What is transpiration? Why is the use of transpiration? Write any three environmental factors that affect transpiration.
Transpiration is the process of loss of water in the form of water vapors from aerial plant parts. It is a naturally occurring process. It is useful to plants in many ways: (a) Xylem sap moves with the help of transpiration. (b) The surface of the leaf cools down with the help of transpiration and thus protects the leaf from intense sunlight. Following factors affect the transpiration process: (a) Humidity/Moisture: In high humidity, water is lost slowly in the atmosphere. (b) Temperature: With a 10°C rise in temperature, the transpiration rate doubles up. (c) Speed of wind: Dry and high-speed wind increases transpiration.
