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Issue 10 (4) 2011 pp. 443-454

Aleksandra Duda-Chodak, Tomasz Tarko, Tadeusz Tuszyński

University of Agriculture in Krakow

Antioxidant activity of apples – an impact of maturity stage and fruit part

Abstract

 

Background. Recently, many studies have been oriented towards improving methods and efficiency of antioxidants recovery from different fruit and their wastes.The aim of the study was to evaluate antioxidant potential of apple seeds and peel, which constitute the fruit industry wastes, and compare it to apple flesh. Antioxidant activity of apples at different maturity and storage stage were analysed too.
Material and methods. The Idared and the Šampion cultivars of apples were used in the study. Antioxidant activity was estimated using ABTS and DPPH assays, and polyphenols profile was determined by HPLC method.
Results. Seeds of analysed apple cultivars were characterised by a significantly higher antioxidant capacity and by higher concentrations of polyphenols analysed when compared to their peel and flesh. There were present two predominant compounds: phloridzin in seeds (84% and 72%) and quercetin glycosides in peels (54% and 38%, Idared and Šampion cultivars, respectively). No quercetin glycosides in seeds were found. The capacity to scavenge an ABTS radical, but not DPPH, decreased during ripening of apples, while cold storage resulted in enhanced antioxidant potential.
Conclusion. It can be concluded that unripe apples together with apple seeds and peel (fruit industry wastes) constitute a valuable source of polyphenols.

 

Keywords: antioxidant capacity, HPLC, maturity stage of fruit, peel, polyphenols, seeds
pub/.pdf Full text available in english in Adobe Acrobat format:
http://www.food.actapol.net/issue4/volume/3_4_2011.pdf

For citation:

MLA Duda-Chodak, Aleksandra, et al. "Antioxidant activity of apples – an impact of maturity stage and fruit part." Acta Sci.Pol. Technol. Aliment. 10.4 (2011): 443-454.
APA Duda-Chodak A., Tarko T., Tuszyński T. (2011). Antioxidant activity of apples – an impact of maturity stage and fruit part. Acta Sci.Pol. Technol. Aliment. 10 (4), 443-454
ISO 690 DUDA-CHODAK, Aleksandra, TARKO, Tomasz, TUSZYńSKI, Tadeusz. Antioxidant activity of apples – an impact of maturity stage and fruit part. Acta Sci.Pol. Technol. Aliment., 2011, 10.4: 443-454.