Photoperiodism
Photoperiodism: Overview
In this topic, we will discuss Photoperiodism as the response of plants to periods of day and night. This describes the effects of day and night in plants.
Important Questions on Photoperiodism
Chrysanthemum is an example of a short-day plant.

What are the four types of photoperiodism?

Photoperiodism allows some plant species of flower to switch to _____ mode.

Photoperiodism is the regulation of physiology or development in response to the length of daylight.

Short day plants generally require light period of less than 12 hours.

The length of night or dark period induce flowering of short-day plants.

Maximum inhibition of flowering with _____ light occurs at about the middle of critical dark period.

What are photo-inductive cycles?


List the sites of photoperiodic stimulus in plants.

What is critical dark-period phototropism?

Define critical day-length photoperiodism.



What is the key principle of photoperiodism?

The photoperiod in plants is perceived at

In photoperiodism, the site of perception of light/dark duration is -

Write a short note on photoperiodism.

Write a short note on photoperiodism.

What is phytochrome? What is the significance of it?
