Table 2.
IC50 values of various Lavandula x intermedia ‘Budrovka’ (LiB) and L. angustifolia (La) extracts, their constituent rosmarinic acid and references.
| Extracts | IC50* (µg/mL) | Total antioxidant capacity (mg AAE/g) | ||||
|---|---|---|---|---|---|---|
| DPPH· scavenging activity | Iron chelating activity | Reducing power | Inhibition of lipid peroxidation | |||
| LiB | flower | 17.17 ± 0.33 | 397.71 ± 10.26 | 33.78 ± 2.34 | 116.54 ± 9.96 | 294.00 ± 13.17 |
| infl. stalk | 45.25 ± 0.10 | 294.08 ± 12.86 | 66.92 ± 3.75 | 283.54 ± 5.02 | 240.75 ± 13.08 | |
| leaf | 15.06 ± 0.74 | 383.59 ± 15.55 | 28.73 ± 1.61 | 74.56 ± 4.71 | 290.75 ± 8.99 | |
| La | flower | 11.37 ± 0.69 | 319.21 ± 21.96 | 25.17 ± 0.16 | 89.36 ± 5.00 | 261.50 ± 7.07 |
| infl. stalk | 33.95 ± 1.42 | 236.92 ± 10.19 | 55.22 ± 1.10 | 240.48 ± 11.00 | 238.08 ± 8.38 | |
| leaf | 10.62 ± 0.02 | 302.79 ± 7.61 | 24.26 ± 0.76 | 54.57 ± 4.42 | 274.18 ± 5.07 | |
| Rosmarinic acid | 1.51 ± 0.07 | NA | 1.26 ± 0.14 | 9.18 ± 0.01 | 1064.47 ± 53.52 | |
| BHT | 6.45 ± 0.53 | NA | 4.64 ± 0.31 | - | 414.74 ± 36.81 | |
| EDTA | - | 13.37 ± 0.91 | - | - | ||
| Fisetin | - | - | - | 5.42 ± 0.60 | ||
* IC50 value = concentration at which the DPPH radicals were scavenged by 50%, iron(II) ions were chelated by 50%, absorbance was 0.5 for reducing power and lipid peroxidation was inhibited by 50%, respectively; Each value is expressed as mean ± s.d. (n = 3); NA = not active; - = not tested.