CHEMICAL COMPOSITION OF PEROVSKIA ANGUSTIFOLIA ROOTS COMPONENTS AND THEIR ANTIMICROBIAL ACTIVITY
UDC 615.322:547.913+543.544.45
Abstract
The component composition of the essential oil (EO) obtained by hydrodistillation and hexane extract of the roots of the plant Perovskia angustifolia Kudr., growing in the territory of the Namangan region (Kamchik pass) of the Republic of Uzbekistan, was studied. In total, 52 compounds were characterized in the composition of the essential oil, which is 88.6% of the total amount of oil, and in the hexane extract there were 15 substances, which are 74.0% of the total amount of the extract. Sesquiterpenes and oxidized sesquiterpenes predominate in the composition of the EO. The major components of the EO are aromadendren, ledol, spathulenol, (E)-β-farnesene, tau-cadinol. The dominant components in the hexane extract were oxidized diterpenes, sesquiterpenes and compounds of other classes, and the major components were ferruginol, di(ethylhexyl) phthalate, aromadendren and salvicanol.
Three individual phenolic compounds were isolated from various fractions of the 80% alcoholic extract of P. angustifolia roots, which were identified with cryptotanshinone, caffeic and rosmarinic acids based on the study of 1H, 13C NMR, HSQC and HMBC spectra.
The antibacterial and antifungal effects of the root extracts, cryptotanshinone, rosmarinic and caffeic acids were studied using the disk diffusion method in agar. The results of in vitro tests showed that Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa are sensitive to the action of all the studied samples to varying degrees. The greatest antibacterial effect is observed in chloroform and 80% ethanol extract of roots and rosmarinic acid with an inhibition zone diameter of 18.08±0.12 mm in relation to the gram-positive bacterium S. aureus. All the studied samples were inactive against Escherichia coli and Candida albicans.
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