When you place a cell into a hypotonic solution, water rushes into it and it bursts/lyses. Thus, the cell dies.
However, when you place a cell into a hypertonic solution, water rushes out of it and it shrivels. The membrane is still in tact and all the organelles are still held inside. Why is having a shriveled cell a problem then?
In the case of plants, shriveled cells are a huge problem. When plant cells are put in a hypertonic solution, the cell wall remains turgid and stays that way but the plasma membrane doesn't, it shrinks as you already know with the other organelles as well. This is known as plasmolysis. If this situation continues it causes death.
Shrivelling causes the plant to wilt too.
Well it does have affects overall and at cellular level
It changes the RMP(resting membrane potential) across the cell because of change of sodium ions outside the cell
-It decreases rate of metabolism