Antioxidant activity of Solidago L. complex
The total antioxidant activity was evaluated by DPPH method on the dried plant raw material (leaves and inflorescences). We compared 13 samples grown from seeds at the experimental plots in the vicinity of Moscow belonging to 7 species: Solidago virgaurea L., S. altissima L. (= S. canadensis s.l), S. canadensis L. s.str, S. gigantea Aiton, S. × niederedery Khek. (= S. virgaurea × S. canadensis), S. × snarskisii Gudinskas & alneravičius (= S. virgaurea × S. gigantea), S. graminifolia (L.) Nutt. (=Euthamia graminifolia). The antioxidant activity of alcohol extracts for all specimen was very high. The total antioxidant activity in the leaves had 75.28-92.77% (methanol extracts), 44.34-91.52% (ethanol extracts) and 21.55-68.51% (water extracts). The total antioxidant activity in the inflorescences was 90.77-94.07% (methanol extracts), 90.20-95.66% (ethanol extracts) and 37.69-64.47% (water extracts). Alcohol extracts in all experiments had 2.5-3.0 times higher antioxidant activity than aqueous extracts. The lowest antioxidant activity both in alcohol and aqueous extract was shown by S. snarskisii (leaves). This taxon, in general, demonstrates the greatest variability of morphological and biochemical characters, which, apparently, is a reflection of its hybridity. The alcohol extracts from the leaves of both samples of S. graminifolia also show reliably lower antioxidant activity (84 vs. 91% in methanol and 85 vs. 90 in ethanol), which to some extent is an indirect confirmation of the correctness of its transfer to the genus Euthamia. Consequently, alien Solidago species, as well as their hybridogenic species S. × niederedery, are similar in antioxidant activity to the native S. virgaurea included in the official pharmacopeia. In this way, alien Solidago taxa are a potential source of useful bioactive compounds.
Vinogradova, Yu., Vergun, O., Grygorieva, O. and Brindza, J. (2021). Antioxidant activity of Solidago L. complex. Acta Hortic. 1324, 373-380
antioxidant activity, Solidago, alien species