Study On The Mechanism Of 1-Methylcyclopropene (1-MCP) For Keeping Quality And Fruit Firmness In Kiwifruit

In this study, Wan Cui kiwifruit (Actinidia deliciosa cv. Wancui), 815 kiwifruit (Actinidia deliciosa cv. T815) and Hayward kiwifruit (Actinidia deliciosa cv. Hayward) for the experimental materials to study the postharvest treatment of different concentrations (0.1μL / L, 1μL / L, 10μL / L) of 1-MCP on kiwifruit, in the refrigerator (2℃) Storage temperature. By determining respiratory rate, ethylene production, fruit firmness, titratable acid, soluble solids content , total sugar, VC content, pectin content and pectinase activity, starch content and amylase activity, weight loss and good fruit rate, the low temperature storage characteristics of these three varieties of kiwifruit were invested , the best concentrations of 1-MCP in three different kiwifruit were selected and the mechanism of 1-MCP to maintain the quality and hardness were invested as well, which provide theoretical and practical basis for storage of Anhui's kiwifruit and the wide use of the 1-MCP at different kinds of kiwifruits.The results showed that:(1) During storage at 2℃temperature, the respiratory physiology and quality of three varieties of kiwifruit totally have similar trend, but there are differences among the varieties. 815 is nonstorability, Hayward and Wan Cui kiwifruit are fit for longterm storage.(2) Though effect of 1-MCP on Physiology ,1-MCP can keep quality and extend the storage time of kiwifruit .For Hayward kiwifruit, 1μl/L 1-MCP have the best effection; Wan Cui , 0.1μl/L1-MCP the best; 815 , 10μl / L1-MCP has better results , and as the higher the concentration, the better of the results.(3) 1-MCP directly inhibited respiratory physiology of kiwifruit, reducing the activity of amylase and PG, thereby delaying the decline of fruit firmness. During the period of rapid decline of fruit firmness, the amylase plays a major role, while pectinase in the storage medium, the two both participate in the process of softening.In adition,the mildew and rot at end of storage because 1-MCP does not have bacteriostasis antibiotic effects, the better research that will be combined of antiseptic in the future.