Question

List 2 factors that increase the rate of transpiration?

Answer 1

1. Temperature. The higher the temperature, the more the transpiration because the rate of evaporation of water from the mesophyll cells increases the transpiration rate. The temperature of the leaf gets raised by absorbing the sunlight. This also increases the vaporization of water in the leaf which in turn increases the transpiration.

2. Light. Light affects transpiration by influencing the opening and closing of stomata. In most mesophytes, it causes stomata to open and hence increases the water loss from the plant.