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The aim of the study was to assess the impact of auxin (IAA), gibberellin (GA3) and cytokinin (kinetin), used solely and in combination with methyl jasmonate (MJ), on the accumulation of anthocyanins and biogenic amines in hypocotyls and cotyledons of common buckwheat (Fagopyrum esculentum Moench) seedlings. The obtained results indicate that accumulation of anthocyanins in buckwheat seedlings was dependent on the concentration of the phytohormone applied and the tissue studied. The combined use of MJ and IAA, GA3  or kinetin partly reversed the effect of strong inhibition of anthocyanin synthesis by MJ. IAA used solely decreased the level of anthocyanins in de-etiolated buckwheat cotyledons. IAA also caused a reduction of putrescine content, both in hypocotyls and cotyledons of buckwheat seedlings. MJ used alone caused high accumulation of 2-phenylethylamine (PEA) in buckwheat cotyledons and hypocotyls. The simultaneous application of MJ and IAA, GA3  or kinetin also stimulated PEA synthesis in buckwheat tissues, however this effect was significantly lower compared to the use of MJ only. A reverse significant correlation between PEA and anthocyanin contents occurred in buckwheat hypocotyls, but not in cotyledons. It was suggested that the deficiency of L-phenylalanine, a substrate for synthesis of 2-phenylethylamine, may be partly responsible for the decline in anthocyanin content in buckwheat hypocotyls under the influence of MJ

acta agrobotanica

Effects of simultaneous use of methyl jasmonate with other plant hormones on the level of anthocyanins and biogenic amines in seedlings of common buckwheat (Fagopyrum esculentum Moench)