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<title lang=en>The water relations of two tropical rainforest species (Virola surinamensis and Eperua falcata): Is Virola unusual as previously reported?</title>
<creator>Barigah, TS</creator>
<creator>Aussenac, G</creator>
<creator>Baraloto, C</creator>
<creator>Bonal, D</creator>
<creator>Cochard, Hervé, </creator>
<creator>Granier, Agnès, </creator>
<creator>Guehl, JM</creator>
<creator>Huc, R</creator>
<creator>Sobrado, MA</creator>
<creator>Tyree, MT</creator>
<contributor>Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier (PIAF) ; Institut National de la Recherche Agronomique (INRA) - Université Blaise Pascal - Clermont-Ferrand 2 (UBP)</contributor>
<contributor>Ecologie et Ecophysiologie Forestières (EEF) ; Institut National de la Recherche Agronomique (INRA) - Université de Lorraine (UL)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Unité de Recherches Forestières Méditerranéennes (URFM) ; Institut National de la Recherche Agronomique (INRA)</contributor>
<description>International audience</description>
<source>ISSN: 2268-4565</source>
<source>Journal of Plant Hydraulics</source>
<publisher>INRA Editions</publisher>
<identifier>hal-01077475</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01077475</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01077475/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01077475/file/JPH-1-e0002.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01077475</source>
<source>Journal of Plant Hydraulics, INRA Editions, 2014, 1, pp.e0002. 〈http://www6.inra.fr/jph/Articles/2014/JPH-1-e0002〉</source>
<source>http://www6.inra.fr/jph/Articles/2014/JPH-1-e0002</source>
<language>en</language>
<subject lang=en>Conductivity apparatus, Hydraulic architecture, HPFM, Leaf water potential, Pressure chamber, Psychrometer</subject>
<subject>[SDV.BV] Life Sciences [q-bio]/Vegetal Biology</subject>
<type>info:eu-repo/semantics/article</type>
<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 (Ψx) 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 Ψx 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 Ψx might be wrong in Virola due to latex. We re-examined the determination of Ψx in Virola by the pressure chamber technique and compared results to determination of Ψleaf by the thermocouple psychrometer technique and found that the likely range of Ψx are more negative than previously reported. Problems concerning the determination of Ψx in species with latex are discussed.</description>
<date>2014</date>
</dc>
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