STUDY OF TANNINS IN CONES AND NEEDLES OF SCOTS PINE (PINUS SYLVESTRIS)

Abstract

Scots pine is a source of valuable biologically active substances, however, only pine buds are used in official medicine; other parts of the plant are not fully understood.The purpose of this work is to study the seasonal dynamics of accumulation of tannins of cones and tree greens (needles) Common pine trees that grow in the Perm region.Materials and methods: the objects of research were cones and needles of common pine, harvested in the Krasnokamsky districtof the Perm region in the period from 2018-2019. The presence of tannins in raw materials was confirmed by qualitative reactions.Results: The analysis of tannins contained in cones and needles of Scots pine was carried out. Using qualitative reactions it was found that the tannins present in the plant raw are condensed compounds. The content of tannins was determined by the titrimetric method, and their seasonal dynamics of accumulation was established. In terms of the quantitative content of these polyphenols, these two types of raw materials are unequal.Conclusion: Most of these compounds accumulate in cones in the spring, in contrast to needles, where the level of tannins is lower and almost stable throughout the year.