What is Transpiration?
Transpiration is the loss of water from the aerial parts of the plant in the form of water vapor. There are three types of transpiration based on the location through which it occurs.
- Stomatal Transpiration: Evaporation of water occurs through stomata present on the leaf of the plant. About 90% of the water is transpired through the stomata of the leaves. Water is transformed into vapor near the leaf surface and evaporates through open stomata. Turgor pressure regulates the opening and closing of the stomata.
- Cuticular Transpiration: Here, the evaporation of water occurs through the cuticle of plants which is a waxy layer over the leaf surface. About 5 – 10% of water is transpired through the cuticle. In the dry environment, when plants close their stomata, this type of transpiration takes place.
- Lenticular Transpiration: This type of transpiration occurs through lenticels which are the small openings present on the bark or stem of the plants. A very small amount of water transpired through the cuticle in comparison to stomatal transpiration. It occurs in dry environments.
Transpiration Pull in Plants
An overview of transpiration pull in plants describes the details of transpiration pull, a physiological process that helps the plants pull the water from the soil to the leaves by a force generated within the xylem. This process starts when the stomatal opening of the leaf allows water and carbon dioxide to enter the plant.
As photosynthesis happens, water vapor is released through the leaf, causing a drop in air pressure within the leaf. This negative air pressure aids the water molecules to reach the leaf through the stem. In this article, we will look into transpiration pull – meaning, phenomenon, factors affecting, and significance of transpirational pull in plants.
Table of Content
- What is Transpiration?
- What is the Transpirational Pull?
- Cohesion Hypothesis
- The Phenomenon of Transpiration Pull in Plants
- Role of Transpiration Pull in Plants
- Conclusion – An Overview of Transpiration Pull in Plants
- FAQs on Transpiration Pull in Plants