Differences in Water Uptake by Stem-end Treatments of Cut Rose Flowers

摘要

To optimize stem-end cutting method under transport stimulation conditions, water uptake potential was investigated in Rosa X hybrida, 'Calipso' and 'Vital' roses Seven stem-end cutting methods were applied to roses with or without transport simulation During storage at 15°C and 25°C , 'Calipso' rose showed largest water uptake by treatment of sharp-diagonal cut, while least water uptake by rough-horizontal stem-end cutting at both the temperatures. In the experiment of transport simulation combined with cutting treatments using 'Vital' roses, water uptake was significantly higher in sharp-diagonal treatment than in rough-horizontal treatment after transport simulation. Fresh weight was heavier by sharp-diagonal stem-end treatment than by rough-horizontal stem-end treatment. In contrast, there was no significant difference in water uptake and fresh weight between the cutting treatments when roses were not transport-simulated. Starting from the 5th day of the treatment, water balance began to reversed when water transpiration rate was higher than uptake in each treatment. Additional experiment on cutting area indicated that water uptake tended to increase in proportion to cutting areas.