Introduction

Water has manifold importance in plant body. Before taking up the intake of water by plants, it is necessary to understand-imbibition, diffusion, osmosis and osmotic pressure.

Imbibition
The absorption of water by hydrophilic surface is called imbibition e.g. swelling of seeds immersed in water is due to imbibition of water by proteins and cellulose,

Demonstration of imbibition