Abstract
The use of chemotaxonomic methods for studying plants allows you to help identify the ancestral and species affiliation of closely related plants. Chemotaxonomy is especially useful for systematically young groups of plant taxa, characterized by great variability in morphological features, difficulty in identifying and clarifying systematic affiliation. The article analyses the content of various groups of biologically active compounds in plants of the genus Centaurea L. to find the most convenient chemotaxonomic markers. As a result of the analysis of the variability of flavonoids, sesquiterpene lactones, polysaccharides and other biologically active substances of the genus Centaurea, it was found that «flavonoid profiles» are most species-specific, and sesquiterpene lactones can serve as an additional taxonomic feature at the level of subgenera and sections of this genus. More detailed studies are needed to map the distribution of biologically active compounds as chemotaxonomic markers.
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