Home
Class 11
BIOLOGY
Explain the factors influencing the rate...

Explain the factors influencing the rate of transpiration?

Text Solution

Verified by Experts

The important external factors that influence the rate of transpiration are:
1. Light: Light directly increases the rate of transpiration by inducing the opening of stomata. Starch is formed in the guard cells in the presence of light. Starch gets converted into sugars which absorb water into the guard cells. Guard cells become turgid, and stoma opens, and the rate of transpiration increases. When there is no light the stomata gets closed, and the rate of transpiration decreases.
2. Temperature: When temerature increases, the atmospheric humidity decreases and rate of transpiration increases and when temperature decreases, transpiration decreases.
3. Atmospheric humidity: It is the amount of water vapour present in the atmospheric air. When the atmospheric humidity is more, the rate of transpiration is less, and when atmospheric humidity is less the rate of transpiration is more.
4. Wind velocity: Plants produce a cloud of water vapour just above the leaves which reduces the rate of transpiration. When wind velocity removes the water vapour around the plant, then the rate of transpiration increases. But a very high wind velocity tends to close the stomata, and the rate of transpiration decreases.
5. Availability of soil water: When there is less soil water, the rate of water absorption is less, and rate of transpiration is also less.
Promotional Banner

Topper's Solved these Questions

  • TRANSPORT IN PLANTS

    SUBHASH PUBLICATION|Exercise THREE MARKS QUESTIONS AND ANSWERS|3 Videos
  • SUPER MODEL QUESTION PAPERS

    SUBHASH PUBLICATION|Exercise SUPER MODEL QUESTION PAPER - 3 (PART - D- Section II)|5 Videos

Similar Questions

Explore conceptually related problems

What is Transpiration?

Mention any four factors which inflyence the rate of transpiration in plants.

Define transpiration.

List the uses of Transpiration ?

Mention the factors affecting the rate of reaction.

Name any two factors affecting the rate of a reaction.

Mention any two factors which influence the rate of the reaction.

What are the factors which influence rate of a reaction.