polyphenol oxidase and peroxidase and H2O2contents in the tuber wounds.These results showed that low-voltage electrostatic field treatment can promote callus formation in postharvest potato tubers.