CHARRIER, Guillaume; BURLETT, Régis; GAMBETTA, Gregory; DELZON, Sylvain; DOMEC, Jean-Christophe; BEAUJARD, Francois

doi:10.21769/BioProtoc.2580

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CHARRIER, Guillaume
Biodiversité, Gènes & Communautés [BioGeCo]
Ecophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]

BURLETT, Régis
Biodiversité, Gènes & Communautés [BioGeCo]

GAMBETTA, Gregory

Ecophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]

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Article de revue

Ce document a été publié dans

Bio-Protocol. 2017, vol. 7, n° 20, p. 1-9

Résumé en anglais

Xylem sap circulates under either positive or negative hydraulic pressure in plants. Negative hydraulic pressure (i.e., tension) is the most common situation when transpiration is high, and several devices have been developed to quantify it accurately (e.g., Scholander pressure chamber, psychrometers). However, a proper measurement of positive xylem sap pressures may be critical when pressure is generated by the root system, allowing vessels to be refilled. Here, we describe two different methods to monitor positive xylem bulk pressure: the pressure gauge which can only be set onto a rootstock or a side branch and the point pressure sensor, which can allow measurements from a functioning plant without detopping or cutting.< Réduire

Mots clés

Xylème

Pression de seve

Psychromètre

Mots clés en anglais

Pressure

Tension

Water Status

Xylem Water Potential