COMPARATIVE CONTENT OF ASCORBIC ACID, TANNINS, TOTAL ASH IN ABOVEGROUND AND UNDERGROUND ORGANS OF REPRESENTATIVES OF THE GENUS HOSTA TRATT.

The content of phenolic compounds (tannins), ascorbic acid, ash substances in leaves, flowers, roots of Hosta decorata, H. sieboldiana, H. lancifolia, H. crispula, H. undulata and two varieties: Stiletto, Night before Cristmas cultivated in the forest-steppe zone of Western Siberia was analyzed. Stable indicators were found in ascorbic acid leaves in the range of 11.01–11.90 mg/100 g. The content of tannins (2.01–2.24%) in the leaves of H. undulata, H. ventricosa, cultivar Stiletto is 2 times higher than that of H. decorata, H. sieboldiana, H. lancifolia, H. crispula, cultivar Night before Cristmas. It was established for the first time that in the flowers of H. sieboldiana and the Night before Cristmas variety, the content of ash substances, ascorbic acid, tannins is 1.5–2 times higher than H. crispula, H. undulata, H. ventricosa, H. decorata and Stiletto varieties. It was found that in the underground organs of H. decorata the concentration of tannins, ascorbic acid and ash substances is 1.5–2 times higher. In general, the adaptive ability of introduced species and varieties is manifested in the individual content of secondary metabolites and ash substances in vegetative and generative organs during the period of mass flowering of plants.