FEATURES OF THE FLAVONOID ACCUMULATION IN THE ORGANS OF THE ABOVEGROUND PART OF RHEUM COMPACTUM L.
Abstract
Features of the flavonoids accumulation in the organs of aboveground parts of the plants Rheum compactum L. was investigated by High-Performance Liquid Chromatography method. The flavonols quercetin, kaempferol, rhamnetin, rutin, astragalin and flavone luteolin identified in the ethanol extract of the reproductive organs, stems and leaves of R. compactum.It was revealed, that the flavonols quercetin, kaempferol rhamnetin, rutin, astragalin contain in all the organs. The extract from the fruit is different by the presence of flavone luteolin. Buds (13,06%), inflorescence (6,92%) and leaves in the phases of vegetation (5,28%) and budding (6,23 %) may be a source of rutine. Least of all rutin accumulates in the petioles (0,16–0,40%).The content of the other phenolic compounds identified in the extracts from the aboveground organs R. compactum less than 1%. The higher content of quercetin in the inflorescences (0,55%) and buds (0,22%), astragalin and kaempferol – in the buds (0,19 and 0,44%, respectively) and in the leaves in the phases of vegetation (0,14 and 0,26%), and rhamnetin – in the leaves in the phases of vegetation (0,24%) and buds (0,15%). The petioles contain less flavonoids than in the leaves and reproductive organs.
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