Question

Force developed in cortex of root which pushes water into xylem of root is

• A. Root pressure
• B. Turgor pressure
• C. Osmotic pressure
• D. Diffusion

Answer 1

The correct option is A Root pressure

Force developed in cortex of root which pushes water into xylem of root is root pressure. As various minerals ions from the soil are actively transported into the vascular tissue of the roots, water follows and increase the pressure inside the xylem. This positive pressure is called root pressure. It also refers to the positive hydrostatic pressure which can be responsible for pushing up water column to a small height in the stem of herbaceous plants. The effect of root pressure is observable during early morning and at night, when transpiration is low; it decreases as the day advances.