Abstract
Plants of the Bistorta genus manifest themselves as a rich source of phenolic compounds, exhibiting antioxidant, anti-inflammatory, antitumor effects, etc. One of the important research tasks in this connection involves the identification of the plant organ having the maximum concentration of the target substances, as well as the comparison of the content of secondary metabolites in plants of different species of the genus. The aim of this work was to study the content of phenolic compounds in the organs of individual plants of three species of the Bistorta genus growing in Siberia: B. officinalis, B. vivipara and B. attenuata. The total content of phenolic compounds in water-ethanol plant extracts was determined by spectrophotometric methods. The results of the study revealed a high level of variability of flavonols and catechins in the organs of the studied species. The average variability of tannins is noted in the inflorescences of B. attenuata and B. vivipara, as well as in the leaves and rhizomes of B. officinalis. A decrease to low variability is observed in the leaves of B. vivipara. An uneven distribution of phenolic compounds in the organs of different plant species was established. B. attenuata plants accumulate the largest number of flavonols in inflorescences, while B. officinalis and B. vivipara demonstrate the maximum value in the leaves. B. officinalis contains more catechins in rhizomes, while B. attenuata and B. vivipara demonstrate the highest catechin value in inflorescences. B. officinalis presents a unique plant species with an extremely high content of catechins (10.5%) and tannins (29.8%) in the underground organs. B. attenuata differs from the other two species in having a lower catechin content in all organs, but the highest number of flavonols in inflorescences (10.7%). The unique character of accumulation of substances in plant organs characterising each species should be taken into account when collecting raw materials for medicinal use.
Highlights
Species of the Bistorta genus growing in Siberia: B. officinalis, B. vivipara and B. attenuata
The total content of phenolic compounds in water-ethanol plant extracts was determined by spectrophotometric methods
The results of the study revealed a high level of variability of flavonols and catechins in the organs of the studied species
Summary
В группе индивидуальных растений B. officinalis выявлены особи, имеющие намного большее количество флавонолов по сравнению с Xср: в листьях – на 49%, в соцветиях – на 53%; у B. vivipara – на 44 и на 40%; у B. Количество катехинов варьирует на очень высоком уровне в корневищах индивидуальных растений B. vivipara (54,6%), B. attenuata Высокий уровень изменчивости содержания флавонолов обнаружен в листьях и соцветиях всех видов, кроме B. attenuata из пос. ЗАКЛЮЧЕНИЕ Отмечен высокий потенциал растений изученных видов в плане накопления флавонолов, катехинов и танинов, выявлена способность некоторых индивидуальных растений к повышенному содержанию биологически активных веществ. B. officinalis является уникальным видом растений с чрезвычайно высоким количеством катехинов (10,5%) и танинов (29,8%) в подземных органах, а растения B. attenuata отличается наибольшим содержанием флавонолов в соцветиях (10,7%). В целом для растений изученных видов отмечен высокий уровень индивидуальной изменчивости содержания фенольных соединений
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