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dc.contributor.author
Rada, Fermín
dc.contributor.author
García Núñez, Carlos
dc.contributor.author
Boero, Cecilia
dc.contributor.author
Gallardo, Miriam Rosa Angela
dc.contributor.author
Hilal, Mirna Beatriz
dc.contributor.author
González, Juan Antonio
dc.contributor.author
Prado, Fernando Eduardo
dc.contributor.author
Liberman Cruz, Máximo
dc.contributor.author
Azócar, Aura
dc.date.available
2019-07-04T18:23:45Z
dc.date.issued
2001-12
dc.identifier.citation
Rada, Fermín; García Núñez, Carlos; Boero, Cecilia; Gallardo, Miriam Rosa Angela; Hilal, Mirna Beatriz; et al.; Low-temperature resistance in Polylepis tarapacana, a tree growing at the highest altitudes in the world; Wiley Blackwell Publishing, Inc; Plant, Cell and Environment; 24; 3; 12-2001; 377-381
dc.identifier.issn
0140-7791
dc.identifier.uri
http://hdl.handle.net/11336/79155
dc.description.abstract
The Polylepis tarapacana forests found in Bolivia are unique with respect to their altitudinal distribution (4200-5200 m). Given the extreme environmental conditions that characterize these altitudes, this species has to rely on distinct mechanisms to survive stressful temperatures. The purpose of this study was to determine low-temperature resistance mechanisms in P. tarapacana. Tissue was sampled for carbohydrate and praline contents and micro-climatic measurements were made at two altitudes, 4300 and 4850 m, during both the dry cold and wet warm seasons. Supercooling capacity (-3 to -6 °C for the cold dry and -7 to -9 °C for the wet warm season) and injury temperatures (-18 to -23 °C for both seasons), determined in the laboratory, indicate that P. tarapacana is a frost-tolerant species. On the other hand, an increase in supercooling capacity, as the result of significant increase in total soluble sugar and praline contents, occurs during the wet warm season as a consequence of higher metabolic activity. Hence, P. tarapacana, a frost-tolerant species during the colder unfavourable season, is able to avoid freezing during the more favourable season when minimum night-time temperatures are not as extreme.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cold Resistance
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Freezing Avoidance
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Frost Tolerance
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Tree Line
dc.subject
Tropical Andes
dc.subject.classification
Ecología
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Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Low-temperature resistance in Polylepis tarapacana, a tree growing at the highest altitudes in the world
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-06-14T15:17:51Z
dc.journal.volume
24
dc.journal.number
3
dc.journal.pagination
377-381
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Rada, Fermín. Universidad de Los Andes; Venezuela
dc.description.fil
Fil: García Núñez, Carlos. Universidad de Los Andes; Venezuela
dc.description.fil
Fil: Boero, Cecilia. Fundación Miguel Lillo; Argentina
dc.description.fil
Fil: Gallardo, Miriam Rosa Angela. Fundación Miguel Lillo; Argentina
dc.description.fil
Fil: Hilal, Mirna Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
dc.description.fil
Fil: González, Juan Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Fundación Miguel Lillo; Argentina
dc.description.fil
Fil: Prado, Fernando Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
dc.description.fil
Fil: Liberman Cruz, Máximo. Universidad Mayor de San Andrés; Bolivia
dc.description.fil
Fil: Azócar, Aura. Universidad de Los Andes; Venezuela
dc.journal.title
Plant, Cell and Environment
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1046/j.1365-3040.2001.00685.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1046/j.1365-3040.2001.00685.x
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