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English
Noun
photophil
- The phase of a two-phase circadian rhythm associated with light and expenditure of energy.
- Coordinate term: skotophil
1975, Science progress - Volume 62, page 120:It will be seen that light at one phase of the rhythm promoted flowering, and at the other phase inhibited it; thus there was a distinct manifestation of photophil and skotophil phases.
2010, Randy J. Nelson, David L. Denlinger, David E. Somers, Photoperiodism: The Biological Calendar, →ISBN, page 12:Short-day effects were seen to result when light was restricted to the photophil, while long-day effects were produced when light encroached into scotophil (figure 1.2).
2013, Beatrice M. Sweeney, Rhythmic Phenomena in Plants, →ISBN, page 118:He postulated that light falling on the plant in the scotophil phase would inhibit flowering, and in the photophil phase, enhance flower production.