in plants, wht is the difference between dehydration and plasmolysis
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Plasmolysis is the process in which cells lose water in a hypertonic solution. The reverse process, deplasmolysis or cytolysis, can occur if the cell is in a hypotonic solution resulting in a lower external osmotic pressure and a net flow of water into the cell. Through observation of plasmolysis and deplasmolysis, it is possible to determine the tonicity of the cell's environment as well as the rate solute molecules cross the cellular membrane.
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Dehydration in plants
Once water is lost from the surface of the leaves they rapidly equilibrate (because the gradient is steep) to the water potential of the air, which is normally dry. If the plant can survive this event then it is considered dehydration tolerant.
Plasmolysis in plants
When a living plant cell loses water through osmosis, there is shrinkage or contraction of the contents of cell away from the cell wall. This is known as plasmolysis. Example - Shrinkage of vegetables in hypertonic conditions.
Once water is lost from the surface of the leaves they rapidly equilibrate (because the gradient is steep) to the water potential of the air, which is normally dry. If the plant can survive this event then it is considered dehydration tolerant.
Plasmolysis in plants
When a living plant cell loses water through osmosis, there is shrinkage or contraction of the contents of cell away from the cell wall. This is known as plasmolysis. Example - Shrinkage of vegetables in hypertonic conditions.
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