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Question
Which of the following cells has the least turgor pressure (TP) value?
Which of the following cells has the least turgor pressure (TP) value?
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Solution
The correct option is A Flaccid cell
A cell which is kept in an isotonic solution such that the 𝚿w inside the cell is same as the 𝚿w outside the cell, there is no net movement of water. Such a cell is known as a flaccid cell.
A cell which is kept in a hypertonic solution such that the 𝚿w inside the cell is high as compared to the surrounding medium, water moves out of the cell into the surrounding medium by a process called exosmosis.
In case of plasmolysis, water moves out of a cell and the cell membrane of a plant cell moves away from its cell wall. Such a cell is known as plasmolysed cell.
A cell which is placed in a hypotonic solution such that the 𝚿w inside the cell is low as compared to the surrounding medium, water moves into the cell from the surrounding medium by a process called endosmosis.
Pressure exerted by the protoplast due to the entry of water into the cell, against the rigid cell wall is the turgor pressure (TP) and the cell is known as a turgid cell. It is responsible for the enlargement and extension growth of cells.
TP of a flaccid cell is less and that of a turgid cell is high. It is least in the case of a plasmolysed cell. In case of a burst cell, entry of water into the cell has caused the distension of the cell membrane beyond its capacity causing it to rupture. So the TP cannot be determined in case of a burst cell, but it is definitely more than that of a fully turgid cell.
A cell which is kept in an isotonic solution such that the 𝚿w inside the cell is same as the 𝚿w outside the cell, there is no net movement of water. Such a cell is known as a flaccid cell.
A cell which is kept in a hypertonic solution such that the 𝚿w inside the cell is high as compared to the surrounding medium, water moves out of the cell into the surrounding medium by a process called exosmosis.
In case of plasmolysis, water moves out of a cell and the cell membrane of a plant cell moves away from its cell wall. Such a cell is known as plasmolysed cell.
A cell which is placed in a hypotonic solution such that the 𝚿w inside the cell is low as compared to the surrounding medium, water moves into the cell from the surrounding medium by a process called endosmosis.
Pressure exerted by the protoplast due to the entry of water into the cell, against the rigid cell wall is the turgor pressure (TP) and the cell is known as a turgid cell. It is responsible for the enlargement and extension growth of cells.
TP of a flaccid cell is less and that of a turgid cell is high. It is least in the case of a plasmolysed cell. In case of a burst cell, entry of water into the cell has caused the distension of the cell membrane beyond its capacity causing it to rupture. So the TP cannot be determined in case of a burst cell, but it is definitely more than that of a fully turgid cell.
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