The solute potential of a plant cell is -17 bar and its pressure potential is 5 bar. The plant cell is placed in a solution with a water potential of -12 bar. Determine the water potential and the flow of water.

-22 bar; water will move out of the cell

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-12 bar; water will move into the cell

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-22 bar; water will move into the cell

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-12 bar; there will be no net movement of water

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Solution

The correct option is D -12 bar; there will be no net movement of water
Water potential = Solute potential + Pressure potential

The water potential of the plant cell which is mentioned in this question is -12 bar (-17 + 5 = -12).

The plant cell is placed in a solution of water potential, -12 bar.

Water moves from a region of higher water potential to lower water potential.

The water potential is found to be same in both the plant cell as well as the solution in which it is placed, hence, there will be no net movement of water.

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