Visual and hydraulic techniques produce similar estimates of cavitation resistance in woody species

Autor: Alice Gauthey, Sylvain Delzon, Ximeng Li, Celia M. Rodriguez-Dominguez, Madeline R Carins-Murphy, Andrew J. King, David T. Tissue, Timothy J. Brodribb, Jennifer M. R. Peters, Rosana López, Belinda E. Medlyn, Brendan Choat
Přispěvatelé: Hawkesbury Institute for the Environment [Richmond] (HIE), Western Sydney University, School of Biological Sciences [Hobart], University of Tasmania [Hobart, Australia] (UTAS), Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Biodiversité, Gènes & Communautés (BioGeCo), Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Universidad Politécnica de Madrid (UPM), Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant (PIAF), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Australian Research Council / DP170100761Australian Research Council / FT130101115International Synchrotron Access Program (ISAP) European Union's Horizon 2020 research and innovation program under the Marie Skodowska-Curie grant / 751918-AgroPHYS, European Commission, López, Rosana [0000-0003-3553-9148], Carins Murphy, Madeline R. [0000-0003-4370-9485], Rodríguez Domínguez, Celia M. [0000-0003-2352-0829], Delzon, Sylvain [0000-0003-3442-1711], Tissue, D.T. [0000-0002-8497-2047], Medlyn, B.E [0000-0001-5728-9827], Peters, J.M.R. [0000-0003-4627-7788], López, Rosana, Carins Murphy, Madeline R., Rodríguez Domínguez, Celia M., Delzon, Sylvain, Tissue, D.T., Medlyn, B.E, Peters, J.M.R.
Jazyk: angličtina
Předmět:
Zdroj: New Phytologist
New Phytologist, Wiley, In press, pp.1-14. ⟨10.1111/nph.16746⟩
New Phytologist, In press, pp.1-14. ⟨10.1111/nph.16746⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
ISSN: 1469-8137
0028-646X
DOI: 10.1111/nph.16746
Popis: 14 páginas.- 6 figuras.- referencias.- Additional Supporting Information may be found online in the Supporting Information section at the end of the article https://nph.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1111%2Fnph.16746&file=nph16746-sup-0001-SupInfo.pdf
Hydraulic failure of the plant vascular system is a principal cause of forest die-off under drought. Accurate quantification of this process is essential to our understanding of the physiological mechanisms underpinning plant mortality. Imaging techniques increasingly are applied to estimate xylem cavitation resistance. These techniques allow forin situmeasurement of embolism formation in real time, although the benefits and trade-offs associated with different techniques have not been evaluated in detail. Here we compare two imaging methods, microcomputed tomography (microCT) and optical vulnerability (OV), to standard hydraulic methods for measurement of cavitation resistance in seven woody species representing a diversity of major phylogenetic and xylem anatomical groups. Across the seven species, there was strong agreement between cavitation resistance values (P-50) estimated from visualization techniques (microCT and OV) and between visual techniques and hydraulic techniques. The results indicate that visual techniques provide accurate estimates of cavitation resistance and the degree to which xylem hydraulic function is impacted by embolism. Results are discussed in the context of trade-offs associated with each technique and possible causes of discrepancy between estimates of cavitation resistance provided by visual and hydraulic techniques.
This work was supported by an ARC Discovery Projec t(DP170100761) to BC and TJB and an ARC Future Fellowship (FT130101115) to BC. We thank Daniel Hausermann, ChrisHall and Anton Maksimenko from the Australian SynchrotronImaging and Medical Beamline in Melbourne for assisting withthe micro-computed tomography methodology, as well as thetechnical staff at SOLEIL. Travel funding for AG to attendbeamtime at SOLEIL was provided by the International Syn-chrotron Access Program (ISAP) managed by the Australian Syn-chrotron. CMR-D was supported by an Individual Fellowshipfrom the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agree-ment no. 751918-AgroPHYS
Databáze: OpenAIRE
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