Name: Carbon Dioxide: Vital Raw Material of Photosynthesis
Uploaded: 2019-07-19
Duration: 3 min 37 s
Description: Plants fix carbon dioxide during photosynthesis to produce sugar. Hence, carbon dioxide is a vital raw material for photosynthesis. Let's establish this fact...

Question

Give a brief description about the different sites of transpiration.

Accepted Answer

Transpiration, the loss of water vapour from plants, is a physical process that is under control of both external physical and physiological factors. The three major types of transpiration are: ( $1$ ) Stomatal Transpiration ( $2$ ) Lenticular Transpiration and ( $3$ ) Cuticular Transpiration.
1. Stomatal transpiration: The loss of water vapour through the opening of the leaves is called stomatal transpiration. It is the most dominant form of transpiration. It is responsible for undefined loss of water in plants.

2. Cuticular transpiration: It occurs through the cuticle or epidermal cells of the leaves and other exposed parts of the plant. In common land plants cuticular transpiration is only undefined of the total transpiration. In herbaceous shade loving plants where the cuticle is very thin, the cuticular transpiration may be upto $50 %$ of the total. Cuticular transpiration continues throughout day and night.

3. Lenticular transpiration: It is found only in the woody branches of the trees where lenticels occur. The lenticular transpiration is only undefined of the total transpiration. It, however, continues day and night because lenticels have no mechanism of closure. The lenticels connect the atmospheric air with the cortical tissue of the stem through the intercellular spaces present amongst the complementary cells.

Give a brief description about the different sites of transpiration.

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