Imbibition is the phenomenon of adsorption of water by the solid particles of a substance without forming a solution.
Importance of Imbibition to the Plants
Imbibition is the initial step in seed germination.
Imbibition causes swelling of seeds and results in the breaking of testa.
Imbibition is dominant in the initial stage of water absorption by roots.
The water moves into ovules which are ripening into seeds by imbibition.
Wilting
On hot and dry days, transpiration exceeds absorption. The turgor pressure is reduced, the cells become flaccid and the shoots and leaves, droop. This is wilting. It is temporary and can be remedied by sufficient watering. During wilting not only the protoplasm but the whole cell including the cell wall shrinks.
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Imbibition is the initial step in seed germination. 
Imbibition causes swelling of seeds and results in the breaking of testa. 
Imbibition is dominant in the initial stage of water absorption by roots. 
The water moves into ovules which are ripening into seeds by imbibition. 
