INVESTIGATION OF SALICYLIC ACID-INDUCED CHANGE ON FLAVONOIDS PRODUCTION UNDER CADMIUM TOXICITY IN BUCKWHEAT (FAGOPYRUM ESCULENTUM MOENCH) PLANTS

Salicylic acid (SA) is an imperative endogenous plant hormone. It is considered as one of the most important signaling molecule, involved in both abiotic and biotic stress tolerance. Application of optimal concentrations (0,05 mM) of SA enhances plants tolerance to cadmium stress by modulating levels of several metabolites, including components of antioxidative defense, osmolytes, secondary metabolites, and metal-chelating compounds. We showed that when SA and Cd were applied simultaneously, the damage was less pronounced than without SA. SA treatment itself also caused the oxidative stress, but decreased flavonoids content, regulated phenolic synthesis and lignin formation. Thus, the main purpose was to investigate how SA treatment, used prior the Cd stress, prevented the damaging heavy metal effects in buckwheat plants. And show that regulation of flavonoids and lignin formation are an important indicator of stability and stress resistance. The obtained data will expand the knowledge about the role of phenolic compounds and the action of salicylate under the cadmium chloride conditions. Also data with this type of buckwheat – Fagopyrum esculentum Moench, Rubra variety under the action of cadmium chloride and salicylic acid not found