Transpiration is measured by

✅ Explanation: A potometer is a device used to measure the rate of transpiration in plants. It works by measuring the water uptake by a plant cutting, which is assumed to be equal to the rate of transpiration.

📌Other Options Explanations:
Lysimeter is used to measure the evapotranspiration rate. Tensiometer is used to measure soil moisture tension. Auxanometer is used to measure plant growth.

🔑Key Points :
-The rate of transpiration is checked by Potometer.
-A small amount of water is needed for the growth of plant rest 95-97% of water is lost by transpiration.
-Through leaves, transpiration occurs through stomata which are many openings on the surface of leaves.
-It depends on several factors like the surface area of leaves (bigger the surface area higher the transpiration), the number of stomatal openings, temperature (higher the temperature, higher the transpiration), and water supply.