Postharvest treatment with calcium delayed ripening and enhanced bioactive compounds and antioxidant activity of 'Cristalina' sweet cherry
Sweet cherry (Prunus avium L. 'Cristalina') fruits were harvested at commercial ripening and transferred immediately at laboratory. Fruits were selected for the following treatment: control (distilled water) and calcium chloride at 1 mM. Both treatments were performed under vacuum-infiltration and cherries stored for 21 days. On a weekly basis, samples were taken out from the cold chamber for analytical determinations. Evaluation of quality parameters (weight loss, total soluble solids, acidity, firmness, and colour) revealed that control cherries showed acceleration in the changes of these parameters while in those fruits treated with Ca2+ retardation was observed. In addition, accumulation of total phenolics, total anthocyanins and total carotenoids was also delayed over storage, although final concentrations were always higher in treated than in control cherries. In conclusion, the application of calcium solutions could be a good tool for postharvest application with the aim to retard the postharvest ripening process of sweet cherry and in turn to extend the storability of this perishable fruit. Interestingly, at the end of storage treated cherries showed higher antioxidant activity, in both hydrophilic and lipophilic fractions than control fruits.
Díaz-Mula, H.M., Valero, D., Guillén, F., Valverde, J.M., Zapata, P.J. and Serrano, M. (2017). Postharvest treatment with calcium delayed ripening and enhanced bioactive compounds and antioxidant activity of 'Cristalina' sweet cherry. Acta Hortic. 1161, 511-514
cherry quality, bioactive compounds, calcium treatments, postharvest storage