Anti-oxidative Activity in Some Tropical Fruits during Refrigerated Storage and its Relationship to Cold Tolerance

Angel Guadarrama

Abstract


Fruits contain compounds which are secondary metabolites with antioxidant activity that could be beneficial to cope with stress by cold. The aim of this work is to study the antioxidant capacity of papaya, mango, vinagrillo (Averrhoa bilimbi) and calamondin fruits and its relationship to cold tolerance during cold storage under refrigerated conditions at 4-6 oC and 90-95% RH. The activity and total antioxidant capacity were determined comparatively by three methods: ABTS (2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid), DPPH (1,1-diphenyl-2-picrylhydrazyl) and DMPD (N, N-dimethyl-p-phenylenediamine). Ascorbic acid was used as a reference antioxidant. The antioxidant capacity obtained by DPPH, ABTS and DMPD methods is correlated to cold tolerance in refrigerated fruits. Results showed a relationship between the antioxidant capacity and the days of symptom onset of chilling injury during cold storage. Vinagrillo and calamondin fruits with lower antioxidant capacity were more susceptible to cold in relation to papaya and mango fruits with higher one.

Keywords


Chilling Injury, Papaya, Mango, Averrhoa Bilimbi and Calamondin Fruits, Cold Storage

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