Passive Absorption of Water in Plants from Soil

Passive Absorption of Water in Plants from Soil

Passive Absorption of water in plants from soil:

The organ by which plant Absorbs water: Plant absorbs water by root hair

The water which plant absorbs: Only capillary water remaining inside the fine spaces of soil particles is absorbed by plants.

Passive absorption: A scientist, named Kramer explained this method. According to him, Diffusion Pressure Deficit (D.P.D) is made in the mesophyll tissue due to transportation. The D.P.D gradually passes through leaf, stern and root and ultimately reaches the root hairs. As a result, the suction pressure is produced and plants absorb capillary water from the soil. No metabolic energy is ensured in this process. Rapid transpiration removes water and reduces turgor pressure in living cells of the root. The suction force thus developed is transmitted to root xylem. It pulls water from surrounding root cells to make up water deficit.

As a result, soil water enters into the cortical cells through root hairs to reach the xylem of roots to preserve the supply of water. The force for this entry of water is created in leaves due to rapid transpiration and hence, the root cells stay behind passive during this procedure.