Cross-validation on saplings of High-Capacity Tensiometer and Thermocouple Psychrometer for continuous monitoring of xylem water potential
| Autor: | Dainese, Roberta, Lima Lopes, Bruna de Carvalho Faria, Tedeschi, Giuseppe, Lamarque, Laurent, Delzon, Sylvain, Fourcaud, Thierry, Tarantino, Alessandro |
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| Přispěvatelé: | University of Strathclyde [Glasgow], Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Politecnico di Bari, Biodiversité, Gènes & Communautés (BioGeCo), Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Water status monitoring
Pressure Chamber Xylème Xylem water potential F60 - Physiologie et biochimie végétale [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics High-Capacity Tensiometer [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy K10 - Production forestière Physiologie végétale Potentiel hydrique [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems psychromètre [SDE.BE]Environmental Sciences/Biodiversity and Ecology Potentiel xylème eau Thermocouple Psychrometer Water tension |
| Zdroj: | Journal of Experimental Botany Journal of Experimental Botany, Oxford University Press (OUP), 2021, ⟨10.1093/jxb/erab412⟩ Journal of Experimental Botany, Oxford University Press (OUP), 2022, 73 (1), pp.400-412. ⟨10.1093/jxb/erab412⟩ |
| ISSN: | 0022-0957 1460-2431 |
| DOI: | 10.1093/jxb/erab412⟩ |
| Popis: | International audience; Abstract The Pressure Chamber, the most popular method used to measure xylem water potential, is a discontinuous and destructive technique and therefore not suitable for automated monitoring. Continuous non-destructive monitoring could only be achieved until very recently via the Thermocouple Psychrometer (TP). We here present the High-Capacity Tensiometer (HCT) as alternative method for continuous non-destructive monitoring. This provided us with a unique chance to cross-validate the two instruments by installing them simultaneously on the same sapling stem. The HCT and the TP showed excellent agreement for xylem water potential < -0.5 MPa. Response to day/night cycles and watering was remarkably in phase, indicating excellent response time of both instruments despite substantially different working principles. For xylem water potential > -0.5 MPa, the discrepancies sometimes observed between the HCT and TP were mainly attributed to the kaolin paste used to establish contact between the xylem and the HCT, which becomes hydraulically poorly conductive in this range of water potential once dried beyond its air-entry value and subsequently re-wetted. Notwithstanding this limitation, which can be overcome by selecting a clay paste with higher air-entry value, the HCT has been shown to represent a valid alternative to the TP. |
| Databáze: | OpenAIRE |
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