ISHS Acta Horticulturae 23: I International Symposium on Flowerbulbs
GUMMOSIS OF TULIP BULBS CAUSED BY ETHYLENE |
| Authors: | G.A. Kamerbeek, A.L. Verlind, J.A. Schipper |
| Abstract:
Gummosis of tulip bulbs was evaluated on the basis of the total area of the gum blisters formed. Very small quantities of ethylene proved to be able to cause gummosis. A concentration of about 0.1 ppm appeared to be a threshold value for bulbs in a highly responsive stage. The 'Apeldoorn' bulbs showed maximal reaction two to four weeks after lifting. Only certain cultivars, for instance 'Apeldoorn', 'Enterprise', and 'Bartigon', were reactive; others, for instance 'White Sail' and 'Red Champion', showed hardly any effect due to ethylene. The gummosis process appeared to be temperature dependent. | |
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