Determination Of The Content Of Biologically Active Substances In Some Aquatic Higher Plants

The article identifies the following biologically active substances in the surface and the underground parts of Eichhornia crassipes, Pistia Stratiotes, and Lemna minor aquatic plants (roots, stems, leaves): alkaloids, anthraquinones, proteins, tannins, flavonoids, phenolic compounds, polysaccharides, anthraquinones, and coumarins. A brief overview of scientific works has been given for certain types of biologically active substances and their biological activity, importance, biosynthesis, and genetic transfer. The results of this research show that high amount of biologically active substances (BAS) was found in Eichhornia crassipes aquatic plant in terms of tannins, which in the roots amounted to 7.476%, and in the above-ground part - to 6.73%. The content of polysaccharides was 5.907%, and in the roots - 2.642%. By the amount of BAS detected in the composition of Pistia stratiotes aquatic plant, polysaccharides content in the aerial part was 3.073%, and in the roots - 4.881%, the content of flavonoids in the aerial part was 4.833%, and in the roots - 3.716%. Among BAS in Lemna minor water plant, the content of flavonoids was 5.463%.