AI Article Synopsis
- The study quantified phenolics, flavonoids, anthocyanins, and tannins from 9 Tunisian pomegranate ecotypes, finding Tounsi (TN) had higher phenolics and flavonoids than Gabsi (GB).
- GB 2 had the highest anthocyanins, while TN 3 had the most tannins, and TN 1 showed the strongest radical-scavenging activity and micronutrient levels.
- A strong correlation was noted between antioxidant capacity and proanthocyanin content, indicating their key role in pomegranate’s antioxidant properties, and the presence of potassium and sodium may help pomegranates thrive in dry conditions.
Article Abstract
Phenolics, flavonoids, anthocyanins, and tannins of pomegranate juices, obtained from 9 Tunisian ecotypes were quantified. Phenolics and flavonoids in the variety Tounsi (TN) (3299 mg gallic acid equivalents [GAE]/L and 636 mg quercetin equivalents [QE]/L of juice, respectively) were higher than in the variety Gabsi (GB) (1570 mg GAE/L and 135 mg QE/L of juice, respectively). The highest anthocyanins quantity was found in GB 2 with 156 mg cyanidin-3-glucoside equivalents (CGE)/L. TN 3 ecotype showed the highest tannins quantity with 2550 mg catechin equivalents (CE)/L of juice. TN 1 presented the highest radical-scavenging activity (2, 2'-azinobis-3-ethylbenzothiazoline-6-sulphonate [ABTS], IC₅₀ [50% inhibition concentration] = 525 mg/L), as well as the highest concentration of micronutrient cations (potassium and sodium). A high correlation (R² = 0.80) between antioxidant capacity and proanthocyanin contents was found, this suggests that proanthocyanins are the principal contributor in the antioxidant capacity of pomegranate. Our data suggest also that the high concentrations of K⁺ and Na⁺ may play a role in the adaptation of pomegranate to arid environments.
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| http://dx.doi.org/10.1111/j.1750-3841.2011.02211.x | DOI Listing |
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