Abstract
The interaction between day/night temperature (DT/NT) and irradiance during the photoperiod prior to the inductive night on Pharbitis nil (L.) cv. Violet flower induction was studied. Plants exposed to 12 or 18 °C NT did not flower regardless of DT. When NT was 24 or 30 °C, percent flowering plants increased progressively as DT increased from 12 to 30 °C. Percent flowering plants and total flower bud number per plant was greatest when seedlings were induced with a 24 or 30 °C DT/30 °C NT regime. DT/NT did not affect the node number to first flower. Irradiance did not affect flowering. Temperature effects on P. nil flowering could be described as a function of average daily temperature, where flowering increased as temperature rose from 22 to 30 °C.
Original language | English (US) |
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Pages (from-to) | 1046-1048 |
Number of pages | 3 |
Journal | HortScience |
Volume | 32 |
Issue number | 6 |
DOIs | |
State | Published - Oct 1997 |
Keywords
- Average daily temperature
- Flower induction
- Flower initiation
- Irradiance
- Japanese morning glory
- Photoperiodism