First slide

Plant-Water Relations

Question

Water potential is:

Easy

A

Always equal to solute potential
B

Equal to pressure potential minus solute potential
C

Always equal to osmotic potential
D

A tendency of a solution to take up water from another solution across a membrane

Solution

Water potential ( $ψ_{w}$ ) is a concept fundamental to understanding water movement. Solute potential ( $ψ_{s}$ ) and pressure potential ( $ψ_{p}$ ) are the two main components that determine water potential.
$ψ_{w}$ = $ψ_{s}$ + $ψ_{p}$ .

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