Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture

Autores
Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Peri, Pablo Luis; Arena, Miriam Elisabet
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nothofagus seedlings often survive and grow slowly for a long time in the shaded understory. This creates a seedling bank with a potential advantage in reestablishing canopy disturbances. To manage primary forests more effectively, it is important to understand the basis of plant regeneration ecophysiology, and their plasticity to changes in environmental factors. The objective was to evaluate the photosynthesis plasticity of N. pumilio seedlings to light intensity and soil moisture gradients; and to relate them with silvicultural prescriptions. Six treatments with three light intensities (4%, 26% and 64% of the natural incident irradiance) and two soil moistures levels (40-60% and 80-100% soil capacity) were assayed under greenhouse controlled conditions. CO2 gas exchanges were measured every month on seedlings growing in each condition. In the shaded treatments seedlings grow below their optimum phototsynthetic potential (leaf light-saturated net photosynthesis rate of 5.1 µmol CO2 m-2 s-1) compared with the lighted treatments by improving their photosynthetic performance (8.3-8.4 µmol CO2 m-2 s-1). Seedling growing under low soil moisture conditions had higher leaf light-saturated net photosynthesis rate than plants grown under 80-100% soil water capacity (7.8 µmol CO2 m-2 s-1 and 6.6 µmol CO2 m-2 s-1, respectively). When light (up to 150-200 µmol m-2 s-1) and soil moisture (40-60% soil capacity) levels were favourable, seedling plants could exhibit their maximum photosynthetic capacity. If one of these factors became limiting, the plants reduced their photosynthesis rate, e.g. Nohofagus pumilio seedlings with enough light and high levels of soil moisture, probably decreased their growth and fine roots activity. For this, application of silviculture systems must take into account the changes in both factors (light and soil moisture) for maximize the growth potential in the natural regeneration. These findings must be combined with morphological variables at a whole-plant, shoot, crown and leaf levels to determine the optimum growth conditions.
Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Arena, Miriam Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Materia
Forest management
Sylviculture
Regeneration
Ecophysiology
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/155860
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/155860
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moistureMartínez Pastur, Guillermo JoséLencinas, María VanessaPeri, Pablo LuisArena, Miriam ElisabetForest managementSylvicultureRegenerationEcophysiologyhttps://purl.org/becyt/ford/4.4https://purl.org/becyt/ford/4Nothofagus seedlings often survive and grow slowly for a long time in the shaded understory. This creates a seedling bank with a potential advantage in reestablishing canopy disturbances. To manage primary forests more effectively, it is important to understand the basis of plant regeneration ecophysiology, and their plasticity to changes in environmental factors. The objective was to evaluate the photosynthesis plasticity of N. pumilio seedlings to light intensity and soil moisture gradients; and to relate them with silvicultural prescriptions. Six treatments with three light intensities (4%, 26% and 64% of the natural incident irradiance) and two soil moistures levels (40-60% and 80-100% soil capacity) were assayed under greenhouse controlled conditions. CO2 gas exchanges were measured every month on seedlings growing in each condition. In the shaded treatments seedlings grow below their optimum phototsynthetic potential (leaf light-saturated net photosynthesis rate of 5.1 µmol CO2 m-2 s-1) compared with the lighted treatments by improving their photosynthetic performance (8.3-8.4 µmol CO2 m-2 s-1). Seedling growing under low soil moisture conditions had higher leaf light-saturated net photosynthesis rate than plants grown under 80-100% soil water capacity (7.8 µmol CO2 m-2 s-1 and 6.6 µmol CO2 m-2 s-1, respectively). When light (up to 150-200 µmol m-2 s-1) and soil moisture (40-60% soil capacity) levels were favourable, seedling plants could exhibit their maximum photosynthetic capacity. If one of these factors became limiting, the plants reduced their photosynthesis rate, e.g. Nohofagus pumilio seedlings with enough light and high levels of soil moisture, probably decreased their growth and fine roots activity. For this, application of silviculture systems must take into account the changes in both factors (light and soil moisture) for maximize the growth potential in the natural regeneration. These findings must be combined with morphological variables at a whole-plant, shoot, crown and leaf levels to determine the optimum growth conditions.Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Arena, Miriam Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaElsevier Science2007-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/155860Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Peri, Pablo Luis; Arena, Miriam Elisabet; Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture; Elsevier Science; Forest Ecology and Management; 243; 2-3; 5-2007; 274-2820378-1127CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.foreco.2007.03.034info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0378112707002319?via%3Dihub#!info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:22:52Zoai:ri.conicet.gov.ar:11336/155860instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:22:52.939CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
title Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
spellingShingle Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
Martínez Pastur, Guillermo José
Forest management
Sylviculture
Regeneration
Ecophysiology
title_short Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
title_full Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
title_fullStr Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
title_full_unstemmed Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
title_sort Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
dc.creator.none.fl_str_mv Martínez Pastur, Guillermo José
Lencinas, María Vanessa
Peri, Pablo Luis
Arena, Miriam Elisabet
author Martínez Pastur, Guillermo José
author_facet Martínez Pastur, Guillermo José
Lencinas, María Vanessa
Peri, Pablo Luis
Arena, Miriam Elisabet
author_role author
author2 Lencinas, María Vanessa
Peri, Pablo Luis
Arena, Miriam Elisabet
author2_role author
author
author
dc.subject.none.fl_str_mv Forest management
Sylviculture
Regeneration
Ecophysiology
topic Forest management
Sylviculture
Regeneration
Ecophysiology
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.4
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Nothofagus seedlings often survive and grow slowly for a long time in the shaded understory. This creates a seedling bank with a potential advantage in reestablishing canopy disturbances. To manage primary forests more effectively, it is important to understand the basis of plant regeneration ecophysiology, and their plasticity to changes in environmental factors. The objective was to evaluate the photosynthesis plasticity of N. pumilio seedlings to light intensity and soil moisture gradients; and to relate them with silvicultural prescriptions. Six treatments with three light intensities (4%, 26% and 64% of the natural incident irradiance) and two soil moistures levels (40-60% and 80-100% soil capacity) were assayed under greenhouse controlled conditions. CO2 gas exchanges were measured every month on seedlings growing in each condition. In the shaded treatments seedlings grow below their optimum phototsynthetic potential (leaf light-saturated net photosynthesis rate of 5.1 µmol CO2 m-2 s-1) compared with the lighted treatments by improving their photosynthetic performance (8.3-8.4 µmol CO2 m-2 s-1). Seedling growing under low soil moisture conditions had higher leaf light-saturated net photosynthesis rate than plants grown under 80-100% soil water capacity (7.8 µmol CO2 m-2 s-1 and 6.6 µmol CO2 m-2 s-1, respectively). When light (up to 150-200 µmol m-2 s-1) and soil moisture (40-60% soil capacity) levels were favourable, seedling plants could exhibit their maximum photosynthetic capacity. If one of these factors became limiting, the plants reduced their photosynthesis rate, e.g. Nohofagus pumilio seedlings with enough light and high levels of soil moisture, probably decreased their growth and fine roots activity. For this, application of silviculture systems must take into account the changes in both factors (light and soil moisture) for maximize the growth potential in the natural regeneration. These findings must be combined with morphological variables at a whole-plant, shoot, crown and leaf levels to determine the optimum growth conditions.
Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Arena, Miriam Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
description Nothofagus seedlings often survive and grow slowly for a long time in the shaded understory. This creates a seedling bank with a potential advantage in reestablishing canopy disturbances. To manage primary forests more effectively, it is important to understand the basis of plant regeneration ecophysiology, and their plasticity to changes in environmental factors. The objective was to evaluate the photosynthesis plasticity of N. pumilio seedlings to light intensity and soil moisture gradients; and to relate them with silvicultural prescriptions. Six treatments with three light intensities (4%, 26% and 64% of the natural incident irradiance) and two soil moistures levels (40-60% and 80-100% soil capacity) were assayed under greenhouse controlled conditions. CO2 gas exchanges were measured every month on seedlings growing in each condition. In the shaded treatments seedlings grow below their optimum phototsynthetic potential (leaf light-saturated net photosynthesis rate of 5.1 µmol CO2 m-2 s-1) compared with the lighted treatments by improving their photosynthetic performance (8.3-8.4 µmol CO2 m-2 s-1). Seedling growing under low soil moisture conditions had higher leaf light-saturated net photosynthesis rate than plants grown under 80-100% soil water capacity (7.8 µmol CO2 m-2 s-1 and 6.6 µmol CO2 m-2 s-1, respectively). When light (up to 150-200 µmol m-2 s-1) and soil moisture (40-60% soil capacity) levels were favourable, seedling plants could exhibit their maximum photosynthetic capacity. If one of these factors became limiting, the plants reduced their photosynthesis rate, e.g. Nohofagus pumilio seedlings with enough light and high levels of soil moisture, probably decreased their growth and fine roots activity. For this, application of silviculture systems must take into account the changes in both factors (light and soil moisture) for maximize the growth potential in the natural regeneration. These findings must be combined with morphological variables at a whole-plant, shoot, crown and leaf levels to determine the optimum growth conditions.
publishDate 2007
dc.date.none.fl_str_mv 2007-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/155860
Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Peri, Pablo Luis; Arena, Miriam Elisabet; Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture; Elsevier Science; Forest Ecology and Management; 243; 2-3; 5-2007; 274-282
0378-1127
CONICET Digital
CONICET
url http://hdl.handle.net/11336/155860
identifier_str_mv Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Peri, Pablo Luis; Arena, Miriam Elisabet; Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture; Elsevier Science; Forest Ecology and Management; 243; 2-3; 5-2007; 274-282
0378-1127
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.foreco.2007.03.034
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0378112707002319?via%3Dihub#!
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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