Abstract:The effects of low-pressure（LP，0.05 MPa）storage on cell membrane permeability（CMP）and anti-oxidation of'Anhaibian'bayberry fruit were studied，and atmospheric pressure storage was used as the control check（CK）during 2°C-4°C.The changes of physiological and biochemical indexes related to membrane permeability and anti-oxidation mechanisms were monitored during storage.The results showed that LP storage induced bayberry fruit to initiate the antioxidant protection mechanism，noticeably delayed the occurrence of the endogenous antioxidant ascorbic acid （AsA）peak，caused its content to decline，and delayed the sharp rise in proline（Pro）content. The activity of superoxide dismutase（SOD）and catalase（CAT）increased gradually in the middle period of storage，and retained high activity in the later period，which noticeably inhibited the activity of peroxidase（POD）and polyphenol oxidase（PPO）in bayberry fruit under low temperature stress，the malondialdehyde（MDA）accumulation and membrane lipid peroxidation decreased，CMP rise was delayed，causing CMP to remain below 10%on the 16th day of LP storage，and the physiological senescence of bayberry fruit was delayed. Further analysis showed that LP storage induced the decrease of MDA accumulation and delayed the increase of CMP in bayberry fruit，mainly due to the dominant role of Pro and POD，PPO，SOD，etc.，but the correlation with ASA and CAT was not obvious.