Materials and methods
Plant matetials
The seeds of the plants tested were obtained through Index Seminum from botanical gardens and universities (Jardin Botanique de la Villa et de I'Universite, France; Nasu Botanical Garden, Japan; The Nippon Shinyaku Institute for Botanical Research, Japan). They were grown in the experimental field of the Institite of Tropical and Subtropical Agriculture of the Czech University of Agriculture in Peague(ITSA CUA in Prague.)