What is the Difference Between Stomatal Lenticular and Cuticular Transpiration?

The difference between stomatal, lenticular, and cuticular transpiration lies in the mechanism through which water is lost in plants. Transpiration is the evaporative water loss seen in plants, and it plays a crucial role in keeping the plant cool and facilitating nutrient absorption. The three main types of transpiration are:

1. Stomatal Transpiration: This is the most significant type of transpiration, accounting for about 85-90% of water loss in plants. It occurs through stomata, which are small openings found mainly on the surface of leaves and green shoots. Stomatal transpiration facilitates gaseous exchange and the photosynthesis process, which occurs during the daytime. It is the primary mechanism for water movement throughout the plant.
2. Lenticular Transpiration: This type of transpiration accounts for about 1% of the total water lost by transpiration. It occurs through lenticels, which are porous openings on the woody plants. Lenticular transpiration occurs throughout the day and night, and it is less significant than stomatal transpiration.
3. Cuticular Transpiration: This type of transpiration causes about 5-10% of the total transpiration. It occurs through the cuticles or external membrane of the plant. Cuticular transpiration is less than stomatal transpiration but more than lenticular transpiration.

In summary, stomatal transpiration is the most significant type, occurring through stomata and primarily during the daytime, while lenticular transpiration is a less significant process occurring through lenticels. Cuticular transpiration, on the other hand, occurs through the cuticles of the plant and accounts for a smaller percentage of water loss.

Comparative Table: Stomatal Lenticular vs Cuticular Transpiration

Here is a table summarizing the differences between stomatal, lenticular, and cuticular transpiration:

In summary, stomatal transpiration is the primary mechanism for water loss in plants, accounting for 85-90% of total transpiration. Lenticular transpiration occurs through lenticels, primarily on woody stems, and accounts for less than 1% of total water loss. Cuticular transpiration takes place through the waxy cuticle layer covering the plant surface and contributes to 5-10% of total transpiration.