Question
Explain how the following environmental factors increase the rate of transpiration.
i) Temperature
ii) Humidity
iii) Atmospheric pressure
i) Temperature
ii) Humidity
iii) Atmospheric pressure
Answer
i) Elevated atmospheric temperature leads to an increase in the leaf's temperature, subsequently raising the vapor pressure within the intercellular air spaces. This heightened vapor pressure prompts an increase in the rate of transpiration.
ii) When the atmosphere holds low humidity or is dry, the intercellular air spaces contain a greater amount of vapor compared to the air surrounding the leaf. This discrepancy results in an amplified diffusion gradient, subsequently leading to an increase rate of transpiration.
iii) Reduced atmospheric pressure contributes to heightened evaporation from a moist surface. This is due to the fewer hindrances encountered by evaporating molecules. As a consequence, there is an increase in the rate of transpiration.
ii) When the atmosphere holds low humidity or is dry, the intercellular air spaces contain a greater amount of vapor compared to the air surrounding the leaf. This discrepancy results in an amplified diffusion gradient, subsequently leading to an increase rate of transpiration.
iii) Reduced atmospheric pressure contributes to heightened evaporation from a moist surface. This is due to the fewer hindrances encountered by evaporating molecules. As a consequence, there is an increase in the rate of transpiration.
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