Folia Horticulturae

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Accumulation of biologically active compounds in the seeds of Rhaponticum carthamoides (Willd.) Iljin cultivated in Poland

Anna Geszprych, Zenon Węglarz

Department of Vegetable and Medicinal Plants
Warsaw Agricultural University
Nowoursynowska 166, 02-787 Warszawa, Poland
e-mail: ogr_krwl@alpha.sggw.waw.pl

The aim of the present study was to determine ecdysterone (20-hydroxyecdysone) and sterol content in the seeds of Rhaponticum carthamoides cultivated in Poland. The effect of plant age, seed ripeness, and location of seeds in a fructification on the concentration of the above-mentioned compounds in seeds was investigated. The seeds of 4-year-old plants were characterised by a significantly higher content of ecdysterone and sterols in comparison with the seed of 2- and 3-year-old plants. The concentration of ecdysterone and sterols in the ripe seeds was distinctly higher than in those collected at milk- and wax-ripe stages. The concentration of investigated compounds (especially ecdysterone) in the seeds was related to their location in a fructification and was significantly higher in the achenes from the external part of a capitulum.

Geszprych A., Węglarz Z., 2002. Accumulation of biologically active compound in the seeds of Rhaponticum carthamoides (Willd.) Iljin cultivated in Poland. Folia Horticulturae 14/1: 195-199.