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प्रश्न
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.
All the four leaves A, B, C & D were left in a room for about 24 hours.
(i) which leaf would become most limp? Why?
(ii) which leaf would show least limping? Why?
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उत्तर
(i) The leaf D would become most limp. This is because water would be lost through transpiration from upper as well as the lower surface of leaf D since it is uncoated.
(ii) The least limping would be shown by leaf C since its upper and lower surfaces have been coated with vaseline. So no water is lost from the leaf through transpiration since the stomatal openings get blocked by vaseline.
संबंधित प्रश्न
What is wilting? Some plants show wilting of their leaves at noon even when the soil is well watered, Why is it so?
Answer the following (only in few words);
What is the effect of temperature on transpiration?
Answer the following (only in few words);
What is the impact of more atmospheric pressure on transpiration?
Answer the following (only in few words);
What is the relationship between transpiration water and water absorbed from the soil?
Explain how the rate of transpiration is affected on:
a windy day
Mark the most appropriate answer in the following:
If the rate of transpiration becomes more than the rate of photosynthesis, plant will ______
Briefly explain how the rate of transpiration is affected by:
The intensity of light.
(a) State whether the following statement are True or False.
(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.
