Figure 6.

Antioxidant activity of extracts of various plant parts of R. crispus and R. obtusifolius (according to the 2,2’azinobis(3)ethylbenzthiazoline-6-sulfonic acid (ABTS) method) at the flowering and fruiting stages (a), antioxidant activity according for vertical distribution at flowering stage (b) and at fruiting stage (c). Different lower case letters indicate significant differences among plant parts of R. crispus; upper case letters indicate significant differences among plant parts of R. obtusifolius (p ≤ 0.05); asterisk * indicates significant differences among sorrel species (p ≤ 0.05) based on post hoc Tukey’s tests separately for each growth stage.