Journal of the American Society for Horticultural Science · 1980 · 17 citations · 0 references
Life SciencesPlant BiologyPlant SciencesPlant EcophysiologyPlant Hormone BiologyPlant PhysiologyAbscisic Acid BiologyAuxin BiologyBud DormancyFruit PhysiologyPlant Hormone PhysiologyPlant Hormone SignalingAbscisic Acid Regulation Of Bud DormancyBud Break PhysiologyBud Break ProtectionBud Break ResponseBud Damage AssessmentDormant StagesInjection PressureInjection Pressure Effects
Abstract A pressure injection method was used with abscisic acid (ABA) and 6-benzylamino purine (BA) to control bud break of one-year-old trees of ‘Yellow Delicious’ apple ( Malus domestica Borkh). When dormant trees were injected with 3 ml of 250 ppm (wt/vol) ABA, 58% of buds were inhibited after 28 days compared to 31% of the buds of the controls; injections of 3 ml of 200 ppm (wt/vol) BA above the ABA-injection site, induced 52% of the inhibited buds to open. Radioassays of apple stems collected 11 and 9 days after injection, respectively, with 14 C-ABA or 14 C-BA indicated highly significant increases in radioactivity in the phloem, buds and new shoots compared to radioassays taken immediately after injection.