The effect of day/night temperature on Pharbitis nil chois. Flowering

Cheryl L. Reese, John E. Erwin

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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 languageEnglish (US)
Pages (from-to)1046-1048
Number of pages3
Issue number6
StatePublished - Oct 1997


  • Average daily temperature
  • Flower induction
  • Flower initiation
  • Irradiance
  • Japanese morning glory
  • Photoperiodism


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