Determination of relationship between water potential and water saturation deficit in leaf tissue

Pospíšilová J.
BIOLOGIA PLANTARUM 11: 202-207, 1969

Keywords: WSD, water potential
Abstract: Abstraet. The mutual relationship between the water potential and water saturation deficit (w.s.d.) was studied on samples of leaf tissue of fodder cabage. Definite values of water potential were obtained by long-term exposure of plant material to an atmosphere with definite constant pressure of water vapour. The resulting w.s.d, values were determined gravimotrioally. Water saturation deficit varies indirectly with the water potential. This dependence was linear for values of water potential from --4.4 to --43.9 arm. Since the stabilization of equilibrum of water potential between the loaf tissue and surrounding atmosphere was very slow the relationship between water potential and w.s.d, was influenced by the size of samples and by the length of exposure. Therefore this method was more suitable for relative than for absolute measurement.
DOI: 10.1007/BF02920798
IEB authors: Jana Pospíšilová