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 Elizabeth
- 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 photosynthetic plasticity of Nothofagus 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 photosynthetic 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 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 photosynthetic rate, e.g. N. 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.
EEA Santa Cruz
Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina.
Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); 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: Arena, Miriam Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina. - Fuente
- Forest Ecology and Management 243 (2-3) : 274-282. (2007)
- Materia
-
Primary Forests
Silviculture
Regeneration
Ecophysiology
Respiration
Gas Exchange
Photosynthesis
Seedlings
Bosques Primarios
Silvicultura
Regeneración
Ecofisiología
Respiración
Intercambio de Gases
Fotosíntesis
Nothofagus pumilio
Plántulas
Light Intensity
Intensidad de Luz
Región Patagónica - Nivel de accesibilidad
- acceso restringido
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Instituto Nacional de Tecnología Agropecuaria
- OAI Identificador
- oai:localhost:20.500.12123/23918
Ver los metadatos del registro completo
id |
INTADig_6fa372c77250ac064abaa9bc6622c187 |
---|---|
oai_identifier_str |
oai:localhost:20.500.12123/23918 |
network_acronym_str |
INTADig |
repository_id_str |
l |
network_name_str |
INTA Digital (INTA) |
spelling |
Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moistureMartínez Pastur, Guillermo JoséLencinas, María VanessaPeri, Pablo LuisArena, Miriam ElizabethPrimary ForestsSilvicultureRegenerationEcophysiologyRespirationGas ExchangePhotosynthesisSeedlingsBosques PrimariosSilviculturaRegeneraciónEcofisiologíaRespiraciónIntercambio de GasesFotosíntesisNothofagus pumilioPlántulasLight IntensityIntensidad de LuzRegión PatagónicaNothofagus 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 photosynthetic plasticity of Nothofagus 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 photosynthetic 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 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 photosynthetic rate, e.g. N. 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.EEA Santa CruzFil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina.Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); 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: Arena, Miriam Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina.Elsevier2025-09-24T11:33:24Z2025-09-24T11:33:24Z2007-05-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/23918https://www.sciencedirect.com/science/article/pii/S0378112707002319Martínez Pastur G., Lencinas M.V., Peri P.L., Arena M. (2007) Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture. Forest Ecology and Management 243: 274-282.0378-1127https://doi.org/10.1016/j.foreco.2007.03.034Forest Ecology and Management 243 (2-3) : 274-282. (2007)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-29T13:47:32Zoai:localhost:20.500.12123/23918instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:47:33.086INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse |
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 Primary Forests Silviculture Regeneration Ecophysiology Respiration Gas Exchange Photosynthesis Seedlings Bosques Primarios Silvicultura Regeneración Ecofisiología Respiración Intercambio de Gases Fotosíntesis Nothofagus pumilio Plántulas Light Intensity Intensidad de Luz Región Patagónica |
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 Elizabeth |
author |
Martínez Pastur, Guillermo José |
author_facet |
Martínez Pastur, Guillermo José Lencinas, María Vanessa Peri, Pablo Luis Arena, Miriam Elizabeth |
author_role |
author |
author2 |
Lencinas, María Vanessa Peri, Pablo Luis Arena, Miriam Elizabeth |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Primary Forests Silviculture Regeneration Ecophysiology Respiration Gas Exchange Photosynthesis Seedlings Bosques Primarios Silvicultura Regeneración Ecofisiología Respiración Intercambio de Gases Fotosíntesis Nothofagus pumilio Plántulas Light Intensity Intensidad de Luz Región Patagónica |
topic |
Primary Forests Silviculture Regeneration Ecophysiology Respiration Gas Exchange Photosynthesis Seedlings Bosques Primarios Silvicultura Regeneración Ecofisiología Respiración Intercambio de Gases Fotosíntesis Nothofagus pumilio Plántulas Light Intensity Intensidad de Luz Región Patagónica |
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 photosynthetic plasticity of Nothofagus 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 photosynthetic 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 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 photosynthetic rate, e.g. N. 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. EEA Santa Cruz Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina. Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); 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: Arena, Miriam Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); 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 photosynthetic plasticity of Nothofagus 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 photosynthetic 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 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 photosynthetic rate, e.g. N. 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 |
2007-05-31 2025-09-24T11:33:24Z 2025-09-24T11:33:24Z |
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/20.500.12123/23918 https://www.sciencedirect.com/science/article/pii/S0378112707002319 Martínez Pastur G., Lencinas M.V., Peri P.L., Arena M. (2007) Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture. Forest Ecology and Management 243: 274-282. 0378-1127 https://doi.org/10.1016/j.foreco.2007.03.034 |
url |
http://hdl.handle.net/20.500.12123/23918 https://www.sciencedirect.com/science/article/pii/S0378112707002319 https://doi.org/10.1016/j.foreco.2007.03.034 |
identifier_str_mv |
Martínez Pastur G., Lencinas M.V., Peri P.L., Arena M. (2007) Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture. Forest Ecology and Management 243: 274-282. 0378-1127 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
restrictedAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
Forest Ecology and Management 243 (2-3) : 274-282. (2007) reponame:INTA Digital (INTA) instname:Instituto Nacional de Tecnología Agropecuaria |
reponame_str |
INTA Digital (INTA) |
collection |
INTA Digital (INTA) |
instname_str |
Instituto Nacional de Tecnología Agropecuaria |
repository.name.fl_str_mv |
INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria |
repository.mail.fl_str_mv |
tripaldi.nicolas@inta.gob.ar |
_version_ |
1844619209751920640 |
score |
13.070432 |