Advertisements
Advertisements
Question
Name the factors which affect the rate of transpiration? State their role in each case.
Solution
The following are the main factors that affect the rate of transpiration:
- Sunlight: During daytime, the rate of transpiration is faster. This is because the stomata remain open to allow the inward diffusion ofcarbondioxide for photosynthesis.
During dark, the stomata are closed, and hence transpiration hardly occurs at night. - Temperature: Transpiration is faster on hot summer days as compared to cold winter.
- Wind: Transpiration is more when the wind is blowing faster as water evaporates faster from the leaves.
- Humidity: Transpiration is reduced if the air is humid. Air cannot hold any water molecules when it is already laden with moisture (humidity).
- Low atmospheric pressure: The rate of transpiration increases when the pressure is low.
APPEARS IN
RELATED QUESTIONS
Which one of the following favours the fastest transpiration rate?
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Most transpiration occurs during midday.
Choose the correct answer:
Transpiration is more ____________
Given below is an example of a certain structure and its special functional activity:
chloroplasts and photosynthesis
In a similar way, write the functional activity against the following:
Xylem and ______
Briefly explain how the rate of transpiration is affected by:
Humidity of the atmosphere
Give Reasons for the following:
Balsam plants wilt during midday even if the soil is well watered.
Give Technical Term
Main function of lenticel.
Transpiration is significant for all except ______.
Give a reason/suitable explanation.
Forests tend to bring more rains.
