CHEMICAL COMPOSITION AND ANTIOXIDANT ACTIVITIES OF TANNINS EXTRACT FROM ALOE SAPONARIA

Abstract

The objective of this work was to study the chemical composition and antioxidant activity of tannins extract of Aloe saponaria (TEAS). The Aloe saponaria (syn. Aloe maculata) is a succulent plant belonging to the Xanthorrhoeaceae family, this succulent plant native to South Africa was introduced in Morocco as an ornamental plant, rustic and easy to grow. In order to ensure this, morphological and histological study method of the species, phytochemical screening, characterization of TEAS by gas chromatography coupled to mass spectrometry (GC/MS), and the study of antioxidant activity by two methods (2,2-diphenyl-1-picrylhydrazyl (DPPH) and total antioxidant capacity (TAC) assays) were examined. The results of phytochemical screening indicated that the Aloe saponaria leaf was rich of alkaloids, tannins catechics, flavonoids, sterols, triterpenes, oses, holosides, mucilages and reducing sugars. In addition, the main constituents of TEAS identified by GC/MS analysis were Linolenic acid (32.22%), Palmitic acid (17.42%), and Phytol (11.30%). Regarding antioxidant activity, the TEAS showed a significant antioxidant effect.