potentiel osmotique

CONT: Potentiel osmotique (psi[indice os]). Ce potentiel résulte de la présence de molécule dissoute dans l'eau. L'état de référence étant l'eau pure, ce potentiel sera toujours [plus petit que ou égal à] 0.
CONT: Pour les organes végétaux (vivants ou récoltés), le potentiel hydrique [...] se réduit pratiquement à deux composantes qui peuvent être mesurés séparément : le potentiel hydrostatique P et le potentiel osmotique [...]

CONT: ... solute potential. The tendency for water to undergo phase changes or to pass through membranes is controlled by the presence of solutes in the water. This is important in soil for two reasons: (1) evaporation of soil water is an important phase change, (2) water flow from soil into cells of organisms, including plant roots, requires transport through membranes. ... As with matric potential, solute potential is never positive; it can be negative for impure water, or approximately zero for very pure water. Solute potential is also called osmotic potential, because the process of passing selectively through a semi-permeable membrane is called osmosis.
OBS: The symbols used is the Greek letter Psi sub Pi for osmotic potential ...