Abstract
B. longifolium ssp. aureum cenopopulations were detected in forest phytocenoses of the coniferous-broad-leaved forests and the forest-steppe zones of the Republic of Tatarstan. In each habitat, the concentration of phenolic compounds, flavonoids, proanthocyanidins, and photosynthetic pigments was determined in 20 collected plants of the middle age ontogenetic state. Chromatographic analysis of phenolic compounds of the raw materials of each cenopopulation was carried out.
 It was found that the content of rutin and ferulic acid of plants in the zone of coniferous-broadleaf forests was higher than in the forest-steppe zone. However, there was a more diverse spectrum of phenolic compounds. The chlorogenic and benzoic acids, quercetin and kaempferol were detected. In all communities, high intra-population variation in the concentration of biologically active substances was revealed. This fact should be taken into account during plantation creations and raw materials collection.
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