Valorisation de plantes médécinale : approche théorique et expérimental

Abstract

Licorice (Glycyrrhiza glabra) and hottentot fig (Carpobrotus edulis L.), belonging respectively to the Fabaceae and Aizoaceae families, are medicinal plants with a long history of use in traditional medicine. They have been recognized for centuries for their numerous therapeutic properties, which are significant in traditional pharmacopoeia. The present study evaluated the antioxidant power of extracts obtained by the mace- ration extraction method. We observed that the yield of hydro-methanolic extraction was 48.88% for licorice and 30.65% for hottentot fig, indicating the respective yields for each plant. The results show that licorice has a high concentration of polyphenols (73.22 mg/g) and flavonoids (62.54 mg/g), with significant antioxidant capacities mea- sured by DPPH (236.57 ± 15.4) and ABTS (261.54 ± 22.7). In contrast, the Hottentot fig shows a concentration of 30.65 mg/g of tannins and antioxidant capacities measured by FRAP (145.8 ± 9.29) and DPPH (13.08 ± 2.1). Moreover, both plants show an ab- sence of terpenoids, cyanogenic compounds, catechic tannins, sterols, and triterpenes. These results confirm the richness of these plants in bioactive compounds and their therapeutic potential, justifying their traditional use and encouraging future research to optimize their medical and pharmaceutical applications