ISHS Acta Horticulturae 418: III International Symposium on Artificial Lighting in Horticulture
POST-HARVEST WATER UPTAKE AND STEM CONDUCTANCE OF CUT ROSES CV SONIA GROWN WITH SUPPLEMENTAL LIGHTING |
| Author: | G. Slootweg |
| Abstract:
Roses grown with the use of supplemental lighting sometimes show problems with their water balance. Besides a disturbed stomata behaviour, differences in rehydration are found. For this study roses cv Sonia 'Sweet Promise' were grown in winter in the greenhouse with or without supplemental lighting (20 h SON/T; 24.5 μmol s-1 m-1). Cut roses grown with supplemental lighting (SL-flowers) rehydrated slower after a dry period of 2 hours than roses grown under natural light (NL-flowers). This difference in rehydration rate remained when transpiration was blocked. Hydraulic conductance of stem segments of SL-flowers was lower than that of NL-flowers, even after vacuum saturation with water. | |
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