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Abstract
Primary growth affects plant plasticity by influencing the number, spatial arrangement and time of differentiation of the leaves. For Nothofagus obliqua, we evaluated if primary shoot growth dynamics determines short-term responses to environmental conditions, and intra-individual variations in such responses. Before bud-break, saplings were located in experimental conditions, combining two light treatments with two water supply treatments. For each [ver mas...]
dc.contributor.authorTorres, Cristian Daniel
dc.contributor.authorMagnin, Amaru
dc.contributor.authorVarela, Santiago Agustin
dc.contributor.authorStecconi, Marina
dc.contributor.authorGrosfeld, Javier Edgardo
dc.contributor.authorPuntieri, Javier G.
dc.date.accessioned2019-01-04T12:42:11Z
dc.date.available2019-01-04T12:42:11Z
dc.date.issued2018-10
dc.identifier.issn1432-2285
dc.identifier.otherhttps://doi.org/10.1007/s00468-018-1712-1
dc.identifier.urihttp://hdl.handle.net/20.500.12123/4210
dc.identifier.urihttps://link.springer.com/article/10.1007/s00468-018-1712-1
dc.description.abstractPrimary growth affects plant plasticity by influencing the number, spatial arrangement and time of differentiation of the leaves. For Nothofagus obliqua, we evaluated if primary shoot growth dynamics determines short-term responses to environmental conditions, and intra-individual variations in such responses. Before bud-break, saplings were located in experimental conditions, combining two light treatments with two water supply treatments. For each individual, morphology, relative extension rate (RER), and relative leaf chlorophyll content (SPAD units) were registered for the annual shoot derived from the most distal bud of two axis categories: the main axis (trunk) and a main branch. For trunk shoots, we analysed the net photosynthetic rate at saturating photosynthetic photon flux density (Psat) of proximal and distal leaves. Shaded trees had higher RER, longer and more slender shoots, longer internodes, and higher leaf chlorophyll content than unshaded trees. The number of nodes was affected by water condition in trunk shoots, and by light condition in main branch shoots. Full sunlight stimulated the development of a branch following the length and growth direction of its parent shoot (relay branch). Shade would have promoted the development of neoformed leaves. Under shade and low water availability, water use efficiency was higher in distal than proximal leaves. Under high sunlight and water availability, leaves of relay branches presented slightly higher Psat with higher water loss than both proximal preformed leaves and distal leaves under the other tested conditions. This study highlights the need of assessing intra-individual variations in shoot acclimation in relation to axis differentiation.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherSpringer Naturees_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceTrees. Structure and Function 32 (5) : 1301–1314 (Octubre 2018)es_AR
dc.subjectNothofaguses_AR
dc.subjectPlasticidades_AR
dc.subjectPlasticityeng
dc.subjectLuz
dc.subjectLighteng
dc.subjectFactores Ambientales
dc.subjectEnvironmental Factorseng
dc.subject.otherNothofagus obliquaes_AR
dc.titleMorpho-physiological responses of Nothofagus obliqua to light intensity and water status, with focus on primary growth dynamicses_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEstación Experimental Agropecuaria Bariloche. Área Forestal. Grupo de Ecología Forestales_AR
dc.description.filFil: Torres, Cristian Daniel. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentinaes_AR
dc.description.filFil: Magnin, Amaru. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentinaes_AR
dc.description.filFil: Varela, Santiago Agustín. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Barilohe. Área Forestal. Grupo de Ecología Forestal; Argentinaes_AR
dc.description.filFil: Stecconi, Marina. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentinaes_AR
dc.description.filFil: Grosfeld, Javier Edgardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico y Tecnológico Patagonia Norte; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentinaes_AR
dc.description.filFil: Puntieri, Javier G. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico y Tecnológico Patagonia Norte; Argentinaes_AR
dc.subtypecientifico


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