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Article

Polyphenolic Composition in Different Organs of Tunisia Populations of Cynara Cardunculus.L and Their Antioxidant Activity

1Laboratoire de Biodiversité, Biotechnologies et Changements Climatiques, Faculté des Sciences de Tunis, Université de Tunis El Manar, El Manar, Tunis

2Laboratoire d’Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologies de Borj Cedria, Technopôle de Borj-Cedria (CBBC), Hammam-Lif, Tunis


Journal of Food and Nutrition Research. 2013, Vol. 1 No. 1, 1-6
DOI: 10.12691/jfnr-1-1-1
Copyright © 2013 Science and Education Publishing

Cite this paper:
Khaldi Soumaya, Feten Chaouachi, Riadh Ksouri, Mohamed El Gazzah. Polyphenolic Composition in Different Organs of Tunisia Populations of Cynara Cardunculus.L and Their Antioxidant Activity. Journal of Food and Nutrition Research. 2013; 1(1):1-6. doi: 10.12691/jfnr-1-1-1.

Correspondence to: Khaldi Soumaya, Laboratoire de Biodiversité, Biotechnologies et Changements Climatiques, Faculté des Sciences de Tunis, Université de Tunis El Manar, El Manar, Tunis. Email: khaldi.soumaya@yahoo.fr

Abstract

Polyphenols are biologically active molecules that contribute to development and cell growth. This study compared phenolic contents and antioxidant activity of stems and seeds in six Tunisian wild cardoon populations and one population of cultivated cardoon and artichoke located in the north of Tunisia. The analyzed organs exhibited different total polyphenol contents (1.49– 23.25 mg gallic acid equivalents, GAE g-1 DW). The seeds phenolic and tannins contents were higher than those in stems. The globe artichoke stem phenolic and flavonoid contents were higher than those in wild and cultivated cardoons. Seed extracts displayed the highest DPPH scavenging ability with the lowest IC50 value (3 μg ml1), followed by globe artichoke stems (12 μg ml1). In contrast, stems showed the highest capacity to quench superoxide (IC50: 2.1 μg ml1) as compared to seeds (5.6 μg ml1). These results confirm the beneficial effect of Cynara cardunculus.L organs on human health due to their high antioxidant activity.

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