丽江雪桃外形美观、果型硕大，口感甜脆，营养丰富。1-MCP是一种新型的乙烯受体抑制剂，在果蔬保鲜中运用较为广泛。本文通过探讨1-甲基环丙烯（简称1-MCP）对丽江雪桃的保鲜效果及机理，寻找一种符合食品安全的丽江雪桃保鲜方法。以丽江市龙县拉市乡的丽江雪桃为试验材料，研究用0.5、1、1.5、2 μL/L的1-MCP分别处理丽江雪桃后，放置在冷藏（3±1） ℃条件下的生理变化情况。结果表明：在冷藏条件下，1-MCP 处理丽江雪桃能够有效的保持丽江雪桃硬度和细胞膜透性，抑制丽江雪桃的呼吸作用，1、1.5、2 μL/L的1-MCP处理丽江雪桃能增加丽江雪桃果肉POD的活性，1 μL/L的1-MCP处理组的丽江雪桃可以抑制总酚含量和PPO活性的下降效，抑制丽江雪桃的果肉褐变，综合分析，1 μL/L的1-MCP处理丽江雪桃的保鲜效果较好。

Lijiang snow peach has large shape, sweet crisp taste and is in rich of nutrition1-MCP is a new type of ethylene receptor inhibitor, widely used in keeping fruit and vegetablefresh. In this work, the fresh-keeping effect of 1-methylcyclopropene (1-MCP) on snow peaches and its mechanism were explored to find out an effective and safe fresh-keeping way for snow peach. The Lijiang snow peaches were picked from Lashi Township Yulong county andLijiang city were treated by 1-MCP with different concentrations(0.5, 1, 1.5 and 2 μL/L). The results showed that, at refrigerated temperature, 1-MCP treatment was very effective in maintaining hardness and membrane permeability of the peach, as well as inhibiting Lijiang snow peach respiration. 1-MCP treatment with the concentration of 1~2 μL/L was more effective in increasing the Lijiang snow peach POD activity than that with lower concentration. 1 μL/L 1-MCP treatment was effective in inhibiting total phenol content, PPO activity decline, and pulp Browning of Lijiang snow peach. Comprehensive analysis showed that the best treatment concentration of 1-MCP was 1 μL/L.

云南省应用基础研究计划项目（2011FZ092）