Photoperiodism
Videos
Photoperiod is the change of day length over the seasons. Earth's rotation around its axis produces 24-hour changes in light and dark cycles on Earth. The length of the light and dark in each phase va
Pr converts to Pfr during the day time and Pfr slowly reverts to Pr during the night time. When nights are short, an excess amount of Pfr remains in the day time and during long nights, most of the Pfr is reverted to Pr.
Long Day Plants
Short Day Plants
Scotobiology
Videos
Scotobiology is the study of biology as directly and specifically affected by darkness, as opposed to photobiology, which describes the biological effects of light.
Photoperiodism
…Seasonal Breeder Scotobiology Epigenetics of plant growth and development § Photoperiodism…
A European badger, active at night.