Photoperiodism

Definition

Photoperiodism is the physiological reaction of organisms to the length of day or night. It triggers flowering, hibernation, migration and other behaviors.

Related terms

Circadian Rhythms: These are physical, mental, and behavioral changes that follow a daily cycle. They respond primarily to light and darkness in an organism's environment.

Phytochrome: This is a type of photoreceptor in plants that absorbs light in the red and far-red region of the visible spectrum. It helps regulate plant processes such as seed germination and shade avoidance.

Biological Clocks: These are internal timing devices that are genetically set to regulate various physiological responses for different periods of activity, rest, feeding, etc.