三种乙烯效应抑制剂对软枣猕猴桃贮藏品质的影响

Effects of Three Ethylene-action Inhibitors on Storage Quality of Actinidia arguta

摘要:

本实验研究了三种环丙烯类乙烯效应抑制剂对青熟期软枣猕猴桃果实采后生理品质的影响。实验以相应浓度的1-MCP（1-methylecyclopropene，1-甲基环丙烯）处理为参照，采用0.4、0.8、1.2 μL/L的1-PentCP（1-pentylcyclopropene，1-戊基环丙烯）和1-OCP（1-octylcyclopropene，1-辛基环丙烯）分别在室温下熏蒸处理青熟期软枣猕猴桃果实20 h后，用0.02 mm厚的PE果蔬专用保鲜袋将果实包装，常温条件[(20±1) ℃，RH 85~90%]贮藏，贮藏期间每5天测定一次果实的呼吸强度、硬度、好果率、Vc、可滴定酸含量、可溶性固形物、MDA含量、SOD及POD活性。结果表明，0.4、0.8、1.2 μL/L的1-MCP、1-PentCP和1-OCP均能有效推迟软枣猕猴桃果实呼吸高峰和SOD、POD活性高峰的出现，抑制硬度、好果率、可滴定酸含量的下降以及MDA的积累和可溶性固形物含量的上升，以1.2 μL/L 1-MCP作用效果较佳，其次是0.8 μL/L 1-OCP，再次为1.2 μL/L 1-PentCP。

Abstract:

Effect of treatment with 1-pentylcyclopropene (1-PentCP) and 1-octylcyclopropene (1-OCP), as ethylene action inhibitors, on post-harvest physiology and storage quality of Actinidia arguta was investigated, and the same concentrations of 1-methylecyclopropene (1-MCP) was as control. Fruits were respectively fumigated with 0.4, 0.8 or 1.2 μL/L 1-PentCP and 1-OCP at room temperature for 20 h. After fumigation, the treated fruits were packed with 0.02 mm thickness PE fruit bags, and stored at room temperature [(20±1) ℃, RH 85~90%] for ripening evaluation. Respiration intensity, firmness, Vc content, titratable acid content, soluble solids, MDA content, activity of SOD and POD were determined every five days during fruit storage. The results showed that all treatments significantly delayed the appearance of respiratory rate and SOD, POD activity peaks, suppressed fruit softening, decreased titratable acid content and good fruit rate, increased soluble solids content, and inhibited MDA accumulation during storage. Moreover, 1.2 μL/L 1-MCP showed the best effect, followed by 0.8 μL/L 1-OCP and 1.2 μL/L 1-PentCP.