Postharvest 2% citric acid treatment enhanced activities of POD, PAL, CAT and SOD, whereas inhibited activity of polyphenoloxidase (PPO), and reduced contents of superoxide radical (O2-). H2O2 and MDA in pears during storage.

• 采后2%25柠檬酸处理显著提高贮藏过程中鸭梨果实POD、PAL、CAT和SOD活性却抑制了多酚氧化酶(PPO)活性,同时还抑制了超氧阴离子(O_2~-)和H_2O_2含量上升和MDA的积累。