Significance of osmosis :

1. Entry of soil water into roots is carried out by osmosis.

2. Cell to cell movement of water occurs by osmosis. 

3. Living cells remain distended or turgid only by the osmotic entry of water into them, 

4. The soft organs like leaves, fruits and young stems are able to keep themselves stretched and swollen due to turgidity of their cells which is dependent upon osmosis. 

5. Osmosis plays a key role in the growth of radicle and plumule during germination of seeds. 

6. Many plant movements like the folding and drooping of leaves in Mimosa are brought about by osmosis. 

7. The stomata open and close only in response to increasing of the osmotic pressure of the guard cells in relation to nearby epidermal cells. 

8. High osmotic pressure has been found to protect the plants against drought and frost injury. Seeds and spores are similarly able to pass through the un favourable periods due to high osmotic pressure (or low solute potential).