Active absorption of water:
This kind of absorption takes place when the rate of transpiration is very low and the availability of soil water is high.
- In this process of absorption, metabolic energy of the cells is used.
- Roots actively participate in this type of absorption.
- Only 2 to 4% of total water is absorbed by this mechanism.
- During the night when the rate of transpiration becomes very low, this absorption becomes important.
- The activity of root cells results in a force in the water column of xylem due to which water rises up.
- This force is called root pressure.
