Question

Rate of transpiration is related to

• A. Light and temperature
• B. Light, temperature, atmospheric humidity and wind
• C. Light, temperature and wind
• D. Soil and temperature

Answer 1

Answer: (B)

Light, temperature, atmospheric humidity and wind

• The climatic aspects that influence the rate of transpiration are light, relative humidity, temperature, availability of water, and wind.
• High humidity results in decreasing transpiration rate.
• If there is an increase in temperature then transpiration increases.
• Wind also increases transpiration and evaporation, wind removes water vapour from nearby the leaves increasing water vapour pressure gradient.
• Light helps to increase in transpiration rate, by causing the stoma to open. Wider the stomata faster the diffusion process of water vapour out of the leaf.

So, the correct answer is option B.