Variability Of Hypericin And Hyperforin Content In St. John'S Wort From Individual Localities Of Czech Republic

Hypericum perforatum L. from 19 localities of Czech Republic was studied for the variability of hypericin and hyperforin content in the period 2006 - 2008. Plant samples which were transferred as a seeds into the field nursery in Olomouc were evaluated separately. According our measurement Hypericum perforatum in the Czech Republic contain 0.3 - 3.8 mg. g- 1 of hypericin (1.3 mg. g(-1) in average) and 4.0 - 248.2 mg. g(-1) of hyperforin (97.6 mg. g(-1) in average). The results showed statistically significant differences in hypericin and hyperforin content between studied years but only content of hyperforin was found statistically different in the plants from different natural localities.