Per citar aquest document: http://ddd.uab.cat/record/148662
Weak tradeoff between xylem safety and xylem-specific hydraulic efficiency across the world's woody plant species
Gleason, Sean M. (Macquarie University. Department of Biological Sciences)
Westoby, Mark (Macquarie University. Department of Biological Sciences)
Jansen, Steven (University of Ulm. Institute of Systematic Botany and Ecology)
Choat, Brendan (University of Western Sydney. Hawkesbury Institute for the Environment)
Hacke, Uwe G. (University of Alberta. Department of Renewable Resource)
Pratt, Robert B. (California State University, Bakersfield. Department of Biology)
Bhaskar, Radika (Haverford College. Department of Biology)
Brodribb, Tim J. (University of Tasmania. School of Biological Sciences)
Bucci, Sandra J. (Universidad Nacional de la Patagonia San Juan Bosco. Grupo de Estudios Biofısicos y Eco-fisiológicos)
Cao, Kun-Fang (Guangxi da xue. Plant Ecophysiology and Evolution Group)
Cochard, Hervé (Institut national de la recherche agronomique (França))
Delzon, Sylvain (Institut national de la recherche agronomique (França))
Domec, Jean-Christophe (Institut national de la recherche agronomique (França))
Fan, Ze-Xin (Chinese Academy of Sciences. Xishuangbanna Tropical Botanical Garden)
Feild, Taylor S. (James Cook University of North Queensland. School of Marine and Tropical Biology)
Jacobsen, Anna L. (California State University, Bakersfield. Department of Biology)
Johnson, Daniel M. (University of Idaho. Department of Forest, Rangeland and Fire Sciences)
Lens, Frederic (Rijksuniversiteit te Leiden. Naturalis Biodiversity Center)
Maherali, Hafiz (University of Guelph (Canadà). Department of Integrative Biology)
Martínez Vilalta, Jordi, 1975- (Centre de Recerca Ecològica i Aplicacions Forestals)
Mayr, Stefan (Universität Innsbruck. Institut für Botanik)
McCulloh, Katherine A. (University of Wisconsin-Madison. Department of Botany)
Mencuccini, Maurizio (University of Edinburgh. School ofGeoSciences)
Mitchell, Patrick J. (CSIRO (Australia). Land and Water)
Morris, Hugh (University of Ulm. Institute of Systematic Botany and Ecology)
Nardini, Andrea (Università degli studi di Trieste. Dipartimento Scienze della Vita)
Pittermann, Jarmila (University of California. Department of Ecology and Evolutionary Biology)
Plavcová, Lenka (University of Alberta. Department of Renewable Resource)
Schreiber, Stefan G. (University of Alberta. Department of Renewable Resource)
Sperry, John S. (University of Utah. Biology Department)
Wright, Ian J. (Macquarie University. Department of Biological Sciences)
Zanne, Amy E. (George Washington University. Department of Biological Sciences)

Data: 2016
Resum: The evolution of lignified xylem allowed for the efficient transport of water under tension, but also exposed the vascular network to the risk of gas emboli and the spread of gas between xylem conduits, thus impeding sap transport to the leaves. A well-known hypothesis proposes that the safety of xylem (its ability to resist embolism formation and spread) should trade off against xylem efficiency (its capacity to transport water). We tested this safety–efficiency hypothesis in branch xylem across 335 angiosperm and 89 gymnosperm species. Safety was considered at three levels: the xylem water potentials where 12%, 50% and 88% of maximal conductivity are lost. Although correlations between safety and efficiency were weak (r2 < 0. 086), no species had high efficiency and high safety, supporting the idea for a safety–efficiency tradeoff. However, many species had low efficiency and low safety. Species with low efficiency and low safety were weakly associated (r2 < 0. 02 in most cases) with higher wood density, lower leaf- to sapwood-area and shorter stature. There appears to be no persuasive explanation for the considerable number of species with both low efficiency and low safety. These species represent a real challenge for understanding the evolution of xylem.
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; acceptedVersion
Matèria: Cavitation ; Embolism ; Hydraulic conductivity ; Mean annual precipitation ; Mean annual temperature ; Xylem
Publicat a: New phytologist, Vol. 209, Issue 1 (Jan. 2016) , p. 123-136, ISSN 0028-646X

DOI: 10.1111/nph.13646


Disponible a partir de: 2017-01-31
Article. Post-print

Disponible a partir de: 2017-01-31
Material addicional. Post-print

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2016-04-11, darrera modificació el 2016-06-09



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