Phenolic and flavonoid contents and antioxidant activity of Tourneuxia variifolia Coss. extracts (Asteraceae)
Keywords:
Tourneuxia variifolia;, antioxidant activity, phenolic content, flavonoid contentAbstract
In this study, the ethyl acetate and n-butanol extracts of the north africa endemic species Tourneuxia variifolia Coss. Were used to
evaluate the antioxidant activity using DPPH radical scavenging activity, ABTS+° decolorization, Cupric reducing power and reducing
power in vitro essays and their phenolic content were also measured. The amounts of total phenolic and flavonoid contents were higher
in ethyl acetate extract (979.5±3,53
mgGAE and 182±2.32 mgQE, respectively). However; EtOAc extract possessed a strong antioxidant
activity in DPPH, ABTS and reducing power tests (IC50 =13.8±0.33; 5.18± 0.37; 23.85 ±2.88) whereas CUPRAC test (IC50 =204±
2.47μg/ml)