Abstract:To study the effect of packaging on storage quality and physiological changes of mushroom after postharvest.In this study，the quality and physiological changes of Pleurotus ostreatus with low temperature（4℃）were measured by nitrogen-filled（99.99%）packaging.The results showed that nitrogen-filled packaging effectively maintained the sensory quality，weight loss and color of Pleurotus ostreatus during the storage.The accumulation of malondialdehyde（MDA）content was inhibited that maintained cell membrane integrity.The content of total pehnolic was retained and the activity of polyphenol oxidase（PPO）was suppressed，which effectively slowed down the enzymatic browning reaction.Meanwhile，the activity of catalase（CAT）was enhanced and the damage of excessive hydrogen peroxide was reduced in the aging process.Thus，nitrogen-filled packaging effectively decreased the physiological metabolism and maintained the quality of Pleurotus ostreatus during the storage.