Question

Explain the term:

Cuticular transpiration

Answer 1

1. Cuticular transpiration is the loss of water vapor from the surface of leaves through the cuticle, a waxy layer that covers the epidermis.
2. It accounts for a small portion of total transpiration (usually around 5-10%).
3. The cuticle is meant to prevent water loss, but some water still escapes through it.
4. It occurs more when the cuticle is thin or damaged, or under high humidity and temperature.
5. This type of transpiration is non-stomatal, meaning it doesn’t involve stomata.
6. It helps regulate water balance but is less efficient compared to stomatal transpiration.