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Contemporary Problems of Ecology

2013 year, number 4

On Flavonoids of Bistoria vivipara (L.) Delarbre in Relation to their Ecological Role

G. I. VYSOCHINA, M. S. VORONKOVA
Central Siberian Botanical Garden SB RAS, 630090, Novosibirsk, Zolotodolinskaya str., 101
vysochina_galina@mail.ru
Keywords: Bistorta vivipara (L.) Delarbre, insolation, flavonoids, flavonols, myricetin, quercetin, kaempferol, Siberia

Abstract

Results of the studies of the flavonoid content and structure of Bistorta vivipara (L.) Delarbre from the natural habitats of Siberia are discussed. The plants growing under the conditions of enhanced insolation at the altitude of 1500 m above the sea level and higher accumulate a significant amount of flavonoids, even the conditions of superfluous humidity, low temperature of air and soil in a high-mountain tundra zone do not counteract their biosynthesis. The flavonoid content in the plants of shaded habitats is lower. It is quite probable that these pigments play a role of filters protecting plant tissues from the unwholesome influence of ultraviolet radiation, and the altitude of locality above the sea level is one of the leading ecological factors. Adaptation of plants to the UV radiation occurs due to the shielding compounds of the epidermal cells. Flavonol aglycones in the plants collected at the territory of the Altay were studied for the first time by means of HPLC. Three aglycons have been detected: myricetin, quercetin and kaempferol. The major aglycone of B. vivipara is quercetin (to 5,8 % in flowers, 6,8 % in leaves).