ICSE Class 8 Answered
explain the factors affecting the rate of transpiration
Asked by nathsantanukumar | 03 Apr, 2018, 06:34: PM
Expert Answer
Factors Affecting the Rate of Transpiration:
Intensity of sunlight
- On a bright sunny day, stomata open fully, so transpiration is increased.
- On a cloudy day, stomata open partially, so transpiration is reduced.
- At night, stomata close; hence, transpiration is greatly reduced or negligible.
Temperature
- Increase in temperature of the air increases the rate of transpiration.
Velocity of wind
- Transpiration increases with rapid or active air movement.
Humidity
- If the air is humid, the rate of transpiration is reduced.
Carbon dioxide
- Increase in the CO2 level in the atmosphere over normal 0.03% causes stomatal closure. Hence, it decreases the rate of transpiration.
Atmospheric pressure
- With a decrease in atmospheric pressure, the rate of transpiration increases.
Answered by Sheetal Kolte | 04 Apr, 2018, 12:10: PM
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