phytochemical response of hyssop (hyssopus officinalis l.) to foliar application of jasmonic acid

background & aim:jasmonic acid (ja) is regarded as endogenous regulators that play important roles in regulating stress responses, plant growth and development.effect of foliar application of ja on the essential oil and oil chemical components of hyssop (hyssopus officinalis l.) were investigated. experimental:  this study conducted in a crd with three replications and in experimental greenhouse, i.a.u., shahrekord branch, iran at 2012. experimental treatments included (i) water foliar application (control), (ii) water + aceton foliar application (as a solvent), (iii-v) 50, 100 and 200 ja µl. the essential oils obtained by hydro-distillation were analyzed by gas chromatography-mass spectrometry. results & discussion: the results of gc-ms showed that the major components of the oil were cis-3-pinanone (10-39%), trans-3-pinanone (4-28%) and β-pinene (27-34%). the results of analysis of variance of the experiment showed that different levels of the foliar application of ja do have significant impacts on chemical constitutes in the essential oil.finally, foliar application of 200 µl ja on some of secondary metabolite production in h. officinalis oil could be partially changed. recommended applications/industries: abbreviation: ja: jasmonic acid, mj: methyl jasmonate, gc-ms: gas chromatography-mass spectrometry µl: micro liter, m: molar; anova: analysis of variance, crd: completely randomized design.