Phenolic-chemical constituents, physical and color characteristics of pomegranates (Punica granatum L.) native to Jordan at full ripening stage: A comparative study

International Journal of Agriculture & Environmental Science

© 2020 by SSRG - IJAES Journal

Volume 7 Issue 6

Year of Publication : 2020

Authors : Soraya Mercedes Pérez

10.14445/23942568/IJAES-V7I6P109

How to Cite?

Soraya Mercedes Pérez, "Phenolic-chemical constituents, physical and color characteristics of pomegranates (Punica granatum L.) native to Jordan at full ripening stage: A comparative study," SSRG International Journal of Agriculture & Environmental Science, vol. 7,  no. 6, pp. 78-86, 2020. Crossref, https://doi.org/10.14445/23942568/IJAES-V7I6P109

Abstract:

The Punica granatum L. is interesting for different functional properties and high volumes of production. This work aims to compare the phenolic- chemical and physical parameters of two important commercial varieties of pomegranate. The fruits were collected from Abu Ziyad and Kafer Sawm valleys at the ripening stage. Chemical, spectrophotometric and colorimetric analyses were carried out. The properties evaluated shown significant differences (p≤0,5). The pomegranates from Kafer Sawm had a larger diameter (98,6 mm), sphericity (0,98), and arils juice yield (60,94%) with the low thickness of the rind (2,71mm). Its flavor presented more acidity (1,3%), less sweetness (15,8% Brix), and more redness. The concentration of phenolic compounds (TPC 454 mg GAE / 100 g), antioxidant activity (61,7%) and vitamin C content (10,15 mg / 100g) were also higher in Kafer Sawm samples. Its intense red hue, expressed in the “a” and “C” coordinates, is positively related to anthocyanin content. Where the redness records high values of the redness coordinate "a" (39,03 to 41,55) and Chroma "C" (42,22 to 42,72) and the anthocyanins content achieve about 402,5 mg as Cyannidine 3 glucoside / 100g). The content of total polyphenols (TPC) decreased when the maturity index increased. Exist inherence of color between arils and rinds, demonstrated by the anthocyanin content due to the osmotic-diffusional migration of the soluble compounds. The pomegranates from Kafer Sawm had a higher content of phenolic compounds and can be considered a better antioxidant source with higher functional abilities.

Keywords:

Anthocyanins, antioxidant capacity, CIELab, flavonoids, total phenols.

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