Flavonoids of Bistorta vivipara (L.) Delarbre in relation to their ecological role.

摘要

The results of research into the flavonoid content and structure of Bistorta vivipara (L.) Delarbre from their natural habitats in Siberia are discussed. The plants grow under conditions of enhanced insolation at a height of 1500 m above sea level and higher; they accumulate a significant amount of flavonoids; and even superfluous humidity, low air, and soil temperature in a high-mountain tundra zone does not counteract their biosynthesis. In plants located in shaded areas, there is lower flavonoid content. It is quite probable that these pigments play the role of filters, protecting the tissues of the plants from the unwholesome influence of ultraviolet rays, and the height of their locality above sea level is one of the leading ecological factors. The adaptation of plants to UV radiation occurs at the expense of shielding compounds of the epidermal cells. Flavonol aglycones were investigated for the first time by the high performance liquid chromatography (HPLC) method in plants collected from the territory of Altai. Three aglycons have been discovered: myricetin, quercetin, and kaempferol. The main aglycone of B. vivipara is quercetin (up to 5.8% in flowers and 6.8% in leaves).Notes Translated from Sibirskii Ekologicheskii Zhurnal (2013), No. 4, 565-574 (Ru).