Table 1.
Total phenolic compounds and antioxidant activities of S. altissima and S. alpina extracts determined by reducing power (FRAP), the DPPH scavenging assay and inhibition of linoleic acid peroxidation (TBARS detection).
| Plant Material | Total Flavonoid Content * | FRAP µM Fe(II)/g Dry Extract | DPPH Assay EC50 (µg/mL) ** | % Inhibition Lipid Peroxidation |
|---|---|---|---|---|
| S. altissima shoots | 14.01 ± 0.15 a | 391.66 ± 6.13 c | 102.68 ± 3.91 d | 29.76 ± 1.19 d |
| S. altissima roots | 13.83 ± 0.13 a | 368.37 ± 7.23 d | 82.94 ± 0.45 c | 36.90 ± 0.84 c |
| S. alpina shoots | 25.05 ± 0.43 b | 669.63 ± 11.07 b | 71.26 ± 0.34 b | 51.85 ± 3.75 b |
| S. alpina roots | 27.16 ± 0.87 b | 717.60 ± 1.35 a | 68. 98 ±0.30 a | 60.32 ± 1.61 a |
* Expressed as quercetin equivalents (mg per gram of dry extract). ** EC50, the concentration of the sample (μg/mL) showing 50% of maximal radical scavenging activity. The means with the same letter for the same assay do not differ significantly according to the Kruskal-Wallis test (p ≤ 0.05). The values are the means of six replicates ± SE.