Question

Comparison between stomatal and cuticular transpiration

Answer 1

stomatal transpiration is the loss of water from the leaves where is cuticle transpiration is impermeable covering present on the leaves and stem

Answer 2

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→ Stomatal Transpiration

*It occurs through minute pores called stomata present in epidermis of young stem and leaves.

*Loss of water through stomata is called stomatal transpiration.

*Opening and closing of stomata occurs due to osmotic changes in guard cells.

*When the guard cells are turgid, the Stomata get opened.

*When guard cells become flaccid, the Stomata get closed.

→Cuticular transpiration

*It takes place through the cuticle found on the surface of stems and leaves.

*Cuticle is a thin or thick layer on the epidermis of leaves and herbaceous stem.

*Cuticle reduces the use of water, but it is not strictly imprevious to water.

*Cuticular transpiration depends on the thickness of the cuticle.

*Thicker the cuticle less will be the rate of transpiration.

*Cuticular transpiration takes place throughout day and night.