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We evaluated the effects of preharvest 1-methylcyclopropene (1-MCP; HarvistaTM) or postharvest 1-MCP (SmartFreshTM) treatments on the physiological and biochemical responses of fruit quality attributes and enzymatic activities of cell wall hydrolases of ‘HetsalHaunkeybee’ peaches. The fruit were treated with either HarvistaTM via spraying 1 week before the harvest (preharvest treatment), or SmartFreshTM via fumigation immediately after the harvest (postharvest treatment). Then, fruits were stored at 10°C for up to 12 days. Flesh firmness of the fruit was significantly enhanced by postharvest treatment with SmartFreshTM, but not by the preharvest treatment with HarvistaTM. Neither HarvistaTM nor SmartFreshTM altered the soluble solids content, titratable acidity, or the peel color variables during cold storage. However, the SmartFreshTM treatment significantly reduced the enzymatic activities of α-galactosidase, β-galactosidase, β-glucosidase, β-arabinosidase, βxylosidase, and α-mannosidase during cold storage, compared to the untreated fruit and the HarvistaTM-treated fruit. Overall, the results suggest that postharvest SmartFreshTM treatment should be an effective method for peach fruit storage, and it enhances fruit quality by reducing the enzymatic activities related to cell wall hydrolysis and softening. Additional key words: cell wall hydrolases, ethylene, flesh firmness, fruit storability, Harvista

wonye gwahak gisulji/weon'ye gwahag gi'sulji

Effects of Preharvest and Postharvest 1-Methylcyclopropene Treatments on Fruit Quality Attributes and Cell Wall Metabolism during Short-term Cold Storage in ‘HetsalHaunkeybee’ Peaches