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Promotion of flowering in apple trees with gibberellin A4 and C-3 epi-gibberellin A4 |
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| Authors: | Norman E Looney Richard P Pharis Masana Noma |
| Institution: | (1) Pomology and Viticulture Section, Agriculture Canada Research Station, V0H 1Z0 Summerland, B.C., Canada;(2) Plant Physiology Research Group, Biology Department, University of Calgary, T2N 1N4 Alta, Canada;(3) Present address: Central Research Institute, Japan Tobacco and Salt Public Corporation, 6-2 Umegaoka, Midori-Ku, 227 Yokohama, Kanagawa, Japan |
| Abstract: | The proportion of spurs flowering on apple trees (Malus domestica Borkh. cv Golden Delicious) displaying a high degree of alternate-year flowering was increased in the  off year by gibberellin A4 (GA4) and C-3 epi-GA4 applied in the previous year. When applied 4.5 weeks after anthesis amounts of GA4 ranging from 3 to 300  g per spur and 25 or 50 g of C-3 epi-GA4 per spur were effective. Treatments with GA4 made seven weeks after anthesis were less effective. A combination of 30 g GA4 and 30 g zeatin (6-(4-hydroxy-3-methylbut-trans-2-enylamino)purine) promoted flowering at both treatment times, and tended to be more effective than GA4 alone.Abbreviation GA
gibberellin or gibberellin-like substance
Contribution No. 618 |
| Keywords: | Cytokinin and flowering Flower initiation Gibberellin (GA4 epi-GA4 and flowering) Malus (flowering) |
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