Question

Which among the following factors function in developing root pressure?

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

Answer 1

The correct option is D Active absorption

As ions move into the root by active absorption, water potential in the soil increases and solute potential or the osmotic potential in the soil decreases due to which water moves into the root from the soil and creates a positive pressure.

The positive hydrostatic pressure developed in the xylem of root is called root pressure which pushes the water column up in the plant.