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Question
Describe any three conditions which affect transpiration.
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Solution
The three conditions which affect transpiration are the following :
- Sunlight: In bright sunlight, the stomata remain fully open and transpiration takes place through the stomatal pores. At night stomata remain closed, so transpiration is reduced.
- Wind: If the Wind velocity is high, transpiration becomes rapid because the water vapour is carried away before the air around the leaf becomes saturated.
- Available water: If available water in the soil is low, the transpiration is low and the leaves may even begin to wilt.
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Transpiration is best defined as
Give suitable explanation for the following:
Water transpired is the water absorbed.
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More transpiration occurs from the lower surface of a dorsiventral leaf.
In an experiment, four freshly plucked leaves (A-D) of a plant, such as those of china – rose, were treated as follows:
(a) Coated with Vaseline on its upper surface.
(b) coated on the lower surface.
(c) coated on both surface
(d) left uncoated.
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The humidity of the atmosphere.
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Give a reason/suitable explanation.
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(b) Rewrite the false statement in (a) above in the correct form by changing either the first or the last word only.
Atmospheric humidity promotes transpiration from a green plant.
