[Objective]To explore the activity changes of related enzymes in flue-cured tobacco leaves during storage. [Method]We studied the activity change trends of polyphenol oxidase( PPO),peroxidase( POD),lipoxygenase( LOX) and phenylalanine lyase( PAL) in tobacco leases with the extension of storage time based on NC89 flue-cured tobacco as experimental material in south Anhui. [Result]As the storage time increased,the activity of four enzymes showed a tendency of increasing first and then decreasing. The maximum ...