The main groups of biologically active substances in plants of Hemerocallis L. species

Abstract. Wild species of the genus Hemerocallis L. – family Hemerocallidaceae Br. – are of value as ornamental, food and medicinal plants. Biologically active substances of the species composition of lilies growing in natural habitats have not been studied enough. There is no information on the quantitative content of the main groups of biologically active substances in the five types of lilac cultivated in the forest-steppe zone of the Novosibirsk region over the two growing seasons, which determines the originality and significance of this work. The purpose of the study is a comparative study of the content of the main groups of biologically active substances (BAS) in plants of five species of lilac cultivated in the forest-steppe zone of Western Siberia. Methods. A spectrophotometric method was used to determine flavonols, catechins, carotenoids; carbazole-free – for the determination of pectins and protopectins; titrimetric – for the determination of tannins. Results. Comparative analysis of BAV in flowers and leaves of five species of lilac allowed to establish that in leaves the content of catechins (1.1–1.3 times), flavonols (2.0 times), tannins (1.6–2.3 times) is higher than in flowers. The content of pectins is higher in flowers (1.7–3.3 times), protopectins (1.4 times), carotenoids (3.7–34.4 times). The concentration of protopectins in leaves and flowers of all species is 1,4–5.1 times higher compared to pectins. H. minor (flavonols, pectins), H. middendorffii (tannins, catechins, carotenoids), H. citrina (catechins), H. fulva (tannins), H. lilio-asphodelus (pectins) were distinguished by high indications for individual components in various organs. Species specificity of accumulation of these components in flowers and leaves during the period of mass flowering and specificity of their content over two growing periods has been established. Scientific novelty. For the first time in the conditions of the forest-steppe zone of the Novosibirsk region, a comparative quantitative analysis of the content of phenolic compounds, pectin substances, carotenoids in the aboveground organs of H. lilio-asphodelus, H. minor, H. middendorffii, H. citrina, H. fulva during the growing season of 2019–2020 was carried out.