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An alternative method for analysing pressure‐volume curves produced with the pressure chamber
Author(s) -
SINCLAIR R.,
VENABLES W. N.
Publication year - 1983
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/1365-3040.ep11587627
Subject(s) - turgor pressure , volume (thermodynamics) , osmotic pressure , elasticity (physics) , thermodynamics , mechanics , curve fitting , isobaric process , chemistry , materials science , mathematics , botany , physics , statistics , biology , biochemistry
. An equation is derived relating tissue water potential to relative water content. This equation may be used to lit a single curve to a set of data such as the standard pressure volume measurements made with a pressure chamber. From such a single curve fitting operation, estimates of the parameters involved may be found, and this allows calculation of such quantities as bulk modulus of elasticity, osmotic potential at full turgor and at the turgor loss point, pressure potential, and the weight of symplastic water. The method of analysis has several advantages, which are illustrated using pressure chamber data obtained from leaves of Lombardy poplar, Populus nigra L. ‘italica’.