Table 1.
Bioactive compounds and in vitro antioxidant activity of young and old leaf extracts of S. europaea.
| S. europaea Leaves Extract | |||
|---|---|---|---|
| Young Leaves | Old Leaves | ||
| Bioactive compounds | Total polyphenols (mg GAE/g DW) | 8.53 a ± 0.41 | 4.26 b ± 0.12 |
| Total flavonoids (mg CE/g DW) | 0.51 a ± 0.08 | 0.14 b ± 0.05 | |
| Flavonols (mg QE/g DW) | 0.11 a ± 0.01 | 0.05 b ± 0.01 | |
| Anthocyanins (mg C3GE/g DW) | 0.18 a ± 0.01 | 0.10 b ± 0.00 | |
| Pigments | Chlorophyll a (µg Chl a/g FW) | 465.30 a ± 10.43 | 407.80 b ± 9.97 |
| Chlorophyll b (µg Chl b/g FW) | 233.40 a ± 15.48 | 157.80 b ± 12.14 | |
| Carotenoids (µg/g FW) | 106.70 a ± 2.12 | 102.6 a ± 1.73 | |
| Antioxidant activity | DPPH (ARA %) | 79.51 a ± 0.45 | 60.57 b ± 0.33 |
| FRAP (EC50, mg/mL) | 6.79 a ± 0.44 | 3.37 b ± 0.10 | |
| ORAC (µmol TE/g DW) | 268.08 a ± 21.10 | 164.88 b ± 29.13 | |
Values are reported as means ± SD of three replicates (n = 3). Values within each row different letters (a,b) are significantly different with Student’s t-test (p ≤ 0.05).