ANTIOXIDANT ACTIVITY OF OPUNTIA FICUS-INDICA FLOWERS PHENOLIC EXTRACTSAbstract
The cactus plant Oputia ficus-indica, is a member of the Cactaceae family, native to Mexico, mainly cultivated for its cladodes, flowers, and fruits. Opuntia flower is useful in numerous fields; such as traditional medicines. Phenolic Flowers extracts of opuntia ficus-indica were phytochemical studied and in-vitro tested for their potential antioxydant activity using four methods, the total antioxidant capacity, reducing power, DPPH radical scavenging activity, and β-carotene bleaching assay. The results showed the flowers richness by phenolic compounds and flavonoids (120.22mgGAE/gDW, 62.67mgGAE/gDW) and the different levels of high antioxidant properties for all extracts specially for the flavonoid ethyl acetate extract which showed the highest activity to reducing power, to scavenge DPPH radical with an IC50 of 0.27 mg.mL-1 and to inhibit the oxidation of β-carotene with an IC50 of 0.39 mg mL-1, the latter is better than the capacity to inhibiting the oxidation of β-carotene of ascorbic acid whose IC50 = 0.43 mgmL-1. Hence, the Opuntia flowers provide a source of natural antioxidant, suggesting that it may be considered as a potential candidate of possible health-promoting functional foods.
H. Dib *, M. Belarbi, M. C. Beghdad and M. Seladji
Laboratory of Natural Products, Department of Biology, Faculty of Sciences of the Nature and the life, University of Tlemcen, Algeria.
01 April 2014
22 May 2014
17 July 2014
01 October 2014