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American Journal of Agricultural and Biological Sciences
Year: 2010  |  Volume: 5  |  Issue: 3  |  Page No.: 342 - 349

Novel Postharvest Treatment Reduces Ascorbic Acid Losses in Mango (Mangifera indica L.) Var. Kent

Maria A. Islas-Osuna, Norma A. Stephens-Camacho, Carmen A. Contreras-Vergara, Marisela Rivera-Dominguez, Ernesto Sanchez-Sanchez, Monica A. Villegas-Ochoa and Gustavo A. Gonzalez-Aguilar    

Abstract: Problem statement: Mango is a tropical fruit that ripens very quickly; for this reason, there has been a continuous effort to develop postharvest technologies to extend its shelf life and quality. Among them, 1-Methylcyclopropene (1-MCP) is widely used because it inhibits the action of ethylene receptors. Approach: Changes in physicochemical parameters, bioactive compounds and cell wall degrading activities were evaluated during storage and ripening of fresh whole mangoes treated with 1-MCP (750 nL L-1). Mature-green mangoes, cultivar Kent, untreated or treated with 1-MCP were evaluated for external quality, phytochemicals, Polygalacturonase (PG) and Pectin Methylesterase (PME) enzymatic activities during storage at 20°C for 2 weeks. Results: Concentration of ascorbic acid decreased during fruit ripening but 1-MCP-treated mangoes had reduced losses. Polygalacturonase and pectin methylesterase activities were reduced in the treated fruits as compared to untreated mangoes. Small changes in β-carotene were observed between treated and untreated fruits. Conclusion: 1-MCP affected the ripening process in "Kent" mango, reducing losses of ascorbic acid, this treatment is justified since it helps to maintain mango’s nutritional value during its shelf life.

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