Class 11 Biology Plant Growth Development Photoperiodism

Photoperiodism

  • The response of plants to periods of day/night is termed photoperiodism.
  • Some plants require the exposure to light for a period exceding a well-defined critical duration known as long day plants, whereas others must be exposed to light for a period less than this critical duration before the flowering is initiated in them, known as short day plants.
  • The plants in which there is no correlation between exposure to light duration and induction of flowering response; such plants are called day-neutral plants.
  • The site of perception of light/dark duration are the leaves.
  • There is a hormonal substance, which migrates from leaves to shoot apices for inducing flowering only when the plants are exposed to the necessary inductive photoperiod.

Class_11_Biology_Plant_Growth_And_Development_Photoperiodism

Fig. photoperiodism

Share these Notes with your friends  

< Prev Next >

You can check our 5-step learning process


.