Difference between Transpiration and Evaporation

Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves.
transpiration
Evaporation

evaporation
Transpiration vs Evaporation
Transpiration
1. It is physiological process and occurs in plants.

2. The water moves through the epidermis with its cuticle or through the stomata.

3.  Living cells are involved.

4. Various forces such as vapour pressure, osmotic pressure, etc are involved.

5. Formation of vapours continues for some time even after the saturation of outside air.

6. The rate of transpiration is slightly lower than evaporation under the influence of wind velocity because it lowers the leaf temperature.

7. It is largely dependent upon absorption of water from the soil.
Evaporation
1. It is a physical process and occurs on any free surface.

2. Any liquid can evaporate. The living epidermis and stomata are not involved.

3. It can occur from both living and non living surfaces.

4. Not much forces are involved.

5. Evaporation stops when the air is fully saturated.

6. It varies directly according to the velocity of wind.

7. It  continues as long as water is available on the surface.

Learn more: Difference between Transpiration and Guttaion
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2 comments:

Anonymous said...

good site with detailed picture of transpiration

Andy Crossfield said...

In an acre of corn and an acre on a lake, which would drive more water into the air? Just curious...

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