Abstract
Medicines from plants are widely used in the complex treatment of different diseases every day. Therefore, theoretical and practical interest is the in-depth study of the herb of perspective plants like Centaurium erythraea Rafn. and Gentiana cruciata L. These plants have a long history of usage and interest of people. The aim of the study was to determine the content of amino acids in these plants. The amino acids composition and content in the herb of study species of the family Gentianaceae determined by the HPLC method. The results of the research revealed that the raw material of Centaurium erythraea Rafn. and Gentiana cruciata L. contains free and bound amino acids. Sixteen free and seventeen bound amino acids were identified in the herb of Centaurium erythraea Rafn. The herb of Gentiana cruciata L. contained thirteen free and fifteen bound amino acids. L-glutamic acid, L-arginine, L-aspartic acid, and L-cystine were predominant of Centaurium erythraea Rafn. herb. Amino acids L-lysine, L-serine, L-aspartic acid, and L-phenylalanine were present in the herb of Gentiana cruciata L. in the greatest amount. The metabolic processes in which these amino acids are involved connected to the medicinal properties of the study plants according to their use in official or nontraditional medicine.
Highlights
The use of medicinal plants with therapeutic properties is as old as human civilization
Free L‐glutamic acid, L‐arginine and L‐aspartic acid were present in the herb of Centaurium erythraea Rafn. in the greatest amount, their content was 1.56 μg/mg (1.29% from total content amino acids), 1.16 μg/mg (0.96%) and 0.92 μg/mg (0.76%), respectively
The results revealed that the raw material of the study species plants contains significant amounts of free and bound amino acids
Summary
The use of medicinal plants with therapeutic properties is as old as human civilization. The main effect of using the medicinal plant is the regulation of metabolic disorders, as plant metabolites are close to the metabolites of the human body (Darzuli et al 2019; Slobodianiuk et al 2021a). Species belonging to the Gentianaceae family are important because of their pharmacological use, namely the formation of very rich and specific secondary metabolites (Rybczyński and Wójcik 2019). The Gentianaceae family includes the following genera: Centaurium Hill., Gentiana L., Swertia L., Menyanthes L., etc (Budniak et al 2021a). Plants belonging to these genera are a source of important pharmacologically active phytochemicals that have antimicrobial, antipyretic, anti-inflammatory, cyto-
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