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In order to study the mechanism of micro-vacuum storage delaying Pleurotus ostreatus senescence, the modified atmosphere package storage was used as a control group to explore the delaying senescence mechanism of Pleurotus ostreatus under micro-vacuum storage. The activity of endogenesis antioxidative enzymes (SOD, CAT, POD), PPO, the regression relationship of superoxide anion (O-2•), H2O2, MDA content and relative leakage rate were studied. The results showed that micro-vacuum storage could significantly improve the activities of SOD, CAT and POD, decrease the accumulation of O-2• and H2O2, delay the increasing of MDA content and relative leakage rate, decline the activities of PPO (p<0.05). It showed that the micro vacuum storage can reduce the accumulation of free radicals, keep cell membrane structure and function, inhibit browning and change of quality through improving the endogenous antioxidant enzymes activity to delay senescence process of Pleurotus ostreatus.

The Mechanism of Micro-vacuum Storage Delaying <em>Pleurotus ostreatus</em> Senescence