Question

List the factors that affect the rate of transpiration.

Answer 1

The water absorbed by the root is utilised for various activities in plants, but most of the water is lost through the leaves The lows of water in the form of water vapour from the serial parts of the plant is known as transpiration.

Factors affecting the rate of transpiration:

1. Sunlight-The rate of transpiration is faster on a sunny day as the opening of the stomata is influenced by light.
2. Temperature-The rate of transpiration is faster on a hot day as the rate of evaporation is faster.
3. Wind- Moderately blowing wind increases the rate of transpiration as water vapour is removed quickly from the leaves.
4. Humidity- On a humid day, the rate of transpiration reduces as the air is already laden with water vapour. On the other hand, if humidity is less, transpiration is more.