Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst.

Nothofagus antarctica (G. Forster) Oerst. (ñire) occupies a latitudinal gradient ranged from 36° 30´ to 56° 00’ S, and extends from sea level to 2,000 m a.s.l. It is the species with widest ecological amplitude in Nothofagus spp. from south-America covering in southern Patagonia (Argentina) 431,000 ha and growing mainly between the N. pumilio forests and steppe where water conditions are limiting. Productivity and different ecological issues of ñire forests have been previously assessed. However, specific studies related to the functional response to water stress of species are scarce. Therefore, the main subject of present study was to evaluate the functional response and growth of ñire seedlings under the interaction of water stress and two light conditions. Ten seedlings were grown during 6 months in a climatic chamber under a photoperiod 14/10 hours of light/darkness, a temperature range of 25ºC day / 20ºC night, and 65% relative humidity. One shoot on each seedling was shaded from the beginning of the experiment with a shading mesh (transmittance of 5 % of full light). The rest of plant received at the top 800 µmolm-2s-1 PPFD. After five months of well-watering conditions, half of seedlings were submitted to a water stress cycle by one additional month. By the end of experiment, diameter growth at the base of stem seedling was measured. In addition, different leaf functional parameters were recorded: specific leaf área (SLA), net photosynthesis (An), stomatal conductance to water vapor (gwv), and different parameters from building P-V curves: osmotic potential at maximum and zero turgor (Π100; Π0), relative water content at zero turgor (RWC0), maximum modulus of elasticity (Emax), and dry/fullhydrated weight ratio (DW/TW). Plant water status was recorded measuring predawn water potential (Ψpd). Light and water stress affected most leaf functional parameters with synergic to antagonistic impacts depending on a particular trait.

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Main Authors: Bahamonde, Héctor Alejandro, Sánchez-Gómez, D., Gyenge, Javier, Peri, Pablo Luis, Aranda, I.
Format: info:ar-repo/semantics/documento de conferencia biblioteca
Language:eng
Published: Instituto de Ciências Agrárias e Ambientais Mediterrânicas da Universidade de Évora 2014-09-30
Subjects:Primary Forest, Seedlings, Drougth Stress, Light Regimes, Leaf Area Index, Photosynthesis, Stomatal Conductance, Osmotic Potential, Bosque Primario, Nothofagus, Plántulas, Estrés por Sequía, Regímenes de Luz, Índice de Area Foliar, Fotosíntesis, Conductancia Estomática, Potencial Osmótico, Functional Response, Climatic Chamber, Respuesta Funcional, Nothofagus antarctica, Ñire, Cámara Climática, Región Patagónica,
Online Access:http://hdl.handle.net/20.500.12123/10274
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record_format koha
institution INTA AR
collection DSpace
country Argentina
countrycode AR
component Bibliográfico
access En linea
databasecode dig-inta-ar
tag biblioteca
region America del Sur
libraryname Biblioteca Central del INTA Argentina
language eng
topic Primary Forest
Seedlings
Drougth Stress
Light Regimes
Leaf Area Index
Photosynthesis
Stomatal Conductance
Osmotic Potential
Bosque Primario
Nothofagus
Plántulas
Estrés por Sequía
Regímenes de Luz
Índice de Area Foliar
Fotosíntesis
Conductancia Estomática
Potencial Osmótico
Functional Response
Climatic Chamber
Respuesta Funcional
Nothofagus antarctica
Ñire
Cámara Climática
Región Patagónica
Primary Forest
Seedlings
Drougth Stress
Light Regimes
Leaf Area Index
Photosynthesis
Stomatal Conductance
Osmotic Potential
Bosque Primario
Nothofagus
Plántulas
Estrés por Sequía
Regímenes de Luz
Índice de Area Foliar
Fotosíntesis
Conductancia Estomática
Potencial Osmótico
Functional Response
Climatic Chamber
Respuesta Funcional
Nothofagus antarctica
Ñire
Cámara Climática
Región Patagónica
spellingShingle Primary Forest
Seedlings
Drougth Stress
Light Regimes
Leaf Area Index
Photosynthesis
Stomatal Conductance
Osmotic Potential
Bosque Primario
Nothofagus
Plántulas
Estrés por Sequía
Regímenes de Luz
Índice de Area Foliar
Fotosíntesis
Conductancia Estomática
Potencial Osmótico
Functional Response
Climatic Chamber
Respuesta Funcional
Nothofagus antarctica
Ñire
Cámara Climática
Región Patagónica
Primary Forest
Seedlings
Drougth Stress
Light Regimes
Leaf Area Index
Photosynthesis
Stomatal Conductance
Osmotic Potential
Bosque Primario
Nothofagus
Plántulas
Estrés por Sequía
Regímenes de Luz
Índice de Area Foliar
Fotosíntesis
Conductancia Estomática
Potencial Osmótico
Functional Response
Climatic Chamber
Respuesta Funcional
Nothofagus antarctica
Ñire
Cámara Climática
Región Patagónica
Bahamonde, Héctor Alejandro
Sánchez-Gómez, D.
Gyenge, Javier
Peri, Pablo Luis
Aranda, I.
Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst.
description Nothofagus antarctica (G. Forster) Oerst. (ñire) occupies a latitudinal gradient ranged from 36° 30´ to 56° 00’ S, and extends from sea level to 2,000 m a.s.l. It is the species with widest ecological amplitude in Nothofagus spp. from south-America covering in southern Patagonia (Argentina) 431,000 ha and growing mainly between the N. pumilio forests and steppe where water conditions are limiting. Productivity and different ecological issues of ñire forests have been previously assessed. However, specific studies related to the functional response to water stress of species are scarce. Therefore, the main subject of present study was to evaluate the functional response and growth of ñire seedlings under the interaction of water stress and two light conditions. Ten seedlings were grown during 6 months in a climatic chamber under a photoperiod 14/10 hours of light/darkness, a temperature range of 25ºC day / 20ºC night, and 65% relative humidity. One shoot on each seedling was shaded from the beginning of the experiment with a shading mesh (transmittance of 5 % of full light). The rest of plant received at the top 800 µmolm-2s-1 PPFD. After five months of well-watering conditions, half of seedlings were submitted to a water stress cycle by one additional month. By the end of experiment, diameter growth at the base of stem seedling was measured. In addition, different leaf functional parameters were recorded: specific leaf área (SLA), net photosynthesis (An), stomatal conductance to water vapor (gwv), and different parameters from building P-V curves: osmotic potential at maximum and zero turgor (Π100; Π0), relative water content at zero turgor (RWC0), maximum modulus of elasticity (Emax), and dry/fullhydrated weight ratio (DW/TW). Plant water status was recorded measuring predawn water potential (Ψpd). Light and water stress affected most leaf functional parameters with synergic to antagonistic impacts depending on a particular trait.
format info:ar-repo/semantics/documento de conferencia
topic_facet Primary Forest
Seedlings
Drougth Stress
Light Regimes
Leaf Area Index
Photosynthesis
Stomatal Conductance
Osmotic Potential
Bosque Primario
Nothofagus
Plántulas
Estrés por Sequía
Regímenes de Luz
Índice de Area Foliar
Fotosíntesis
Conductancia Estomática
Potencial Osmótico
Functional Response
Climatic Chamber
Respuesta Funcional
Nothofagus antarctica
Ñire
Cámara Climática
Región Patagónica
author Bahamonde, Héctor Alejandro
Sánchez-Gómez, D.
Gyenge, Javier
Peri, Pablo Luis
Aranda, I.
author_facet Bahamonde, Héctor Alejandro
Sánchez-Gómez, D.
Gyenge, Javier
Peri, Pablo Luis
Aranda, I.
author_sort Bahamonde, Héctor Alejandro
title Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst.
title_short Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst.
title_full Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst.
title_fullStr Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst.
title_full_unstemmed Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst.
title_sort interaction of light and water stress on the ecophysiological response of nothofagus antarctica (g. forster) oerst.
publisher Instituto de Ciências Agrárias e Ambientais Mediterrânicas da Universidade de Évora
publishDate 2014-09-30
url http://hdl.handle.net/20.500.12123/10274
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AT gyengejavier interactionoflightandwaterstressontheecophysiologicalresponseofnothofagusantarcticagforsteroerst
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spelling oai:localhost:20.500.12123-102742021-09-16T12:06:45Z Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst. Bahamonde, Héctor Alejandro Sánchez-Gómez, D. Gyenge, Javier Peri, Pablo Luis Aranda, I. Primary Forest Seedlings Drougth Stress Light Regimes Leaf Area Index Photosynthesis Stomatal Conductance Osmotic Potential Bosque Primario Nothofagus Plántulas Estrés por Sequía Regímenes de Luz Índice de Area Foliar Fotosíntesis Conductancia Estomática Potencial Osmótico Functional Response Climatic Chamber Respuesta Funcional Nothofagus antarctica Ñire Cámara Climática Región Patagónica Nothofagus antarctica (G. Forster) Oerst. (ñire) occupies a latitudinal gradient ranged from 36° 30´ to 56° 00’ S, and extends from sea level to 2,000 m a.s.l. It is the species with widest ecological amplitude in Nothofagus spp. from south-America covering in southern Patagonia (Argentina) 431,000 ha and growing mainly between the N. pumilio forests and steppe where water conditions are limiting. Productivity and different ecological issues of ñire forests have been previously assessed. However, specific studies related to the functional response to water stress of species are scarce. Therefore, the main subject of present study was to evaluate the functional response and growth of ñire seedlings under the interaction of water stress and two light conditions. Ten seedlings were grown during 6 months in a climatic chamber under a photoperiod 14/10 hours of light/darkness, a temperature range of 25ºC day / 20ºC night, and 65% relative humidity. One shoot on each seedling was shaded from the beginning of the experiment with a shading mesh (transmittance of 5 % of full light). The rest of plant received at the top 800 µmolm-2s-1 PPFD. After five months of well-watering conditions, half of seedlings were submitted to a water stress cycle by one additional month. By the end of experiment, diameter growth at the base of stem seedling was measured. In addition, different leaf functional parameters were recorded: specific leaf área (SLA), net photosynthesis (An), stomatal conductance to water vapor (gwv), and different parameters from building P-V curves: osmotic potential at maximum and zero turgor (Π100; Π0), relative water content at zero turgor (RWC0), maximum modulus of elasticity (Emax), and dry/fullhydrated weight ratio (DW/TW). Plant water status was recorded measuring predawn water potential (Ψpd). Light and water stress affected most leaf functional parameters with synergic to antagonistic impacts depending on a particular trait. EEA Santa Cruz Fil: Bahamonde, Héctor Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Bahamonde, Héctor Alejandro. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Sánchez-Gómez D. Instituto Nacional de Investigaciones y Tecnologías Agrarias y Alimentarias. Centro de Investigación Forestal (INIA-CIFOR); Chile. Fil: Gyenge Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Agencia de Extensión Rural Tandil; Argentina. Fil: Gyenge Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Aranda, I. Instituto Nacional de Investigaciones y Tecnologías Agrarias y Alimentarias. Centro de Investigación Forestal (INIA-CIFOR); Chile. 2021-09-16T11:39:45Z 2021-09-16T11:39:45Z 2014-09-30 info:ar-repo/semantics/documento de conferencia info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/10274 Bahamonde H.; Sanchez-Gomez D.; Gyenge J.; Peri, P.L.; Aranda I. (2014) Interaction of light and water stress on the ecophysiological response of Nothofagus antarctica (G. Forster) Oerst. Proceedings XII Luso-Spanish Symposium on Plant Water Relations – Water to Feed the World, pp. 101-104. Instituto de Ciências Agrárias e Ambientais Mediterrânicas da Universidade de Évora. Évora, Portugal. 30 Septiembre - 3 Octubre 2014. eng info:eu-repo/semantics/openAccess application/pdf Instituto de Ciências Agrárias e Ambientais Mediterrânicas da Universidade de Évora Proceedings XII Portuguese-Spanish Symposium on Plant Water Relations – Water to Feed the World, p. 101-104.