Ecological variability of the phenolic compounds of Olea europaea L. leaves from natural habitats and cultivated conditions

Figures & data

Table 1. Total quantity of phenolic compounds in the extracts (E type 1) and plant material (E type 2) of O. europaea samples.

Locality	Plant extract (Е type 1)	Plant material (Е type 2)
Tunisia	205.17 ± 0.04	67.40 ± 0.01
Malta	149.23 ± 0.11	61.77 ± 0.02
Montenegro	127.18 ± 0.03	51.71 ± 0.01
France	314.69 ± 0.12	79.77 ± 0.04
Serbia	249.31 ± 0.08	71.29 ± 0.03

Note: Values presented as equivalents of gallic acid, mg of GA/g of extract, i.e. plant material. Values are means (±SD) from three experiments.

Table 2. Flavonoid concentration in the extracts (Е type 1) and plant material (Е type 2) in О. еuropaea samples.

Locality	Plant extract (Е type 1)	Plant material (Е type 2)
Tunisia	119.79 ± 0.08	22.73 ± 0.01
Malta	55.85 ± 0.02	25.79 ± 0.03
Montenegro	52.40 ± 0.04	22.22 ± 0.01
France	103.77 ± 0.05	26.67 ± 0.01
Serbia	129.39 ± 0.06	37.98 ± 0.02

Note: Values are presented as rutin equivalents, mg of Ru/g of extract, i.e. plant material. Values are means (±SD) from three experiments.

Table 3. Antioxidant activity (IC₅₀ values expressed as µg/mL) of the О. еuropaea extracts (Е type 1) and plant material (Е type 2).

Locality	Plant extract (E type 1)	Plant material (E type 2)
Tunisia	30.04 ± 0.92	105.44 ± 1.56
Malta	35.49 ± 0.85	129.26 ± 1.22
Montenegro	75.91 ± 0.77	231.39 ± 1.65
France	113.30 ± 1.12	211.55 ± 1.89
Serbia	94.39 ± 1.03	160.71 ± 1.23

Note: Values are means (±SD) from three experiments.