【摘要】 在温度为0℃±0.5℃、相对湿度为90%~95%的贮藏条件下,用3种不同厚度(0.012 mm,0.018 mm,0.024mm)的聚乙烯袋对"富有"柿子进行自发气调(MA)贮藏,定期对各处理组袋内气体浓度变化,柿果的可溶性固形物(TSS)、膜透性、VC含量、多酚氧化酶(PPO)、过氧化物酶(POD)活性以及柿果硬度和黏附力进行测定。通过分析各指标在贮藏期间的变化,比较了3种不同厚度MA包装的贮藏效果。结果表明:0.024 mm厚的MA包装能使袋内保持较低的O2和较高的CO2气体组成,气调效果较好;贮藏60 d时,该包装组能够较好地保持柿果的可溶性固形物和VC的含量,有效地抑制了柿果膜透性和PPO和POD活性的增大,延缓了果实的组织褐变及衰老,使柿果保持了较好的质构特性,延长了柿果的贮藏期。更多还原

【Abstract】 Persimmon fruit were stored with three different thicknesses(0.012 mm, 0.018 mm, 0.024 mm) polyethylene bags by modified atmosphere packaging(MAP) at 0 ℃±0.5 ℃ and 90%~95% relative humidity. Change of gas concentration in bags, Physiological parameters such as total soluble solids(TSS), membrane permeability, VC content, polyphenol oxidase(PPO) activity, peroxidase(POD) activity, fruit hardness and adhesive force were monitored periodically during storage to compare the effectiveness of the three kinds of different treatments. The results showed that: the MAP-3 of 0.024 mm kept lower O2 and CO2 composition. After 60 days of storage, MAP-3 maintained the content of TSS and VC content primely, inhibited the increase of membrane permeability and PPO activity, delayed the browning of fruit tissue, maintained higher POD activity to eliminate the metabolism-related free radicals, delayed the senescence of persimmon fruit, made the persimmon fruit maintain higher texture properties and extend the storage period of persimmon fruit.更多还原