Question

Root pressure develops due to:

• A. Increase in transpiration
• B. Active absorption
• C. Low osmotic potential in soil
• D. Passive absorption

Answer 1

The correct option is B Active absorption

Due to active absorption of minerals, high osmotic potential is created. To reduce osmotic potential, water is absorbed, and hence, water potential is increased inside the xylem. Increased water potential also increases pressure in the xylem and this positive pressure is known as root pressure.