Transpiration
Definition:The loss of water in the form of vapours from the living tissues of aerial parts of the plant is termed as transpiration.
Transpiration is a necessary evil”  Curtis

Transpiration

1. Water loss in the form of vapour

2. Occurs through stomata, cuticle or lenticels

3. Usually occurs during day time

4. Water vapours are pure and free of dissolved substances

5. It is a controlled phenomenon

6. Universal phenomenon and occurs in plant

7. The stomata of leaves become closed or open  according to the need, usually they remain open during day and closed during night.

8. It is controlled by the guard cells

9. Root pressure is not involved in transpiration.

Guttation: Loss of water in the form of liquid from the uninjured margins of the leaves is called guttation.

Guttation

1. Water loss in the form of water drops

2. Occurs through hydathodes*

3. Usually occurs during night

4. Guttation water has many dissolved substances

5. It is an uncontrolled phenomenon

6. It occurs only in some plants like grasses, Colocasia, tomato etc

7. The hydathodes remain open whole day and night

8. It is not controlled by guard cells

9. Guttation takes place due to the development of root pressure

* Hydathodes are special type of stomata called water stomata through which guttation takes place.

Learn more: Difference between Transpiration and Evaporation

15 Comments

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  1. please check the definition of the transpiration well."water from of vapours"

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  2. great. its really helped

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  3. Loss of excess of water in the form of water vapours

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  4. ITS REALLY EASY AND UNDERSTANDABLE.VERY HELPFUL

    ReplyDelete
  5. It is clarity and easy to understand

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  6. It is clarity and easy to understand

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  7. Gud explanation but nxt time give in tabular form plz.

    ReplyDelete
  8. This is very useful for us .So l told to thanks

    ReplyDelete
  9. Easy and briefly explained. Thanks!

    ReplyDelete

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