ISHS Acta Horticulturae 266: V International Symposium on Flower Bulbs
POST-HARVEST VARIATION OF FREE ARGININE IN BASAL PLATE TISSUES OF TULIP BULBS ; RELATION TO BULB PHYSIOLOGICAL EVOLUTION |
| Authors: | M. Le Nard, V. Fiala |
| DOI: | 10.17660/ActaHortic.1990.266.38 |
| Abstract:
At harvest, basal plate tissues (including apical bud) of tulip bulbs, of cvs. "Apeldoorn", "Lucky Strike" and "Lustige Witwe", show different free arginine contents. For the 3 cvs., the arginine contents remain stable or slightly decrease when the bulbs are stored at 0°C while they steadily increase when the bulbs are stored for 1 or 2 weeks at 34°C. In the case of "Apeldoorn", annual differences in the arginine contents have also been observed. The increase of arginine content at high temperature takes place simultaneously with a physiological evolution of the bulbs which is expressed in a stronger reaction to a subsequent cold treatment and in the acquisition of the capacity to show a faster flower bud differentiation. Checking the arginine content of the basal plate tissues of a tulip bulb at harvest could thus give an indication on its physiological state. | |
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