Valorization of three varieties of grape |
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| Authors: | Moufida Saï dani Tounsi, Ines Ouerghemmi, Wissem Aidi Wannes, Riadh Ksouri, Hassene Zemni, Brahim Marzouk,Mohamed Elyes Kchouk |
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| Affiliation: | aUnity of Aromatic & Medicinal Plants, Biotechnological Center, Technopark of Borj-Cedria, 2050 Hammam-Lif, Tunisia;bLaboratoire d’Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie à la Technopole de Borj-Cédria (CBBC), BP 901, 2050 Hammam-lif, Tunisia;cLaboratoire de Physiologie Moléculaire de Vigne, Centre de Biotechnologie à la Technopôle de Borj-Cédria (CBBC), BP 90, 2050 Hammam-lif, Tunisia |
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| Abstract: | In the present investigation, seed methanolic extracts of three Vitis vinifera (Muscat d’Italie, Syrah and Carignan) were assayed for their antioxidant activities. Results showed that there are strong variations in the contents of total phenols (440.97–121.94 mg GAE g−1 DW), flavonoids (48.07–16.81 mg EC g−1 DW) and tanins (37.15–14.9 mg EC g−1 DW) from the studied seeds. The phenolic composition of these extracts was determined by RP–HPLC after acid hydrolysis. The main phenolic compound was quercetin with 27.2% in Muscat d’Italie, 48.8% in Syrah and 28.4% in Carignan. Besides, all seed extracts showed remarkable DPPH radical scavenging activity with IC50 values ranged from 1.8 to 30 μg ml−1. EC50 values of reducing power activity ranged from 100 to 120 μg ml−1. The high phenolic content and the considerable antioxidant activities of vitis seed extracts could potentially be considered as an expensive source of natural antioxidants. |
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| Keywords: | Vitis vinifera Seeds Polyphenols Antioxidant activities Carignan Syrah Muscat d’ Italie |
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