Folia Horticulturae

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Selected secondary metabolites in leaves, inflorescences, and rhizomes of Silphium perfoliatum L. - alternative herbal plant

Radosław Kowalski

Central Apparatus Laboratory and Sub-Department of Instrumental Foodstuff Analysis
University of Agriculture in Lublin
Akademicka 13, 20-950 Lublin, Poland
e-mail: radko@ursus.ar.lublin.pl

Evaluation of secondary metabolite content (essential oil, flavonoids, o-dihydroxyphenols of caffeic acid type and tannins) was made in leaves, inflorescences, and rhizomes of the alternative herbal plant Silphium perfoliatum L. during ontogenesis. It was found that the plant rhizomes contained the highest level of essential oil (up to 0.43% v/w) and are therefore most interesting raw material. Leaves contained the highest level of phenolic compounds: o-dihydroxyphenols of caffeic acid type (up to 1.36%), tannins (up to 9.65%), and flavonoids (up to 1.10%). The period just before flowering was the optimum date of harvest.

Kowalski R., 2003. Selected secondary metabolites in leaves, inflorescences, and rhizomes of Silphium perfoliatum L. - alternative herbal plant. Folia Horticulturae 15/2: 203-209.