Question

The most important factor in regulating transpiration in plants is

Answer 1

Plants regulate the rate of transpiration by controlling the size of the stomatal apertures. 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.

Answer 2

these are humidity,intensity of sunlight,temperature,boundary layer conductance,wind and incident sunlight.