THE INTERACTION OF TEMPERATURE AND PHOTOPERIOD ON GROWTH AND FLOWERING OF LILIUM LONGIFLORUM THUNB. CV.'NELLIE WHITE'

H.F. Wilkins, E. Waters
Plants from non-cooled bulbs of the cv. 'Nellie White' were grown at 15° or 21°C, and were exposed upon emergence to sequential long days (LD's). After the LD treatments plants grown at 15°C were shifted to 21°C and vice versa. LD treatments were not effective at 21°C. After 20 or more LD's at 15°C, a 21°C temperature hastened flowering. Bulbs of cv. 'Nellie White' were given a 4°C cold treatment for 0, 1, 2, 3, 4, 5, or 6 weeks. Upon emergence the above respective treatments were given 6, 5, 4, 3, 2, 1, or 0 weeks of LD's. All treatments received 6 weeks of cold and/or LD's. These experiments determined that there was a near interrelationship between the cold and LD stimuli. All treatments had similar flowering dates.
Wilkins, H.F. and Waters, E. (1971). THE INTERACTION OF TEMPERATURE AND PHOTOPERIOD ON GROWTH AND FLOWERING OF LILIUM LONGIFLORUM THUNB. CV.'NELLIE WHITE'. Acta Hortic. 23, 48-57
DOI: 10.17660/ActaHortic.1971.23.6
https://doi.org/10.17660/ActaHortic.1971.23.6

Acta Horticulturae