COMPARATIVE MORPHOLOGICAL AND BIOLOGICAL CHARACTERISTICS OF INULA HELENIUM IN NATURAL CONDITIONS

Green mass and rhizomes of Inula helenium L. are valuable raw materials of great practical importance as a promising source of BAS (biologically active substances). An analysis of plants’ morphological and biological parameters in natural populations makes it possible to determine the yield and, when harvesting raw materials, focus on cenopopulations with an increased phytomass of inflorescences. Assessing the dynamics of the formation of the aboveground phytomass, indicators of photosynthetic activity, the productivity of the aboveground mass, and seed productivity of I. helenium under natural conditions also make it possible to determine the influence of abiotic and biotic environmental factors. The studies were carried out in the laboratory of the Department of Biotechnology and Standardization of the Faculty of Biotechnology of the FSBEI HE “Mountain State Agrarian University” in medium samples of I. helenium, selected in natural cenopopulations of the Republic of North Ossetia - Alania at altitudes of 615 - 847 m above sea level in the plant association of a cereal-forb meadow. In the course of the study, morphological and biological indicators were determined. The authors found that the weight of the rhizome with roots decreases along the vertical profile. Inula helenium in cenopopulations grow at different heights from 127 to 220 cm and form an average of 230-390 g of rhizomes with roots. Individuals of Inula helenium are characterised by the formation of 24 - 26 inflorescences on average on one shoot, each giving 625 - 1015 pcs seeds from 1 basket. The authors took samples of elecampane high close to the villages Surkh-Digora and Chikola North Ossetia - Alania. These samples are characterised by a high weight of 1000 seeds (1834.78 - 1923.24 mg) and a basket diameter (6.98  - 7.29 cm).

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