Fuente: WIPO "tomato" The invention relates to aromatic carboxylic acid ionic derivatives, wherein anion is represented by a general formula (I) or (II), and cation is selected from cation M+ and a cation of general formula (III), wherein the formulae (I), (II) and (III) are defined in the description, for use as a plant stimulant in plant growth regulation and/or in regulation of plant metabolic processes, and also—in case of ionic derivatives, wherein the anion is defined by the general formula (II)—for preventing the effects of biotic stress caused by the activity of viruses, bacteria and/or fungi. The invention also relates to a plant stimulation method and use of aromatic carboxylic acid ionic derivatives as active compounds for the production of compositions for stimulating plants by regulating their growth and/or metabolic processes, and in case of derivatives, wherein the anion is defined by the general formula (II)—also for preventing the effects of biotic stress caused by the activity of viruses, bacteria and/or fungi.