Effects of Plant Growth Regulators on Plum (Prunus domestica L.) Grown on Two Rootstocks at Harvest and at the Postharvest Period

Plant growth regulators (PGRs), such as cytokinins (6-benzyladenine; BA) and gibberellins (GAs), are widely used in fruit production. This study focused on the plum cultivar “Čačanska rodna” (P. domestica L.) grafted vegetative rootstock “WaVit” generative Prunus cerasifera, with interstock spinosa. PGR treatments included 50 mg L−1 100 of BA 200 gibberellin A3 (GA3) non-treated control. Pomological characteristics fruits were examined at harvest, while physicochemical properties analyzed harvest after 28 days cold storage 4 shelf life. GA3 application changed morphological traits, improved skin strength, increased carotenoid, anthocyanin sucrose content decreasing titratable acidity harvest. The beneficial effects higher sucrose, carotenoid levels persisted all PGR-treated GA3-treated had firmer flesh, stronger total soluble solids (TSS) content, BA-treated plums, these rootstock-dependent. physical chemical composition postharvest period suggest applied treatments. Moreover, might have prolonged impact storability, nutritional profile sensory properties. Based our results, preharvest treatment can be standard cultivation practices within contemporary production systems European plums not only to improve quality but also potential value, regardless used.