Water potential a) The value for Ψ in root tissue was found to be -3.3 bars.  If you take the root tissue and place it in a 0.1 M solution of sucrose at 20°C in an open beaker, what is the Ψ of the solution, and in which direction would the net flow of water be?

Biology 2e
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ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter30: Plant Form And Physiology
Section: Chapter Questions
Problem 39CTQ: The process of bulk flow transports fluids in a plant. Describe the two main bulk flow processes.
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Water potential

a) The value for Ψ in root tissue was found to be -3.3 bars.  If you take the root tissue and place it in a 0.1 M solution of sucrose at 20°C in an open beaker, what is the Ψ of the solution, and in which direction would the net flow of water be?

b) NaCl dissociates into 2 particles in water: Na+ and Cl-. If the solution in question 4 contained 0.1M NaCl instead of 0.1M sucrose, what is the Ψ of the solution, and in which direction would the net flow of water be?

c) A plant cell with a Ψs of -7.5 bars keeps a constant volume when immersed in an open-beaker solution that has a Ψs of -4 bars.  What is the cell’s ΨP?

Expert Solution
Step 1

WATER POTENTIAL

The measure of the potential of the  water to do work is called as Water Potential.

Now, this must be kept in mind that water always moves from an area of higher water potential to
an area of lower water potential.

 

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