ISHS Acta Horticulturae 673: IX International Symposium on Flower Bulbs
EFFECT OF ALTERNATING AND CONSTANT TEMPERATURE ON SEED GERMINATION OF CHELCHERAGH LILIY (LILIUM LEDEBOURII) IN IRAN |
| Authors: | M.N. Padasht Dehkaei, A. Khalighi, R. Naderi, A. Moosavi |
| Keywords: | Lilium ledebourii, Chelcheragh lily, seed germination, epicotyl dormancy |
| Abstract:
Lilium ledebourii (Chelcheragh lily) is distributed in the Damash of Ammarloo and Kalchooleh of Dorfak areas of Guilan province in Iran. Seed germination was promoted at constant 17°C or 14°C and inhibited at constant 26°C or 29°C. When seeds were treated initially at 29°C or 26°C followed by 14°C and 17°C, respectively, germination percentage was increased. While when seeds were exposed to alternating temperature (initially at 14°C and 17°C followed by 29°C and 26°C), seed germination was the lowest or inhibited. In other experiments, seeds were pre-treated for 0, 1, 2, 3, or 4 weeks at 3-5°C, then planted in pots and placed at constant 15, 20, 25, or 30°C. Germination percentage was the lowest at 15 and 25°C and completely inhibited at constant 30°C, regardless of the duration at 3-5°C. Only when seeds were pre-treated at 3-5°C for one week, germination percentage was the highest at 20°C. Also, germination percentage at constant 20°C without cold temperature was about 50%. Germination percentage was recorded as a bulblet and root forming per seed. Bulblets were initially dormant, and leaves did not emerge. When bulblets were treated at 3-5°C for 12 weeks, sprouting of seed bulblets prodeeded directly at 20°C. | |
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