16. The degradation of VC was postponed and the VC contents in experimental groups exceeded 20% comparing CK. The rate of transformation of pectin slowed down too; the soluble pectin content of experimental groups was 0.25% lower than that of CK on day 16. These results suggest that the bentonite coatings affected the fruits’ metabolic activity. The coating inhibits mass transfer of water and gases such as carbon dioxide and oxygen. It also could absorb ethylene formed during the ripening and decay processes of fruit. Therefore, the appearance of the mangos was preserved and
shelf life was extended at room temperature. Bentonite/potassium sorbate coatings on mango showed the best results in all tested quality and physiological indexes, it is inferred to be the combined effect of bentonite and potassium sorbate.