HortScience · 1972 · 52 citations · 4 references
Life SciencesPlant BiologyPlant SciencesCrop PhysiologyPlant Hormone BiologyPlant PhysiologyFloral TraitsFlowering PhysiologyGibberellin BiologyHormonal Control Of FloweringSeasonal Flower ProductionFlower InitiationFlowering RegulationGibberellic Acid TreatmentGibberellin ApplicationGibberellin EffectsGibberellin Regulation Of FloweringGibberellin ResponsesHormonal Regulation Of Flowering
Abstract Gibberellic acid (GA 3 ) was applied at 75 ppm to mature ‘Redskin‘ peach trees at various times during the summer and fall. Flowering was reduced by GA 3 , the degree of reduction depending on time of application. Two response peaks were evident: the first occurred with application in early summer, at the time of flower initiation; the second occurred in late summer and resulted from mortality of developing flower buds. Application of GA 3 shortly before leaf fall caused the most retardation of flower development the following spring. The nature and degree of flowering response was, therefore, related to time of GA 3 application.
4