ISHS Acta Horticulturae 80: Symposium on Growth Regulators in Fruit Production
THE ROLE OF SEED DERIVED HORMONES IN THE CONTROL OF FLOWERING IN APPLE |
| Author: | G.V. Hoad |
| Abstract:
Diffusates collected from apple fruitlets during the period prior to flower initiation have shown that more hormones move out of biennial flowering cultivars than from those which flower regularly. Within any one cultivar the amount of gibberellin in diffusates was dependent on the number of seeds in the fruit, but between cultivars no such relationship existed. Applying radioactive compounds to seeds of fruit attached to the tree confirm that Laxton's Superb, a strongly biennial cultivar, is able to move more solute out of the fruit than the more regular Cox's Orange Pippin. The possible involvement of hormones diffusing from fruits in the inhibition of flower initiation is discussed. | |
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