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Your search keyword '"Medlyn B.E."' showing total 2 results
Start Over Author "Medlyn B.E." Topic [sdv]life sciences [q-bio]
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1. Visual and hydraulic techniques produce similar estimates of cavitation resistance in woody species

Author

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, 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, and Peters, J.M.R.

Subjects
0106 biological sciences, 0301 basic medicine, Physiology, [SDV]Life Sciences [q-bio], Context (language use), Soil science, Plant Science, Stem, 01 natural sciences, 03 medical and health sciences, Xylem, Methods, Phylogeny, Cavitation, Resistance (ecology), Water, X-Ray Microtomography, 15. Life on land, Microcomputed tomography, Hydraulic, Wood, Droughts, 030104 developmental biology, [SDE]Environmental Sciences, Environmental science, Optical, 010606 plant biology & botany
Abstract

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

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2. Global variability in leaf respiration in relation to climate, plant functional types and leaf traits

Author

Shuang Xiang, Trofim C. Maximov, Lucy Rowland, Stephen Sitch, Keith J. Bloomfield, Emanuel Gloor, Christopher H. Lusk, Danielle Creek, Nicholas Mirotchnick, Ülo Niinemets, Michael G. Ryan, Peter B. Reich, Jon Lloyd, Fernando Valladares, Joana Zaragoza-Castells, Mary A. Heskel, John J. G. Egerton, Matthew H. Turnbull, Erik J. Veneklaas, John R. Evans, Roberta E. Martin, Jens Kattge, Françoise Yoko Ishida, Kevin L. Griffin, Gerhard Bönisch, Norma Salinas, Michael J. Liddell, Desmond Ng, Jeffrey S. Dukes, Martijn Slot, Hans Lambers, Lina M. Mercado, Pieter Poot, Mark C. Vanderwel, Kirk R. Wythers, Ian J. Wright, Nicholas G. Smith, Lasantha K. Weerasinghe, Rossella Guerrieri, Chris Huntingford, Jen Xiang, Teresa E. Gimeno, Yadvinder Malhi, Paul P. G. Gauthier, Patrick Meir, Eric G. Cosio, Odhran S. O'Sullivan, Gregory P. Asner, Mark G. Tjoelker, Damien Bonal, Lucas A. Cernusak, Graham D. Farquhar, Christian Wirth, Lourens Poorter, Matt Bradford, I. Colin Prentice, Oliver L. Phillips, Tomas F. Domingues, Belinda E. Medlyn, Nikolaos M. Fyllas, Owen K. Atkin, Kristine Y. Crous, Ayal P. Maksimov, Atkin O.K., Bloomfield K.J., Reich P.B., Tjoelker M.G., Asner G.P., Bonal D., Bonisch G., Bradford M.G., Cernusak L.A., Cosio E.G., Creek D., Crous K.Y., Domingues T.F., Dukes J.S., Egerton J.J.G., Evans J.R., Farquhar G.D., Fyllas N.M., Gauthier P.P.G., Gloor E., Gimeno T.E., Griffin K.L., Guerrieri R., Heskel M.A., Huntingford C., Ishida F.Y., Kattge J., Lambers H., Liddell M.J., Lloyd J., Lusk C.H., Martin R.E., Maksimov A.P., Maximov T.C., Malhi Y., Medlyn B.E., Meir P., Mercado L.M., Mirotchnick N., Ng D., Niinemets U., O'Sullivan O.S., Phillips O.L., Poorter L., Poot P., Prentice I.C., Salinas N., Rowland L.M., Ryan M.G., Sitch S., Slot M., Smith N.G., Turnbull M.H., Vanderwel M.C., Valladares F., Veneklaas E.J., Weerasinghe L.K., Wirth C., Wright I.J., Wythers K.R., Xiang J., Xiang S., Zaragoza-Castells J., Australian National University (ANU), Hawkesbury Institute for the Environment [Richmond] (HIE), Western Sydney University, University of Minnesota [Twin Cities] (UMN), University of Minnesota System, Carnegie Institution for Science [Washington], Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Max-Planck-Institut für Biogeochemie (MPI-BGC), CSIRO Land and Water, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), James Cook University (JCU), Pontificia Universidad Católica del Perú (PUCP), Universidade de São Paulo (USP), Purdue University [West Lafayette], National and Kapodistrian University of Athens (NKUA), Department of Geosciences [Princeton], Princeton University, School of Geography [Leeds], University of Leeds, Lamont-Doherty Earth Observatory (LDEO), Columbia University [New York], School of Geosciences [Edinburgh], University of Edinburgh, University of New Hampshire (UNH), Centre for Ecology and Hydrology [Wallingford] (CEH), Natural Environment Research Council (NERC), School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, The University of Western Australia (UWA), Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, UK, University of Waikato [Hamilton], Institute of Biological Problems of the Cryolithozone, Russian Academy of Sciences [Moscow] (RAS), School of Geography and the Environment [Oxford] (SoGE), University of Oxford [Oxford], Macquarie University, College of Life and Environmental Sciences, University of Exeter, Department of Ecology and Evolutionary Biology [University of Toronto] (EEB), University of Toronto, Wageningen University and Research [Wageningen] (WUR), School of Biological Sciences, University of Canterbury, Colorado State University [Fort Collins] (CSU), Department of Biology [Gainesville] (UF|Biology), University of Florida [Gainesville] (UF), Smithsonian Tropical Research Institute, University of Regina (UR), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), University of Peradeniya, Universität Leipzig [Leipzig], Chinese Academy of Sciences [Beijing] (CAS), Western Sydney University (UWS), University of Minnesota [Twin Cities], National and Kapodistrian University of Athens = University of Athens (NKUA | UoA), School of Geography and the Environment [Oxford], Estonian University of Life Sciences, Wageningen University and Research Centre [Wageningen] (WUR), Department of Biology (University of Florida), University of Florida [Gainesville], Smithsonian Tropical Research Institute, Panama City, Republic of Panama., Consejo Superior de Investigaciones Científicas [Spain] (CSIC), and AXA Research Fund

Subjects
temperature sensitivity, Physiology, [SDV]Life Sciences [q-bio], Acclimatization, Climate, Plant Science, Photosynthesis, Aridity, Temperatures, Ecology, Respiration, Temperature, Biosphere, Plants, PE&RC, Phenotype, nitrogen concentration, Leaf nitrogen (N), Plant Leave, Life Sciences & Biomedicine, Woody plant, terrestrial carbon-cycle, thermal-acclimation, Nitrogen, Plant Biology & Botany, Cell Respiration, Climate change, Biology, FOTOSSÍNTESE, Climate model, Ecology and Environment, tropical rain-forests, Carbon cycle, Climate models, Carbon Cycle, Photosynthesi, 07 Agricultural and Veterinary Sciences, Bosecologie en Bosbeheer, Plant functional types (PFTs), elevated atmospheric co2, photosynthetic capacity, Science & Technology, Plant Sciences, Tropics, scaling relationships, Plant, 15. Life on land, Herbaceous plant, 06 Biological Sciences, Carbon Dioxide, Models, Theoretical, vegetation models, Photosynthetic capacity, Arid, Forest Ecology and Forest Management, Plant Leaves, Biology and Microbiology, 13. Climate action, dark respiration, Acclimation
Abstract

Owen K. Atkin [et al.].- Received: 8 July 2014, Accepted: 29 November 2014, Leaf dark respiration (Rdark) is an important yet poorly quantified component of the global carbon cycle. Given this, we analyzed a new global database of Rdark and associated leaf traits., Data for 899 species were compiled from 100 sites (from the Arctic to the tropics). Several woody and nonwoody plant functional types (PFTs) were represented. Mixed-effects models were used to disentangle sources of variation in Rdark., Area-based Rdark at the prevailing average daily growth temperature (T) of each site increased only twofold from the Arctic to the tropics, despite a 20°C increase in growing T (8–28°C). By contrast, Rdark at a standard T (25°C, Rdark25) was threefold higher in the Arctic than in the tropics, and twofold higher at arid than at mesic sites. Species and PFTs at cold sites exhibited higher Rdark25 at a given photosynthetic capacity (Vcmax25) or leaf nitrogen concentration ([N]) than species at warmer sites. Rdark25 values at any given Vcmax25 or [N] were higher in herbs than in woody plants., The results highlight variation in Rdark among species and across global gradients in T and aridity. In addition to their ecological significance, the results provide a framework for improving representation of Rdark in terrestrial biosphere models (TBMs) and associated land-surface components of Earth system models (ESMs).

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