SEASONAL DYNAMICS OF POLYSACCHARID CONTENT IN RAW MATERIALS REYNOUTRIA JAPОNICA
Abstract
The dynamics of the accumulation of water-soluble polysaccharides in various organs of Reynoutria japonica Hout (Polygonaceae), harvested in the Ussuriisk region of the Primorye Territory in different phases of vegetation, has been studied. As a result of the studies, four polysaccharide fractions were isolated from the raw materials of R. japonica organs: water-soluble polysaccharides, pectin substances, hemicellulose A and B, which are fixed in all organs of the plant during the observation period.
The chemical composition of R. japonica has been studied insufficiently and unilaterally. The secondary metabolites of the phenolic complex have been studied mainly, whereas there is practically no information on the carbohydrate composition, although this group of compounds plays an important role in the plant ecophysiology and shows a pronounced physiological activity. The conducted studies have established that the maximum content of biologically active polysaccharides (water-soluble polysaccharides and pectin substances) in the leaves is noted in the phase of the beginning of vegetation, in the buds of budding and flowering phases, in the roots in the phase of drying. The content of hemicellulose A and B is characterized by stability and changes insignificantly during the season.
The obtained results allow to establish scientifically justified terms of raw material preparation for effective practical use.
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