Question

what are the types of transpiration

Answer 1

The following three points will highlight the three major types of transpiration. The three major types of transpiration are: (1) StomatalTranspiration (2) LenticularTranspiration and (3) CuticularTranspiration. Transpiration mainly takes place through surface of leaves

Answer 2

$\sf{\underline{\underline{Types\:of\:transpiration:}}}$

Based on the plants parts or structure involved, following four types can be recognised:

$\implies$ $\sf{Stomatal\: transpiration}$

$\implies$ $\sf{Cuticular\: transpiration}$

$\implies$ $\sf{Lenticular\: transpiration}$

$\implies$ $\sf{Bark\:transpiration}$


1. $\text{\underline{Stomatal\: transpiration:}}$


$\bullet$ It is the transpiration that occurs through the stomata.

$\bullet$ The epidermis of leaves and green stems have numerous stomata.

$\bullet$ These are responsible for about 50-97% of the total water transpired.


2. $\text{\underline{Cuticular\: transpiration:}}$


$\bullet$ Water vapours are also lost directly from the outer walls of the epidermal cells through the cuticle.

$\bullet$Cuticle is the wax like layer of cutin that covers the epidermis of leaves and stems.

$\bullet$It reduces the water loss but may give out water vapours through the cracks.

$\bullet$It commonly constitutes 3-10% of total transpiration.

$\bullet$It is maximum upto 50% in herbaceous plants, ferns etc. growing in shady places.


3. $\text{\underline{Lenticular\: transpiration:}}$

$\bullet$Lenticels are aerating pores in the cork of the woody stems, twigs and fruits.

$\bullet$Water vapours are lost through these openings.

$\bullet$The amount of water vapours lost through lenticels is usually insignificant.


4. $\text{\underline{Bark\: transpiration:}}$

$\bullet$This occurs though the bark of woody stem.

$\bullet$It contributes about 1% of the total transpiration.