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dc.contributor.author
Meinzer, Frederick C.
dc.contributor.author
Woodruff, David R.
dc.contributor.author
Domec, Jean-Christophe
dc.contributor.author
Goldstein, Guillermo Hernan
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Campanello, Paula Inés
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Gatti, Maria Genoveva
dc.contributor.author
Villalobos-Vega, Randol
dc.date.available
2018-09-26T22:06:00Z
dc.date.issued
2008-05
dc.identifier.citation
Meinzer, Frederick C.; Woodruff, David R.; Domec, Jean-Christophe; Goldstein, Guillermo Hernan; Campanello, Paula Inés; et al.; Coordination of leaf and stem water transport properties in tropical forest trees; Springer; Oecologia; 156; 1; 5-2008; 31-41
dc.identifier.issn
0029-8549
dc.identifier.uri
http://hdl.handle.net/11336/61014
dc.description.abstract
Stomatal regulation of transpiration constrains leaf water potential (ΨL) within species-specific ranges that presumably avoid excessive tension and embolism in the stem xylem upstream. However, the hydraulic resistance of leaves can be highly variable over short time scales, uncoupling tension in the xylem of leaves from that in the stems to which they are attached. We evaluated a suite of leaf and stem functional traits governing water relations in individuals of 11 lowland tropical forest tree species to determine the manner in which the traits were coordinated with stem xylem vulnerability to embolism. Stomatal regulation of ΨL was associated with minimum values of water potential in branches (Ψbr) whose functional significance was similar across species. Minimum values of Ψbr coincided with the bulk sapwood tissue osmotic potential at zero turgor derived from pressure-volume curves and with the transition from a linear to exponential increase in xylem embolism with increasing sapwood water deficits. Branch xylem pressure corresponding to 50% loss of hydraulic conductivity (P 50) declined linearly with daily minimum Ψbr in a manner that caused the difference between Ψbr and P 50 to increase from 0.4 MPa in the species with the least negative Ψbr to 1.2 MPa in the species with the most negative Ψbr. Both branch P 50 and minimum Ψbr increased linearly with sapwood capacitance (C) such that the difference between Ψbr and P 50, an estimate of the safety margin for avoiding runaway embolism, decreased with increasing sapwood C. The results implied a trade-off between maximizing water transport and minimizing the risk of xylem embolism, suggesting a prominent role for the buffering effect of C in preserving the integrity of xylem water transport. At the whole-tree level, discharge and recharge of internal C appeared to generate variations in apparent leaf-specific conductance to which stomata respond dynamically.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Capacitance
dc.subject
Stomata
dc.subject
Transpiration
dc.subject
Turgor
dc.subject
Xylem Vulnerability
dc.subject.classification
Ecología
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Coordination of leaf and stem water transport properties in tropical forest trees
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-09-18T14:07:05Z
dc.journal.volume
156
dc.journal.number
1
dc.journal.pagination
31-41
dc.journal.pais
Alemania
dc.description.fil
Fil: Meinzer, Frederick C.. United States Department of Agriculture; Argentina
dc.description.fil
Fil: Woodruff, David R.. United States Department of Agriculture; Argentina
dc.description.fil
Fil: Domec, Jean-Christophe. North Carolina State University; Estados Unidos
dc.description.fil
Fil: Goldstein, Guillermo Hernan. University of Miami; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina
dc.description.fil
Fil: Campanello, Paula Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Universidad Nacional de Misiones. Instituto de Biología Subtropical; Argentina. Universidad de Buenos Aires; Argentina
dc.description.fil
Fil: Gatti, Maria Genoveva. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Universidad Nacional de Misiones. Instituto de Biología Subtropical; Argentina. Universidad de Buenos Aires; Argentina
dc.description.fil
Fil: Villalobos-Vega, Randol. University of Miami; Estados Unidos
dc.journal.title
Oecologia
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00442-008-0974-5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs00442-008-0974-5


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