Participation of jasmonic acid in the long-distance signalling from roots to shoots of peas plants under saliny

Jasmonic acid (JA) and its derivatives are involved in the adaptation of plants to biotic and abiotic stresses, including salinization. However, there is insufficient information about the role of JA in the transmission of signals from organ to organ under the local action of abiotic factors. The signaling role of JA in connection with the reaction of shoots to salinization of the root environment of pea plants has been studied. The results of the effect of salinization on changes in the content of JA in the growing and conducting zones of roots and xylem sap, as well as the localization of JA and abscisic acid (AA) in the leaves of stressed plants due to changes in their transpiration level are presented. The content and localization of JA in leaves and roots of plants were evaluated by immunohistochemical method using specific antibodies. The purpose of this study is to check whether salinity-induced changes in the concentration of JA in roots and xylem sap can explain the accumulation of these hormones in leaves and related transpiration changes.