Use of specific conductivity as criterion for estimation of aerial organ viability of grapevines in subzero temperatures

Specific conductivity is often used to determine plant freezing tolerance after a cold treatment. This study was undertaken to determine if there is a correlation between the evolution of aerial organs specific conductivity in vine (Vitis vinifera L.) and the extent of their viability with regard to the applied treatment. The data show two types of increases: the first one was observed along with the phenological evolution, in absence of any treatment, whereas the second appeared after the treatment on the organs. This increment was stronger at the bud than at the-shoot level. Electrolyte leakage from the frost treated organs seems to be linked with their sensitivity to cold or the intensity of the applied treatment.