POST-HARVEST VARIATION OF FREE ARGININE IN BASAL PLATE TISSUES OF TULIP BULBS ; RELATION TO BULB PHYSIOLOGICAL EVOLUTION

M. Le Nard, V. Fiala
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.

Le Nard, M. and Fiala, V. (1990). POST-HARVEST VARIATION OF FREE ARGININE IN BASAL PLATE TISSUES OF TULIP BULBS ; RELATION TO BULB PHYSIOLOGICAL EVOLUTION. Acta Hortic. 266, 293-298
DOI: 10.17660/ActaHortic.1990.266.38
https://doi.org/10.17660/ActaHortic.1990.266.38

Acta Horticulturae