After UV-B irradiated enhanced, the activity of peroxidase (POD), polyphenoloxidase (PPO) and phenylalanine ammonia-lyase (PAL) were in-creased 1.76 and 1.5 and 1.74 times respectively in 7 days.

• POD活性在处理后第7天时达最大值，为处理前的1.；76倍，PPO活性在处理后第6天增加到对照的1