Question

Transpiration rate mainly depends on-

• A. Availability of blue light
• B. Difference of vapour pressure
• C. Atmospheric pressure
• D. Temperature

Answer 1

The correct option is C Atmospheric pressure

The rate of transpiration is also influenced by the evaporative demand of the atmosphere surrounding the leaf such as boundary layer conductance, humidity, temperature, wind and incident sunlight. Transpiration accounts for most of the water loss by a plant by the leaves and young stems.

So, the correct option is 'Atmospheric pressure'.