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<identifier>oai:HAL:hal-01032396v1</identifier>
<datestamp>2014-07-22</datestamp>
<setSpec>type:ART</setSpec>
<setSpec>subject:sdv</setSpec>
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<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>The wather relations of two tropical rainforest species (Virola surinamensis and Eperua falcata): is Virola unusual as previously reported?</title>
<creator>Barigah, Tete Severien</creator>
<creator>Aussenac, Gilbert</creator>
<creator>Baraloto, Christopher</creator>
<creator>Bonal, Damien</creator>
<creator>Cochard, Hervé</creator>
<creator>Granier, André</creator>
<creator>Guehl, Jean-Marc</creator>
<creator>Huc, Roland</creator>
<creator>Sobrado, Mari A.</creator>
<creator>Tyree, Melvin T.</creator>
<contributor>Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier (PIAF) ; Université Blaise Pascal - Clermont-Ferrand 2 (UBP) - Institut national de la recherche agronomique (INRA)</contributor>
<contributor>Ecologie et Ecophysiologie Forestières (EEF) ; Institut national de la recherche agronomique (INRA) - Université Henri Poincaré - Nancy I</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Université des Antilles et de la Guyane (UAG) - AgroParisTech - Institut national de la recherche agronomique (INRA) - Centre de coopération internationale en recherche agronomique pour le développement [CIRAD] - CNRS</contributor>
<contributor>Écologie fonctionnelle et physique de l'environnement (EPHYSE - UR1263) ; Institut national de la recherche agronomique (INRA)</contributor>
<contributor>Unité de Recherches Forestières Méditerranéennes (URFM) ; Institut national de la recherche agronomique (INRA)</contributor>
<description>HYDRO</description>
<source>Journal of Sigmoidal Plant Hydraulics</source>
<identifier>hal-01032396</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032396</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032396</source>
<source>Journal of Sigmoidal Plant Hydraulics, 2013, 19 p</source>
<language>en</language>
<subject lang=en>Conductivity apparatus</subject>
<subject lang=en>Hydraulic architecture</subject>
<subject lang=en>HPFM</subject>
<subject lang=en>Leaf water potential</subject>
<subject lang=en>Pressure chamber</subject>
<subject lang=en>Psychrometer</subject>
<subject>[SDV.BV] Life Sciences/Vegetal Biology</subject>
<type>Journal articles</type>
<description lang=en>The objective of this study was to examine the water relations and hydraulic architecture and vulnerability to cavitation in Virola surinamensis and V. michelii and to compare to similar measurements in Eperua falcata. In several previous reports Virola was seen to have a rather narrow range of xylem pressure potentials ( Yx) near zero in the course of a wet-season day while having water fluxes quite close to Eperua. We tested the hypothesis that the narrow range of Yx might be consistent with very high hydraulic conductivities of stems, roots and shoots and high vulnerability to cavitation in Virola compared to Eperua. When this hypothesis proved false we concluded that the previous determinations of Y x might be wrong in Virola due to latex. We re-examined the determination of Yx in Virola by the pressure chamber technique and compared results to determination of Yleaf by the thermocouple psychrometer technique and found that the likely range of Yx are more negative than previously reported. Problems concerning the determination of Yx in species with latex are discussed.</description>
<date>2013</date>
</dc>
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