What is the effect of the light intensity to transpiration?

Question

What is the effect of the light intensity to transpiration?

Answer 1

The guard cells ,which surround the stomata on the leaves of plants are the only epidermal cells on leaves which have chloroplasts. As a result when the guard cells photosynthesise they lead to a series of reactions which produces sugars leading to a decrease in water potential -and as water enters by osmosis the guard cells become turgid. This results in the stomata opening thus increasing CO2 supply for photsynthesis. Since the stomata open this will also increase the loss of water by transpiration which will increase.