The Role and Effectiveness of Stimulative-Inhibitive Regulators on Early and Late Blooming of Fruit Trees

  • N. Kaska
Part of the Nato Advanced Study Institutes Series book series (NSSA, volume 22)


To be able to control the opening of buds has been one of the most important interests of fruit tree physiologists for centuries. They have been looking for a magic substance, chemical, etc. to help reach this goal. The search for this substance or chemical has been carried out in nearly every fruit growing part of the world by pomologists, who have performed many experiments and added much valuable information to our knowledge of this subject. The pomologists in the temperate zone, where spring frosts (especially the late ones) often kill the flowers, were interested in finding a way to delay flowering. On the other hand, the physiologists in the subtropical zone, where the winters are warm and therefore the chilling requirements of many deciduous trees are not satisfied, were looking for efficient rest breaking agents. At first glance, the objectives of these two types of scientists look quite opposite, but in fact they are the same: to be able to control bud openings. The best way to approach developing this magic substance or chemical was, of course, to study the plants: how was the plant controlling blooming? Therefore, the efforts of physiologists were concentrated on determining the control mechanism of blooming in plants. Eventually they came to the conclusion that the magic substance is in the type of phytohormone or plant growth regulator.


Gibberellic Acid Fruit Tree Sour Cherry Stone Fruit Chilling Requirement 
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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • N. Kaska
    • 1
  1. 1.University of CukurovaAdanaTurkey

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