中文摘要：

为了研究不同支链长度的3种环丙烯类乙烯抑制剂处理对寒富苹果常温贮藏效果的影响，分别采用0．75μL／L1-MCP（1-甲基环丙烯），2μL／L1-PentCP（1-pentylcclopropene，1-戊基环丙烯）和0．5μL／L1-OCP（1-octylcyclopropene；1-辛基环丙烯）在常温条件下，熏蒸处理寒富苹果20h，以不处理为对照，处理后装入厚度0．02mm保鲜袋于常温下贮藏（20℃）。结果表明：1-MCP和1-PentCP处理能较好地抑制寒富苹果贮藏过程中的呼吸强度和乙烯释放量，各处理呼吸高峰时间较对照晚出现了4d，各处理对乙烯释放高峰出现的时间延迟了8d，较好地保持了果实贮藏期间的硬度，延缓了果实固形物含量和丙二醛含量的上升速度。这2个处理还在一定程度上延缓了细胞膜保护酶过氧化物酶、超氧化物歧化酶和过氧化氢酶的活性变化。而1-OCP处理却促进了寒富苹果果实贮藏期间的丙二醛含量的上升，进而导致在贮藏后期出现了一定的伤害作用。研究结果表明，1-MCP和1-PentCP处理可以抑制寒富苹果的生理代谢，保持果实品质和降低膜脂伤害程度，从而延缓寒富苹果采后的成熟衰老进程。

英文摘要：

Effects of three 1-substituted cyclopropenes with different branch chain lengths on postharvest physiology of ＇Hanfu＇ apple were investigated. The apple were packed with plastic bags （0.02 mm） after being fumigated for 20 h with 0.75 μL/L 1-MCP （1-Methylcyclopropene）, 2μL/L 1-PentCP （1-pentylcyclopropene） and 0.5 μL/L 1-OCP （1-octylcyclopropene） respectively and then stored at ambient temperature （20℃）. The results showed that 1-MCP and 1-PentCP treatments reduced ethylene production and respiration rate with respiration peak delayed by 4 days and ethylene peak by 8 days compared with those of control. Both treatments also delayed firmness loss and retarded the increase in soluble solids and malondialdehyde content, meanwhile, they retarded the changes of the activity of peroxidase, superoxide dismutase and catalase. However, malondialdehyde content increased with 1-OCP treated fruits that resulted in some detrimental effect during the late period of storage. It is suggested that both 1-MCP and 1-PentCP can be applied to inhibit physiological metabolism, maintain fruit quality, decrease membrane injury; and delay senescence of＇Hanfu＇ apple fruits.