Effect of chitosan salts in post-harvest quality of mango ‘Tommy Atkins’
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Abstract
Mango fruits have climacteric respiratory pattern and anthracnose disease affects their quality, so they have a short shelf life. Given the trends in fruit consumption without chemical residues, alternatives are sought to extend the post-harvest life, such as bioactive products. Chitin is an abundant biopolymer in the exoskeleton of crustaceans and mollusks. Chitosan have fungal properties and ability to form semi permeable films. The aim of this study was to evaluate the effect of chitosan lactate and acetate salts on post-harvest quality of mango ‘Tommy Atkins’. Fruits were submerged in chitosan salts at 15 and 20 g L-1and stored at 14 ± 1 °C for 12 days. At the storage end the incidence and severity were determined by anthracnose (%) and effectiveness of treatments, furthermore fresh mass loss (%), SST (°Brix), titratable acidity (%) and pH were determined. The incidence and severity of anthracnose decreased with the two salts, the acetate at 20 g L-1 exhibited 71,15 % effectiveness in disease control. The mass losses were greater than 5,53 % for the two salts without differences with the control. Lactate at two concentrations has a normal fruit ripening and with acetate, physiological process was delayed, evidenced in the maturity indicators and the presence of strange flavors.These results showed the potential of chitosan salts in the control of anthracnose and quality postharvest of fruits.
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