ISHS Acta Horticulturae 465: IV International Peach Symposium
COMBATING FLOODING DAMAGE IN PEACH TREES |
| Authors: | A. Gur, A. Gabai, J. Mouyal |
| Keywords: | Ethanol, ethylene, ethane, citrate, 8-hydroxyquinoline sulfate |
| DOI: | 10.17660/ActaHortic.1998.465.76 |
| Abstract:
The aplication of tri-potassium citrate or 8-hydroxy quinoline-hemisulfate (HQS) to periodically flooded one year-old peach seedlings increased their total fresh weight gain, and particularly the fresh weight gain of their roots as compared to untreated flooded plants. The weight of fine roots as a percentage of the total root system was much reduced by flooding and rose by application of both chemicals. A combined application of both chemicals did not result in additional advantage. The production of ethylene from 1-aminocyclopropane-1-carboxylic acid (ACC) increased much by the addition of leaf tissue from flooded plants as compared to non-flooded ones and so did the ethylene and the ethane content of the internal leaf atmosphere and the ethanol content of the leaves and the stem bark. All these parameters were much reduced by the application of citrate or HQS to the flooded plants. Citrate also reduced shoot death and enhanced the growth of terminal shoots of bearing peach trees flooded for a long period. No advantage was obtained by a combined application of citrate and HQS. Yields of peach trees growing in poorly aerated clay soil were improved by the application of proper amounts of citrate to the trees, and this particularly in the second year of application. The average fruit weight tended also to increase under the influence of citrate. | |
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