Folia Horticulturae

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Evaluation of St. John's wort (Hypericum perforatum L.) collection

Katarzyna Seidler-Łożykowska, Kazimierz Kaźmierczak

Breeding and Agricultural Laboratory
The Research Institute of Medicinal Plants
Libelta 27, 61-707 Poznań, Poland

St. John’s wort is a perennial medicinal plant commonly cultivated in Poland. St. John’s wort herb, collected at the beginning of its flowering, has a broad spectrum of medical applications. In recent years St. John’s wort plantations have been infected by fungi Colletotrichum gleosporioides (Penz.), which has caused necrosis of whole plants. In the Research Institute of Medicinal Plants (RIMP) a collection of 10 accessions was gathered to evaluate their morphological traits, secondary metabolites content and resistance to pathogen in comparison with cultivar ‘Topaz’. The two-year evaluation of the collection made it possible to select accession nr 7, coming from Czarny Las near Ostrzeszów, whose plants showed Cgleosporioides tolerance and a high content of secondary metabolites.

Seidler-Łożykowska K., Kaźmierczak K., 2005. Evaluation of St. John's wort (Hypericum perforatum L.) collection. Folia Horticulturae 17/1: 101-108.