ISHS Acta Horticulturae 329: VII International Symposium on Plant Growth Regulators in Fruit Production
THE RESPONSE OF PEACH PLANTS GROWN IN HYDROPONIC SYSTEM TO GIBBERELLIN BIOSYNTHESIS INHIBITORS (GBIS). |
| Authors: | B. Avidan, A. Erez |
| Abstract:
The effects of gibberelin biosynthesis inhibitors (GBIs) on top and root development was followed in peach plants using an hydroponic system. The earliest detected morphological phenomenon was the decrease in root growth rate followed by thickening of the root tips, 3 days after GBIs application. On the termination of exposure to GBI, a much longer and stronger retarding effect was observed on tree top than on tree roots, resulting in a reduced to:/root ratio. Root thickening in response to paclobutrazol (PBZ), was detected also when only the top was treated with the inhibitor, indicating a basal movement of PBZ. Controlled top growth resulted in a reduction in water consumption in the PBZ treated plants to about one third of that of the control, while leaf weight was reduced to about one half. | |
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