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dc.contributor.author
Zhang, Yong Jiang
dc.contributor.author
Bucci, Sandra Janet
dc.contributor.author
Arias, Nadia Soledad
dc.contributor.author
Scholz, Fabian Gustavo
dc.contributor.author
Hao, Guang You
dc.contributor.author
Cao, Kun Fang
dc.contributor.author
Goldstein, Guillermo Hernan
dc.date.available
2018-05-24T14:40:44Z
dc.date.issued
2016-03
dc.identifier.citation
Zhang, Yong Jiang; Bucci, Sandra Janet; Arias, Nadia Soledad; Scholz, Fabian Gustavo; Hao, Guang You; et al.; Freezing resistance in Patagonian woody shrubs: the role of cell wall elasticity and stem vessel size; Oxford University Press; Tree Physiology; 36; 8; 3-2016; 1007-1018
dc.identifier.issn
0829-318X
dc.identifier.uri
http://hdl.handle.net/11336/46053
dc.description.abstract
Freezing resistance through avoidance or tolerance of extracellular ice nucleation is important for plant survival in habitats with frequent subzero temperatures. However, the role of cell walls in leaf freezing resistance and the coordination between leaf and stem physiological processes under subzero temperatures are not well understood. We studied leaf and stem responses to freezing temperatures, leaf and stem supercooling, leaf bulk elastic modulus and stem xylem vessel size of six Patagonian shrub species from two sites (plateau and low elevation sites) with different elevation and minimum temperatures. Ice seeding was initiated in the stem and quickly spread to leaves, but two species from the plateau site had barriers against rapid spread of ice. Shrubs with xylem vessels smaller in diameter had greater stem supercooling capacity, i.e., ice nucleated at lower subzero temperatures. Only one species with the lowest ice nucleation temperature among all species studied exhibited freezing avoidance by substantial supercooling, while the rest were able to tolerate extracellular freezing from −11.3 to −20 °C. Leaves of species with more rigid cell walls (higher bulk elastic modulus) could survive freezing to lower subzero temperatures, suggesting that rigid cell walls potentially reduce the degree of physical injury to cell membranes during the extracellular freezing and/or thaw processes. In conclusion, our results reveal the temporal–spatial ice spreading pattern (from stem to leaves) in Patagonian shrubs, and indicate the role of xylem vessel size in determining supercooling capacity and the role of cell wall elasticity in determining leaf tolerance of extracellular ice formation.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Oxford University Press
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Bulk Elastic Modulus
dc.subject
Patagonian Steppe
dc.subject
Leaf Lethal Temperature
dc.subject
Supercooling
dc.subject.classification
Otras Ciencias Biológicas
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Freezing resistance in Patagonian woody shrubs: the role of cell wall elasticity and stem vessel size
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-05-04T21:32:47Z
dc.identifier.eissn
1758-4469
dc.journal.volume
36
dc.journal.number
8
dc.journal.pagination
1007-1018
dc.journal.pais
Reino Unido
dc.journal.ciudad
Oxford
dc.description.fil
Fil: Zhang, Yong Jiang. Chinese Academy of Sciences; República de China. Harvard University; Estados Unidos
dc.description.fil
Fil: Bucci, Sandra Janet. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia ; Argentina
dc.description.fil
Fil: Arias, Nadia Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia ; Argentina
dc.description.fil
Fil: Scholz, Fabian Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia ; Argentina
dc.description.fil
Fil: Hao, Guang You. Chinese Academy of Sciences; República de China
dc.description.fil
Fil: Cao, Kun Fang. Guangxi University; China
dc.description.fil
Fil: Goldstein, Guillermo Hernan. University of Miami; Estados Unidos. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Tree Physiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/treephys/tpw036
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/treephys/article/36/8/1007/2515579


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