Hylotelephium Spectabile (Boreau) H. Ohba x Telephium (L.) H.Ohba Leaf and Flower Extracts: Composition, Antioxidant and Antibacterial Activity

Composition, antioxidant and antibacterial activities for methanol extracts, and their hexane, ethyl acetate and butanol fractions of the fresh leaf and flower of Hylotelephium spectabile x telephium were studied for the first time. The extracts contain mostly quercetin and kaempferol glycosides, as confirmed by the composition of hydrolysates whose main components were quercetin and kaempferol. Evaluations of antioxidant activity were done by the following assays: DPPH, ABTS and total reducing power assay (Fe 3+ to Fe 2+). Additionally, total flavonoid content and total phenols were determined. The antioxidant capacity of ethyl acetate flower fraction was very close or even higher than capacity of used standard antioxidants. Presented results qualify this species as a potential new source of antioxidant substances. Ethyl acetate fraction of leaf showed moderate bactericidal activity against P. aeruginosa, S. typhimurium, S. aureus, and B. subtilis.