Antioxidant activity of the roots of rhodiola multiflorum and the catnip herb in Tajikistan

Abstract

Aim. To study antioxidant activity of roots and rhizomes of Rhodiola heterodonta Boriss, and herbs of Nepeta tythantha Pojark. Materials and methods. Roots and rhizomes of Rhodiola heterodonta Boriss and herbs of Nepeta tythantha Pojark served as a material for experiments. The amount of total phenols was determined using the Folin-Czocalteu reagent. The activity of antioxidants was determined by ABTS (2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) analysis. Results and discussion. The results obtained show that the content of polyphenols in Rhodiola multiflorum (1.45 %) is higher than in the herb Nepeta tythantha Pojark (1.05 %). As for the antioxidant activity, it was found that the extracts of both plants obtained on the basis of methanol (81.21 and 32.27 µg/ml, respectively), it was higher than the extracts obtained on the basis of ethanol (72.65 and 26.16 µg/ml, respectively). The antioxidant activity of an extract of rhodiola multiflorum roots and rhizomes based on ethanol and methanol (respectively 72.65 and 81.21 µg/mg), higher than that of catnip herb (respectively 26.16 and 32.27 µg/mg). Conclusions. The study showed that the roots and rhizomes of Rhodiola multiflorum and herb Nepeta tythantha Pojark have good antioxidant activity and can be a potential source of phytoantioxidant drugs.