Pressure-volume curves

In ecology, pressure-volume curves describe the relationship between total water potential (Ψt) and relative water content (R) of living organisms. These values are widely used in research on plant-water relations and provide valuable information on the turgor, osmotic and elastic properties of plant tissues.^[1][2][3][4]

According to the Boyle–v'ant Hoff Relation, the product of osmotic potential and volume of solution should be a constant for any given amount of osmotically active solutes in an ideal osmotic system.^[5][6][7]

${\displaystyle \psi _{0}{\mathit {(}}V)\!}$ = A constant

${\displaystyle \psi _{0}\!}$ is osmotic potential and ${\displaystyle {\mathit {(}}V)\!}$ is volume of solution.

This can then be manipulated to a linear relation which describes the ideal situation:

${\displaystyle \psi _{0}\!}$ = ${\displaystyle {\dfrac {1}{V}}\!\times }$ A constant