Although both plasmolysis and de-plasmolysis occur in plant cells based on the amount of water inside their cell walls, they produce opposite reactions.
Plasmolysis occurs when a plant does not receive enough water, causing outward osmosis, or the movement of water out of the cell. Within the cell walls, the cytoplasm and plasma membrane shrink due the lack of water in the vacuole, causing them to pull away from the wall. Ultimately, this process causes the plant to shrink and wilt.
De-plasmolysis is the opposite of plasmolysis. When a plant takes on water, which is held in the vacuole, the cytoplasm and plasma swell within the cell wall. The pressure, which is caused by the influx of water, is called turgor pressure. As the pressure within the cell walls rises, the plant returns to its upright state.
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