AP BIOLOGY

Detailed explanation-1: -Photoperiodism is the response to changes in daylength that enables plants to adapt to seasonal changes in their environment. The best studied example of photoperiodism in plants is flowering, but other responses to daylength include bud dormancy and bulb or tuber initiation.

Detailed explanation-2: -Photoperiodism is a plant’s response to the number of hours of darkness in its environment.

Detailed explanation-3: -Photoperiodism is the regulation of physiology or development in response to day length. Photoperiodism allows some plant species to flower-switch to reproductive mode-only at certain times of the year.

Detailed explanation-4: -What Is Photoperiodism? The relative length of day and night is known as photoperiod. Some plants need to be exposed to sunlight for a particular duration of time to induce flowering.

Detailed explanation-5: -Prolongation of the continuous dark period initiates early flowering. These plants require longer day light period (usually 14-16 hours) in a 24 hours cycle for subsequent flowering. These plants are also called as short night plants. E.g. Wheat, radish, cabbage, sugar beet and spinach.