Utilisation de la conductivité spécifique comme critère d'estimation de la viabilité au niveau de l'appareil aérien des vignes champenoises soumises aux températures négatives

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Abstract
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. Keywords: electrical conductivity, phenological stage, thermal stress, 2,3,5-triphenyltetrazolium chloride, Vitis vinifera L. [Journal translation]

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