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Przybyl J.L.,Warsaw University of Life Sciences | Paczesna E.,Warsaw University of Life Sciences | Angielczyk M.,Warsaw University of Life Sciences | Baczek K.,Warsaw University of Life Sciences | And 3 more authors.
Acta Horticulturae | Year: 2011

Southern sweet-grass is a tuft-grass naturally occurring in Poland. The leaves of this plant are coumarin raw material used in medicine as well as in food and tobacco industry. The content of coumarin in the leaves is the most important quality discriminant of the raw material. This species being under partial legal protection is seriously endangered because of excessive, uncontrolled collecting. Taking into consideration this danger the trials of its cultivation were undertaken in our Department. The aim of the study was to investigate the intraspecific variability of southern sweet-grass wild growing in the eastern area of Poland. The differences concerning the coumarin and related compounds between six geographically distant populations and between 42 individuals (belonging to one population) were investigated. Both the populations and the individuals distinctly differed in the content of all detected coumarin compounds: coumarin, 3,4-dihydrocoumarin and o-coumaric acid. The highest differences between individuals were found in the content of coumarin (from 87.07 to 1082.43 mg×100 g-1 of dried raw material). There were also visible differences between individuals in the intensity of powdery bloom on the leaves. The plants with leaves coated with thick white bloom were characterized by significantly higher content of coumarin in comparison with plants without visible bloom. It may indicate that this compound is partly secreted from the leaves and accumulated in the powdery bloom. Source


Baczek K.,Warsaw University of Life Sciences | Przybyl J.L.,Warsaw University of Life Sciences | Angielczyk M.,Warsaw University of Life Sciences | Kuczerenko A.,Warsaw University of Life Sciences | And 3 more authors.
Acta Horticulturae | Year: 2011

Dropwort (Filipendula vulgaris Moench) is an Euro-Asiatic perennial belonging to the family Rosaceae. The raw materials (above-and underground organs) of this plant, rich in phenolic compounds, reveal anti-inflammatory, anti-rheumatic and diuretic activity. The effect of the summer flowering shoots removal on the yield of basal leaves and underground organs (rhizomes with tuberous roots) and accumulation of phenolic compounds (determined by HPLC) in two-year-old plants was investigated. The shoots removal increased the yield of these organs. The dominant phenolic compounds in the leaves were hyperoside, (-)-epicatechin and gallic acid, whereas in underground organs - catechin derivatives [(+)-catechin, (-)-epicatechin]. The shoots removal significantly increased the content of gallic and chlorogenic acids in the leaves, whereas in rhizomes and tubers decreased the content of all determined compounds. Source

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