8 research outputs found
La figue de Barbarie: valorisation dâun produit de terroir issu dâune culture adaptĂ©e aux dĂ©fis climatiques dans la rĂ©gion dâOuledDlim - Sud du Maroc
21-23 octobre 2014International audienc
Effects of different harvesting seasons on antioxidant activity and phenolic content of prickly pear cladode juice
The study was carried out to evaluate the effect of environmental conditions on the phenolic content and antioxidant activity of two distinct cladode genotypes under three sampling dates (spring, summer, and winter). The juice extracted from Opuntia ficus-indica (spineless) and Opuntia megacantha (spiny) genotypes was analyzed for their phenolics content and antioxidant activity using DPPH, ABTS, and FRAP methods. The composition of major phenolics substances of cladode juice harvested in March was determined by HPLC analysis. The average of the total phenolics content ranged from 455.65 to 542.70Â ÎŒg GAE mLâ1. The antioxidant activity varied from 1.78 to 4.10Â ÎŒmol TE mLâ1 by DPPH assay, 12.78â23.10Â ÎŒmol TE mLâ1 by ABTS assay and 1.74â3.33Â ÎŒmol TE mLâ1 by FRAP assay. Higher values of antioxidant activity and polyphenols content were registered in summer. O. ficus-indica recorded significantly higher values for the parameters compared to O. megacantha. Keywords: Prickly pear cactus, Opuntia ficus-indica, Opuntia megacantha, Cladode juice, Antioxidant activity, Polyphenol