Describe Transpiration of Plants with Types - QS Study
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Transpiration: The physiological process by which the excess water is lost from the living tissues of plants in the form of vapor is called transpiration.

Types: On the basis of the passages through which plants give out water in the form of vapor transpiration is of three types:

  1. Stomatal transpiration
  2. Cuticular transpiration
  3. Lenticular transpiration

Stomatal transpiration:  Transpiration that occurs through stomata called stomatal transpiration. This type of transpiration only occurs in its presence of sun light (in day time). Because stomata open in the present of sun light and closes in the darkness.

In this method plants give out 80-90% water in the form of vapor.

Cuticular transpiration:  Transpiration that occurs through the cuticle or cracks of thin cuticle layer of leaves and stems is said to be cuticular transpiration. This is a day night process. In this process 5-10% water is given out in the form of vapor.

Lenticular transpiration: Sometimes transpiration occurs through lenticels, small opening in the corky tissue covering stems and twigs, and this type of transpiration is said to be the lenticular transpiration. In this process only 0.1% water is given off of the forms of vapor.