Hypericum perfuratum L. (St. John's wort) is one of medicinal plants belonging to Hypericaceae family
[1], a perennial flowering plant, has nearly a 200-year history of use in traditional
folk medicine for the treatment of various ailments [2]. The Pot experiments were
carried out at the Researches Centre of Medicinal Plants & Ethno-veterinary, Shahrekord,
Iran in 2011, to investigate the effect of the foliar application of jasmonic acid
at the rates of 0.0 as a control, aceton as a solvent, 50, 100, 200 and 400µL on hypercin
content of H. perfuratum L. The hypercin of the tetra-hydrofuran extract obtained from the areal parts of
H. perfuratum by British pharmacopea. The result of analysis of variance of the experiment showed
that different levels of the foliar application of jasmonic acid do have significant
impacts on hypercin content. The, mean comparison by Duncan test showed that highest
amount of hypercin was 200µL (0.8% hypericin/extract), and lowest amount of hypercin
was aceton (0.8% hypericin/extract).