Introduction. Natural biologically active substances (BAS) are distinguished by different polarity, which determines their physicochemical properties, including solubility. When using solvents of different polarity, it is possible to influence the spectrum of BAS extracted from plants, achieving their division into groups, and further achieving isolation in an individual form. Тhe aerial part of Linaria vulgaris Mill. (common toadflax) contains both lipophilic and hydrophilic substances. The herb L. vulgaris is widely used in folk medicine for treatment of angina, conjunctivitis, dermatomycosis, periodontitis and other diseases. Bacterial factors play an important role in the pathogenesis of these diseases.Aim. To study the effect of solvents of different polarity on the component composition of extracted BAS and to study the antimicrobial activity of fractions from the herb L. vulgaris.Materials and methods. The aerial part of L. vulgaris was collected at the flowering stage – at the beginning of fruiting stage in July 2021 in the Perm region. The fractions were obtained by sequential exhaustive liquid-liquid extraction of an alcoholic extract from the herb L. vulgaris with hexane, dichloromethane, and n-butanol. Detection of BAS was carried out by HPLC and planar chromatography on paper. Antimicrobial activity was studied against Escherichia coli, Staphylococcus aureus and Candida albicans.Results and discussion. Using solvents of different polarity four fractions were obtained from the alcohol extract of L. vulgaris: hexane, dichloromethane, n-butanol and water. These fractions have differences in the composition of BAS. The number of polyphenolic substances in the fractions increases with increasing of solvent polarity: hexane (14), dichloromethane (55), butanol (61). The dichloromethane and n-butanol fractions have a similar composition, represented by polyphenolic compounds and iridoids. The main groups of compounds in these fractions are phenolic acids and flavonoids. Iridoids are found in trace amounts. In the hexane fraction, the smallest number of substances was found, iridoids are completely absent, and phenolic acids were found in trace amounts. The water fraction is characterized by the content of the entire BAS complex. The highest antibacterial activity against Escherichia coli and Staphylococcus aureus was found for the aqueous fraction, while the highest antifungal activity was found for the hexane and dichloromethane fractions.Conclusion. Using solvents of different polarity, fractions containing a diverse set of BAS were obtained from the alcoholic extract of L. vulgaris. Fractions exhibiting different polarities from L. vulgaris have antimicrobial activity against Staphylococcus aureus and Escherichia coli, as well as against pathogenic fungi from the genus Candida.

Currently, the search for effective ways to dispose of pharmaceutical waste, including the use of microorganisms, is relevant, which makes it possible to obtain products with new useful, in particular, phytostimulating properties. Our previous studies have shown that the product of bacterial destruction of paracetamol exhibits pronounced phytostimulating properties in relation to medicinal plants of the Lamiaceae, Plantaginaceae, Urticaceae, Asteraceae families and can be used as an inducer of accumulation of biologically active substances in them. The purpose of this work is to investigate the effect of the biodegradation product of paracetamol on the amount of polysaccharides, biomass, size and morphological and anatomical features of flax seeds Linum usitatissimum L. (Linaceae family). Materials and methods. The work used a product of biodegradation of paracetamol (PBP), obtained on the basis of the laboratory of alkanotrophic microorganisms "Institute of Ecology and Genetics of Microorganisms UrO RAS (Perm) from the pharmaceutical substance paracetamol with an expired expiration date. The study of the phytostimulating effect of PBP in relation to common flax was carried out on the basis of the A.G. Genkel Botanical Garden of the Perm State National Research University. The content of polysaccharides was determined by gravimetric method. A comparative analysis of the morphological and anatomical structure of seeds was carried out using the Motic DM-111 digital microscope and the Motic Play and Motic Educator software. Results. When processing flax seedlings of ordinary PBP, the amount of polysaccharides in seeds increased by 6%, the total collection of seed biomass by 20.5%, the size (length) of seeds by 2% compared to the control (water). Biometric parameters of the mucous layer of seeds collected from the site treated with PBP increased by 10% compared to the control. Conclusion. The biodegradation product of paracetamol has a stimulating effect on the medicinal plant of the flax family (Linaceae) flax Linum usitatissimum L., increasing the content of polysaccharides, the total collection of seed biomass and their size.