Question

The rate of transpiration in plants is dependent upon

• A. Temperature and soil
• B. Light and temperature
• C. Wind, temperature and light
• D. Light, temperature, atmospheric humidity and wind

Answer 1

The correct option is D Light, temperature, atmospheric humidity and wind

Transpiration is a physical as well as the physiological process in which water is evaporated in the form of vapour from aerial parts of plants, particularly with the help of structures known as stomata. Stomata usually open during day time (i.e., light). Increase in temperature increases the rate of transpiration. High atmospheric humidity reduces the process of transpiration and wind increases the rate of transpiration. Thus, rate of transpiration is dependent upon factors like light, temperature, atmospheric humidity and wind.