EN
Jasmonic acid (JA) and methyl jasmonate (JA-Me) are naturally occurring growth regulators widely distributed in plants, showing various biological activities in the regulation of plant growth and development. This article reviews the effect of methyl jasmonate and/or jasmonic acid on ethylene production and some other physiological processes during ripening of tomatoes and apples, flowers senescence and ethylene production in leaves and the possible role of jasmonic acid in biosynthesis of ethylene in wounded and pathogen infected tissues. It was found that JA-Me and JA induce or stimulate ethylene production in different organs of many plants. It seems that methyl jasmonate and jasmonic acid are among the factors controlling the biosynthesis of ethylene through stimulation of ACC synthase and ACC oxidase activities.