Water potential Water potential = solute potential + pressure potential.

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Presentation transcript:

Water potential Water potential = solute potential + pressure potential

Pressure potential A force that resists water flow due to a container (cell) being full and not wanting to expand any more. Cell walls of plant cells are important in this regard.

Solute potential Solute potential = - i M R T i = the number of pieces the solute breaks into in the water R = a constant (.0821) T = temperature M = concentration of the solution NOTE: The negative is important

Negative As solute potential is more negative with increased solute concentration, the water will move from high to low water potential. A high concentration of solute leads to a more negative (lower) water potential.

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