Root Pressure

Positive pressure of sap in the roots of plants, due to its hypertonicity in relation to water in the soil.

Plant roots absorb water and minerals from the soil. To do this, the roots create a positive sap pressure within themselves, which is called root pressure.

This pressure occurs because the concentration of solutes in the root sap is much higher than in the soil solution. This difference in concentration is called hypertonicity. Because of it, water from the soil enters the roots along a concentration gradient - from lower to higher.

Thus, root pressure allows plants to efficiently absorb water and nutrients needed for growth and development. It is an important physiological mechanism that provides mineral nutrition to plants.