Pressure Potential
Compute the pressure (turgor) potential in megapascals as the total water potential minus the osmotic potential; both inputs are signed.
Description
Compute the pressure (turgor) potential in megapascals as the total water potential minus the osmotic potential; both inputs are signed.
Pressure Potential is a focused biology tool that compute the pressure (turgor) potential in megapascals as the total water potential minus the osmotic potential; both inputs are signed. It calculates locally from the values you enter and exposes the result without changing the source observations.1
When to use Pressure Potential
Use Pressure Potential when you need to compute the pressure (turgor) potential in megapascals as the total water potential minus the osmotic potential; both inputs are signed. Enter Total water potential and Osmotic potential using the definitions and units below so the result can be reproduced.
- Total water potential
- Total water potential in megapascals.
- Osmotic potential
- Osmotic potential in megapascals.
How Pressure Potential calculates the result
The published tool contract uses this rule: Compute the pressure (turgor) potential in megapascals as the total water potential minus the osmotic potential; both inputs are signed.1
- Pressure potential
- Pressure potential in megapascals; signed and typically positive in turgid cells.
Limitations of Pressure Potential
The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability.
Alternative or Complementary measurements
Retain the original Total water potential and Osmotic potential values and their units alongside the result. Turgor Pressure Estimate is useful when you instead need to estimate turgor pressure in megapascals as the total water potential minus the osmotic potential, floored at zero when the cell is flaccid; both potentials are signed and finite. Total Water Potential provides another view by helping you compute the total water potential in megapascals as the sum of the osmotic, pressure, and matric potentials; the matric potential defaults to zero and all inputs are signed.
References
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Water potential — Wikipedia contributors
Similar or alternative tools
- Turgor Pressure Estimate
Estimate turgor pressure in megapascals as the total water potential minus the osmotic potential, floored at zero when the cell is flaccid; both potentials are signed and finite.
- Total Water Potential
Compute the total water potential in megapascals as the sum of the osmotic, pressure, and matric potentials; the matric potential defaults to zero and all inputs are signed.
- Leaf VPD From RH
Compute the leaf vapour pressure deficit in kilopascals from leaf temperature using the Tetens equation for saturation vapour pressure, 0.6108 times e^(17.27 times temperature divided by temperature plus 237.3), scaled by one minus relative humidity over one hundred.