Question

Explain the process of Transpiration.​

Answer 1

Answer:

Transpiration is the loss of water from a plant in the form of water vapor. Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem. In the leaves, small pores allow water to escape as a vapor. Of all the water absorbed by plants, less than 5% remains in the plant for growth.

Answer 2

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★The loss of water in the form of water vapour from the aerial parts of the plant body is called Transpiration.

How will you demonstrate transpiration when you tie with a plastic bag?

Ans:

Tie a plastic bag over leaves of rose plant and place in sunlight. After a few hours, we see water condensing inside the plastic bag. This is due to loss of water in the form of water vapour, which condenses into water. This is due to transpiration.

ADDITIONAL INFORMATION:

1. There are three types of transpiration:
2. Stomatal transpiration: Loss of water from plants through stomata. It accounts for 90- 95% of the water transpired from leaves.
3. Cuticular transpiration: Loss of water in plants through the cuticle.
4. Lenticular transpiration: Loss of water from plants as vapour through the lenticels. The lenticels are tiny openings that protrude from the barks in woody stems and twigs as well as in other plant organs.
5. But transpiration is necessary for the following reasons.

• It creates a pull in leaf and stem.
• It creates an absorption force in roots.
• It is necessary for continuous supply of minerals.
• It regulates the temperature of the plant.