Advertisements
Advertisements
Question
What is wilting? Some plants show wilting of their leaves at noon even when the soil is well watered, Why is it so?
Advertisements
Solution
Wilting refers to the loss of cellular turgidity in plants which results in the drooping of leaves or plant as a whole because of lack of water.
During noon the rate of transpiration exceeds the rate of absorption of water by roots. Due to the excessive transpiration, the cells of leaves lose their turgidity and wilt.
RELATED QUESTIONS
With decrease in atmospheric pressure, the rate of transpiration will
Transpiration will be fastest when the day is
Transpiration is best defined as
Give suitable explanation for the following:
Water transpired is the water absorbed.
List any three major factors that accelerate the rate of transpiration.
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?
Briefly explain how the rate of transpiration is affected by:
The humidity of the atmosphere.
Describe any three conditions which affect transpiration.
How does the rate of Transpiration differ when there is High temperature?
Give a reason/suitable explanation.
Transpiration increases with the velocity of the wind.
