Effects of Different Storage Methods on the Fruit Quality and Physiological Changes in Yihong Honey Peach

不同贮藏方式对颐红水蜜桃果实品质及生理变化的影响

Taking Yihong,the main cultivar of mid-ripening honey peaches(Prunus persica)in Hunan,as material,this study explored the effects of different storage methods on the fruit quality and physiological changes in Yihong honey peach by the combination of polyethylene film packaging with low-temperature storage.The results showed that the weight loss rate of packaged storage at normal temperature(T1)was significantly lower than that of unpackaged storage at normal temperature(CK),but there was no significant difference in other indicators.In the middle of storage,the respiration rate and ethylene release of packaged storage at 0℃(T3)were extremely significantly lower or significantly lower than those of unpackaged storage at 0℃(T2),packaged storage at 0℃after cold adapting at 8℃for 5 d(T4),and packaged storage in a fluctuating temperature range of 0~3.5℃(T5).After storage,the structure of the middle lamella in the cell wall of T3 was compact and uniform,and the mitochondrial structure was complete,while the cell walls and mitochondria of T4 and T5 were severely deformed and disintegrated.The activities of antioxidant enzymes peroxidase(POD)and superoxide dismutase(SOD)of T3 was significantly higher than those of T4 and T5,and the content of malondialdehyde(MDA)and polyphenol oxidase(PPO)of T3 was also the lowest.Therefore,0°C packaged storage can effectively delay the senescence of Yihong honey peach and prolong its freshness period.

以湖南地区中熟水蜜桃主栽品种颐红为材料,采用聚乙烯薄膜包装和低温冷藏的方式,探讨了不同贮藏方式对颐红水蜜桃果实品质及生理变化的影响。结果表明:常温包装贮藏(T1)的失重率显著低于不包装贮藏(CK),而其他指标无显著差异;0℃包装贮藏(T3)的呼吸速率和乙烯释放量在贮藏中期极显著或显著低于0℃不包装贮藏(T2)、包装后先8℃冷锻炼5 d再转入0℃贮藏(T4)和包装后在0~3.5℃波动温度下贮藏(T5);贮藏结束后0℃包装贮藏(T3)果实的细胞壁中胶层结构紧致均匀,线粒体结构完整,而T4和T5果实的细胞壁和线粒体均发生严重变形和解体,T3处理抗氧化酶POD和SOD酶活性显著高于T4和T5,其丙二醛(MDA)和多酚氧化酶(PPO)含量也最低。因此,0℃包装贮藏能有效延缓颐红水蜜桃的果实衰老,延长其保鲜期。