Content of anthocyanins and tannins in above- and belowground organs of some Geranium (Geraniaceae) species from Buryatia

The article provides results of the research on the total content of anthocyanins compared to the tannins in the aerial and underground parts of five Geranium L. species (G. pratense L., G. sergievskajae (Peschkova) Troshkina, G. affine Ledeb. (= G. transbaicalicum subsp. turczaninovii (Serg.) Peschkova), G. pseudosibiricum J. Mayer, G. eriostemon Fisch. ex DC.) growing in Buryatia. The average content of anthocyanins in the shoots of the studied species is 0.04–0.07%, and in the roots – 0.03–0.06%. The average content of tannins in the aerial parts of the plants varies from 18 to 23%, and in the underground parts – from 20 to 31%. No clear relationship was found between the content of anthocyanins and tannins.