The content of alkaloids in Polygonatum odoratum depending on the phase of vegetation (Buryatia)

УДК 582.572.232:581.192+633.88(571.54)

Abstract

The article presents the results of studying Polygonatum odoratum (Mill.) Druce for the presence of alkaloids and changes in their content in aboveground and underground organs depending on the phase of vegetation in Buryatia. During the entire growing season, there is a constant change in the accumulation of alkaloids in the plant from 0.02 to 0.23 %. The largest number of them in the underground part is observed at the beginning of the growing season (0.23 %), in stems and leaves during budding (0.12 %), in generative organs during fruiting and seeding (0.20 %). The lowest content of alkaloids can be seen in the root system during seeding (0.11 %), in stems and generative organs during flowering (0.06 %), in leaves during fruiting (0.02 %). In the underground organs of the fragrant plant at the beginning of the growing season, in spring, the content of alkaloids is high, after which it decreases during budding and flowering and increases again from the moment of fruit formation at the end of June. In the aboveground organs of Polygonatum odoratum (stems, leaves, buds), the budding phase (early June) accounts for the highest content of alkaloids. The minimum is reached during the flowering phase. From the moment of fruit formation, there is a second peak of maximum in stems and leaves. With the end of the vegetative season, the quantitative content of alkaloids in stems and leaves decreases. In generative organs, from the beginning of fruit formation to seeding, an increase in the accumulation of alkaloids to its maximum value is visible. Thus, the amount of alkaloids in the aboveground and underground organs of Polygonatum odoratum varies depending on the phase of vegetation. The dynamic processes of alkaloid accumulation in the root system and in aboveground organs are close throughout the growing season: two maxima and two minima. There is one minimum in the generative organs, which occurs during the flowering phase. The high content of alkaloids is noted in buds and fruits.