“THE TIMING MECHANISM used in photoperiodism seems in most cases to be based on endogenous circadian rhythms in light sensitivity, as first postulated by Bunning (1936). He suggested that the circadian clock consisted of two half cycles, photophil and scotophil. When light was received in the scotophilic phase, the daily cycle was perceived as an long day, but the absence of light during the scotophilic phase produced an short day response. Support for these circadian clock-based models was initially provided by physiological studies.”
https://lnkd.in/d_f7kfY
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022