Transpiration:

Transpiration is the process by which plants lose water through their leaves in the form of water vapor. It occurs as a result of the exchange of gases between the plant and the atmosphere.

Process of Transpiration:

The process of transpiration can be broken down into the following steps:

1. Water is absorbed by the roots of the plant and transported to the leaves through a network of xylem vessels.

2. Once water reaches the leaves, it evaporates from the surface of the cells in the leaves and forms water vapor.

3. This water vapor then diffuses through small pores, called stomata, on the surface of the leaves and enters the atmosphere.

4. As water vapor leaves the leaves, it creates a negative pressure gradient, which pulls more water from the roots up through the xylem vessels.

Factors affecting Transpiration:

There are several factors that can affect the rate of transpiration in plants, including:

1. Temperature: As temperature increases, the rate of transpiration increases.

2. Humidity: As humidity decreases, the rate of transpiration increases.

3. Light: As light intensity increases, the rate of transpiration increases.

4. Wind: As wind speed increases, the rate of transpiration increases.

5. Soil moisture: As soil moisture decreases, the rate of transpiration decreases.

Importance of Transpiration:

Transpiration plays an important role in the survival of plants. It helps to transport water and nutrients from the roots to the leaves, where they are needed for photosynthesis. Transpiration also helps to cool the leaves of plants, which is important for maintaining optimal leaf temperature. Additionally, transpiration helps to maintain the turgor pressure of plant cells, which is necessary for plant growth and development.

water comes out of leaves in the form of vapour is called transpiration