ISHS Acta Horticulturae 47: II International Symposium on Flower Bulbs
DORMANCY OF SEEDS AS COMPARED WITH DORMANCY OF BULBS IN TULIPS |
| Authors: | E.J. Fortanier, G. van Brenk |
| Abstract:
The influence of temperature on seed dormancy was studied and compared with data for bulbs. Temperatures below 15°C break dormancy of seeds with an optimum around 5°C. Temperatures above 15°C increasingly inactivate a preceding partial chilling, with an optimum around 30°C. Both actions are quantitative, depending on level and duration of the temperature and on the genotype of the seed. Temperature effects on seed dormancy are very similar to chilling effects on bulbs, but the latter cannot be réversed. This indicates a different physiological mechanism and does not support the idea that seed and bulb dormancy have a common genetical basis. | |
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