1-MCP负压渗透处理对鲜枣贮藏期间生理及抗氧化能力的影响

EFFECT OF 1-MCP NEGATIVE PRESSURE OSMOSIS TREATMENT ON ANTIOXIDANT CAPABILITY IN JUJUBE FRUITS DURING STORAGE

以山东大瓜枣为试材,研究1-甲基环丙烯(1-MCP)负压渗透处理对鲜枣贮藏期间生理指标及抗氧化能力的影响。结果表明:1-MCP处理可以维持鲜枣果实体内较低的活性氧水平(H2O2),提高果实自身抗氧化能力(T-AOC、OH.、O2.-、DPPH),维持果实自身的抗氧化物质抗坏血酸(AsA)及总酚含量;1-MCP处理对果实过氧化氢酶(CAT)呈现抑制表达作用,而对于抗坏血酸过氧化物酶(APX)、超氧化物歧化酶(SOD)、多酚氧化酶(PPO)和过氧化物酶(POD)则有一定的激活作用。

The changes of antioxidant activities in Shandong Dagua Jujube（Ziziphus jujube Mill cv.Dagua） fruits treated with 1-MCP negative pressure osmosis were studied.The contents of H2O2,total phenols and ascorbic acid,activities of OH.,O2.-and DPPH.scavenging rates,catalase（CAT）,peroxidase（POD）,polyphenoloxidase（PPO） activities were investigated.The results showed that 1-MCP treatment decreased the level of active oxygen（H2O2） and increased the antioxidation activities of the fresh fruits（T1-MAOC,OH.,O2.-,DPPH.）.During the storage,the contents of total phenols and ascorbic acid in 1-MCP treated fruits were higher than untreated control.Meanwhile,the activity of CAT was restrained in 1-MCP treatment group and the activities of other enzymes（APX,SOD,PPO,and POD） were activated by 1-MCP at a certain degree.