Phenolics content and antioxidant activity of three Sorbus species

Abstract

The phenolic content and antioxidant activity of Sorbus aucuparia L., Sorbus aria (L.) Crantz and Sorbus austriaca (Beck) Hedlund leaves and fruit were investigated. The quantification of total phenolics, flavonoids and phenolic acids was performed using the Folin–Ciocalteu, Dowd and Arnow methods, respectively. The antioxidant activity of the extracts was evaluated using DPPH, TEAC and FRAP methods with Trolox as a standard. Leaves had a higher content of phenolic compounds and antioxidant activity than the fruits for all species. The highest content of phenolics (76.11 mg gallic acid equivalents (GAE)/g plant), flavonoids (15.86 mg rutin equivalents (RE)/g plant) and phenolic acids (44.54 mg caffeic acid equivalents (CAE)/g plant) was determined for S. austriaca leaves. Sorbus austriaca fruit had the highest content of phenolics (13.21 mg GAE/g plant), flavonoids (1.82 mg RE/g plant) and S. aucuparia fruit had the highest content of phenolic acids (9.05 mg CAE/g plant). The antioxidant activity was in the range: DPPH=38.42–274.52 μmol Trolox equivalents (TE)/g plant; TEAC=43.23–403.02 μmol TE/g plant; FRAP=47.13–706.96 μmol TE/g plant. The highest values of antioxidant activity were found for S. austriaca leaf and fruit extracts while the lowest values were determined for S. aucuparia leaves and S. aria fruit. The antioxidant activity was highly correlated with total phenolics and phenolic acids.

Investigating In Vitro Antioxidant and Antimicrobial Activity of Different Sorbus Species in Artvin Province of Türkiye

“…As a result of their phenolic contents, various Sorbus species were reported to have hypoglycemic, diuretic, vasoprotective, anti-inflammatory and antidiarrheal properties (Tahirovic et al, 2019) and antioxidant activities (Hukkanen et al, 2006). Due to the linear relationship between phenolic compounds and antioxidant activity and due to the antioxidant activity and capacity of these compounds to neutralize reactive oxygen types, they are considered to be beneficial in sustaining human health and preventing diseases (Olszewska et al, 2010).…”