Abstract

Abstract: For the first time, medicinal plants of arid landscapes of the south of Russia were studied for amino acid composition, vitamins. The features of the accumulation of organic acids and vitamins in medicinal plants were established, the concentrations were correlated from the type and genus of the plant. The component composition of amino acids of the studied LR samples was studied. A total of 9 amino acids were found, of which 5 are irreplaceable. The content of aminoacidum in the studied samples have high levels of variation within the species list, regardless of the plant family, and have a range of total amino acid composition ranging from 3.28% to 12.42%. In general, the content of AC prevails in plants of the species Plantágo májor (12.42%), Polygonum aviculare (9.47%), Capsella bursa-pastoris (8.06%). The lowest indicators of the total number of AC were found for plants of the species Artemisia austriaca (3.28%), Cardaria draba (3.71%). The content of oxalic acid is noted in the aster family and astragalus of the esparcet family of legumes < 250 mg/kg, in other plant samples the content of oxalic acid is > 200 mg/kg. This may be due to the fact that many plants of arid territories accumulate nutrients in the form of salts of organic acids. Studies have shown that the vitamin C content in almost all plant samples is higher than the vitamin K content, with the exception of the common shepherd's purse and the bird's bittern, this may be due to specific features and growing conditions. The percentage of sugar in plant samples has a high level of variation from 1.05 to 5.32%, this may also be due to the specific species of plants, regardless of the family affiliation. A direct correlation has been established between the contents of biologically active organic acids and nutrients in vegetation. The study showed that organic acids have a strong variation in indicators and depend on the type of selected plants and the properties of the functional zone of growth.

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