Root pressure is defined as the positive hydrostatic pressure developed in the root cortical cells, which pushes water into xylem upto a certain height. Root pressure can be demonstrated in the following ways:
- Choose a well-watered soft-stemmed plant
- Cut the stem horizontally near the base with sharp blade.
- Drops of fluid ooze out of the cut stem indicates a positive hydrostatic pressure, the root pressure.
- If the cut end is contracted to a rubber tube, the liquid can be collected and the rate of exudation measured.
