The epidermal cells of an onion peel were observed before and after plasmolysis. After plasmolysis, the protoplasm shrank away from the cell wall. The cell wall prevented the cell from bursting due to the shrinkage of the protoplasm during plasmolysis.

1. Epidermal cells of Onion peel before PLASMOLYSIS
Epidermal cells of Onion peel after PLASMOLYSIS
Shrinkage of protoplasm
away from the cell wall.
The presence of cell wall
prevents the bursting of the
cell