1-MCP对冬枣冷藏期间乙烯代谢及细胞膜脂过氧化作用的影响

1-MCP对冬枣冷藏期间乙烯代谢及细胞膜脂过氧化作用的

影响

张玮;陈延;饶景萍

【期刊名称】《安徽农业科学》 【年(卷),期】2012(000)027

【摘要】[目的]探讨1-MCP对果实成熟衰老的调控机制,为控制果实成熟衰老进程提供理论依据.[方法]以冬枣为试材,以未经处理的冬枣为对照,测定在冷藏条件下不同浓度1 -MCP处理后冬枣的呼吸强度、乙烯释放速率、MDA含量及ACS、ACO、SOD、CAT、POD等酶活性的变化.[结果]经测定,1-MCP在贮藏前期有效抑制了冬枣ACS活性,在贮藏后期有效抑制了冬枣ACO活性,处理果的呼吸强度和乙烯释放速率均低于对照,差异达到显著水平.同时,1-MCP处理有效地减少了MDA的积累,与对照比较,虽然1-MCP处理未改变SOD、CAT和POD的变化趋势,但却显著提高了它们的活性.[结论]1-MCP能有效降低非跃变型果实冬枣的膜脂过氧化水平、呼吸强度和乙烯释放速率,延缓果实衰老进程,并对乙烯的生物合成过程产生抑制.%[ Objective] To study the effects of 1-MCP on the fruit ripening and senescence process of winter jujube, so as to provide reference for controlling its fruit ripening and senescence process. [ Method] With the untreated winter jujube as the control f the effects of different concentrations of 1-MCP treatments on the respiration rate, ethylene production rate, content of MDA, and ACS, ACO, SOD, CAT, POD enzyme activity in winter jujube were determined. [ Result] The result showed 1-MCP can effectively inhibit the activity of