ISHS Acta Horticulturae 430: VII International Symposium on Flowerbulbs
THE EFFECTS OF SCALE INCUBATION TEMPERATURE TREATMENTS ON NUMBER AND GROWTH OF REGENERATED BULBLETS, TO REDUCE PRODUCTION TIME OF COMMERCIAL LILY BULBS |
| Author: | A. Grassotti |
| Abstract:
The effect of several temperature treatments on the scale bulblets of Lilium x 'Polyanna' and L. longiflorum 'Snow Queen' was investigated with reference to bulb production, number, size and plant type. Scales were treated at 22°C, followed by a cold treatment (0°, 3°, 5°C), for a total of 14 or 11 weeks. Treatment at 22°C delayed emergence and promoted production of many small bulbs. When the 22°C treatment was followed by 0°C, the number of bulbs decreased and their size increased. Lilium x 'Polyanna' produced more bulblets per scale when treated only at 22°C, but bulblets were very poor; three weeks at 22°C with 5 or 8 weeks at 0°C promoted good bulb formation both in number and in weight. L. longiflorum 'Snow Queen' produced more bulbs per scale at 22°C given for 14 weeks or when this treatment was followed by treatments of 0°C or 3°C and 15°C. Epigeous type plants (ETP) were found following high temperature treatments in Lilium x 'Polyanna', whereas in L. longiflorum x 'Snow Queen' the occurrence of ETP plants was very low. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
