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dc.contributor.author
Arias, Nadia Soledad
dc.contributor.author
Scholz, Fabian Gustavo
dc.contributor.author
Goldstein, Guillermo Hernan
dc.contributor.author
Bucci, Sandra Janet
dc.date.available
2018-07-27T19:15:14Z
dc.date.issued
2017-06
dc.identifier.citation
Arias, Nadia Soledad; Scholz, Fabian Gustavo; Goldstein, Guillermo Hernan; Bucci, Sandra Janet; The cost of avoiding freezing in stems: Trade-off between xylem resistance to cavitation and supercooling capacity in woody plants; Oxford University Press; Tree Physiology; 37; 9; 6-2017; 1251-1262
dc.identifier.issn
0829-318X
dc.identifier.uri
http://hdl.handle.net/11336/53340
dc.description.abstract
Stems and leaves of Olea europaea L. (olive) avoid freezing damage by substantial supercooling during the winter season. Physiological changes during acclimation to low temperatures were studied in five olive cultivars. Water relations and hydraulic traits, ice nucleation temperature (INT) and temperatures resulting in 50% damage (LT50) were determined. All cultivars showed a gradual decrease in INT and LT50 from the dry and warm summer to the wet and cold winter in Patagonia, Argentina. During acclimation to low temperatures there was an increase in leaf cell wall rigidity and stomatal conductance (gs), as well as a decrease in leaf apoplastic water content, leaf water potential (?), sap flow and stem hydraulic conductivity (ks). More negative ? as a consequence of high gs and detrimental effects of low temperatures on root activity resulted in a substantial loss of ks due to embolism formation. Seasonal stem INT decrease from summer to winter was directly related to the xylem resistance to cavitation, determined by the loss of ks across cultivars. Thus the loss of freezable water in xylem vessels by embolisms increased stem supercooling capacity and delayed ice propagation from stems to the leaves. For the first time, a trade-off between xylem resistance to cavitation and stem and leaf supercooling capacity was observed in plants that avoid extracellular freezing by permanent supercooling. The substantial loss of hydraulic function in olive cultivar stems by embolism formation with their high repair costs are compensated by avoiding plant damage at very low subzero temperatures.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Oxford University Press
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cold Acclimation
dc.subject
Hydraulic Conductivity
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Ice Nucleation Temperature
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Olea Europaea
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Sap Flow
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Stomatal Conductance
dc.subject.classification
Otras Ciencias Biológicas
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
The cost of avoiding freezing in stems: Trade-off between xylem resistance to cavitation and supercooling capacity in woody plants
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-23T17:24:07Z
dc.journal.volume
37
dc.journal.number
9
dc.journal.pagination
1251-1262
dc.journal.pais
Reino Unido
dc.journal.ciudad
Oxford
dc.description.fil
Fil: Arias, Nadia Soledad. Universidad Nacional de la Patagonia "San Juan Bosco". Instituto de Biociencias de la Patagonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biociencias de la Patagonia; Argentina
dc.description.fil
Fil: Scholz, Fabian Gustavo. Universidad Nacional de la Patagonia "San Juan Bosco". Instituto de Biociencias de la Patagonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biociencias de la Patagonia; Argentina
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: Bucci, Sandra Janet. Universidad Nacional de la Patagonia "San Juan Bosco". Instituto de Biociencias de la Patagonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biociencias de la Patagonia; Argentina
dc.journal.title
Tree Physiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/treephys/tpx071
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/treephys/article-abstract/37/9/1251/3867967
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