Effect of Chitosan Coating and Calcium Treatments on Browning and Two Enzyme Activities of Mango

Took the Guire 82 mango as an experiment.It was processed with calcium treatment and chitosan coating before storage.The results showed that chitosan coating combined with various contents of calcium can inhibit the yellowing rate,yellowing index and the browning degree of pericarp or pulp and stop activities of polyphenoloxidase(PPO) and peroxidae(POD) from increasing.It can also reduce the rot index and enhance disease resistance of fruit.And,hereinto,the treatment of 1%CaCl2 +1% chitosan coating and the treatment of 3%CaCl2 +1% chitosan coating can enhance the rot index,disease resistance and quality of mango during the storage,and by the treatment of 1%CaCl2 +1% chitosan the best storage will be achieved.