I saw in the paper from Nguyen-Queyrens et al. (2002) that osmotic potential = ( osmotic potential at full turgor × 100) / Relative Water Content, but it does not seem correct to just to calculate osmotic potential at full turgor, as (Osmotic Potential × relative water content ) /100. The resulting values are not reliable.
This is not surprising because it is nearly ridiculous to compute some pressure without knowing what is the conjugate variable, i.e., volume for the question being asked. Plant people never do! The question is ...what do you want to do with that potential? It will be either growth or yield. The following papers available on researchgate in my name will give the why and whynots and do's and don'ts. If you still have a problem, don't hesitate to get in touch with me ([email protected]). We have the methodology and even the software with open access. More advanced physicochemical papers are being omitted as you may not need them.
V. Sitaramam, and N.M.Rao, Osmotolerance in plants: Respiration matches the ecological preference Physiol. Mol.Biol.Plants 12: 229-240, 2006.
Sitaramam, V., N.M.Rao, and R.Bhate Osmotolerance in plants: Phenotyping for osmotolerance in cultivars with differential requirement for water. Physiol. Mol.Biol.Plants 13: 115-126, 2007.
V.Sitaramam and V.Atre Osmotolerance varies during the life cycle of Arabidopsis. Physiol. Mol.Biol.Plants 13: 127-136, 2007.
V. Sitaramam,, Pachapurkar S. and Gokhale The alternative oxidase mediated respiration contributes to growth, resistance to hyperosmotic media and accumulation of secondary metabolites in three species., T. Physiol. Mol. Biol. Plants, 14, 235-251, 2008
Sitaramam, V.; Bhate, R.; Kamalraj, P. Respiration hastens maturation and lowers yield in rice. Physiol. Mol. Biol. Plants (2008) 14: 253-271.
Sitaramam, V. Common fallacies in plant physiology in understanding osmotolerance: new methodology to define the phenotype Physiol. Mol.Biol.Plants 12: 1-17, 2006
The energetic basis of osmotolerance in plants: physical principles. V Sitaramam and CN Madhavarao. J. Theor. Biol. 189, 333-352, 1997.
Stretch sensitivity of transmembrane mobility of hydrogen peroxide through voids in the bilayer: role of cardiolipin. J.C.Mathai and V. Sitaramam J. Biol. Chem. 269,17784-17793, 1994.
Rate limiting step in electron transport: osmotically sensitive diffusion of quinones through voids in the bilayer. J.C. Mathai, Z.E. Sauna, O. John and V. Sitaramam. J. Biol. Chem., 268, 15442-15454, 1993.
Influence of osmolality of the medium on photosynthetic electron transport proton fluxes and photophosphorylation in isolated thylakoids. Run-sun Pan, Sauna,Z., Dilley,R.A. and V.Sitaramam, Ind. J. Biochem.Biophy. 32,1-10,1995.
Dear Sir,
You can find answer for your question in the following attached file.
Dear Dr. Buckley,
I only measured osmotic potential and relative water content.
Dear Dr. Yin Wen.
Thanks for the paper. Best regards,
Manuel Esperón
Dear Sir,
See next link:
https://cran.r-project.org/web/packages/pvldcurve/vignettes/pvldcurve.html
https://github.com/gevargu/Plant_Ecophysiology_Tools/blob/master/Pressure%20Volume%20Curves/pvc_trial.md
Good luck,