Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina

Autores
Peri, Pablo Luis; Martínez Pastur, Guillermo José; Lencinas, María Vanessa
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Net photosynthetic rate (A) and stomatal conductance (gs) of seedlings of Nothofagus. pumilio and N. antarctica leaves were measured at different light intensity (20, 150, 250, 500, 750, 1000, 1500 and 2200 µmol m-2 s-1 photosynthetic photon flux density, PPFD) and after 60 minutes of severe shade to determine the lag in the rise of photosynthesis rate from low to high irradiance levels (induction state). Also, A and gs were measured to evaluate the responses to water stress and the tolerance to waterlogging in the two species. N. pumilio had higher A values than N. antarctica for all light intensities measured with a maximum value of 16.8 µmol CO2 m-2 s-1 saturated at 1000 µmol m-2 s-1 PPFD. Values of gs for both Nothofagus species also declined as light intensity decreased at a rate of 0.0002 mol H2O m-2 s-1/µmol m-2 s-1 PPFD. The times required for full induction of A were 18 and 27 minutes after the increase of PPFD (full sun) for N. pumilio and N. antarctica, respectively. There was a negative relationship between A and water stress expressed as pre-dawn leaf water potential (ψlp) where the reduction in gs was the main factor that reduced A in both species. A reached a negative value from -17.0 bar for N. pumilio and from -27.0 bar for N. antarctica. Tolerance to waterlogging was related with changes in A and gs being N. antarctica was more tolerant. After 10 days of waterlogging the average decrease in A was 83% for N. pumilio and 65% for N. antarctica. These defined photosynthetic results of Nothofagus leaves to fluctuating light regimes, water stress and waterlogging could be used to estimate the responses of regeneration to environmental conditions under the dynamic of natural stands, after silviculture practices, and degraded sites for restoration plans.
Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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
Materia
Nothofagus
Shade
Photosynthesis
water stress
waterlogging
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:11336/128837
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/128837
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, ArgentinaPeri, Pablo LuisMartínez Pastur, Guillermo JoséLencinas, María VanessaNothofagusShadePhotosynthesiswater stresswaterlogginghttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Net photosynthetic rate (A) and stomatal conductance (gs) of seedlings of Nothofagus. pumilio and N. antarctica leaves were measured at different light intensity (20, 150, 250, 500, 750, 1000, 1500 and 2200 µmol m-2 s-1 photosynthetic photon flux density, PPFD) and after 60 minutes of severe shade to determine the lag in the rise of photosynthesis rate from low to high irradiance levels (induction state). Also, A and gs were measured to evaluate the responses to water stress and the tolerance to waterlogging in the two species. N. pumilio had higher A values than N. antarctica for all light intensities measured with a maximum value of 16.8 µmol CO2 m-2 s-1 saturated at 1000 µmol m-2 s-1 PPFD. Values of gs for both Nothofagus species also declined as light intensity decreased at a rate of 0.0002 mol H2O m-2 s-1/µmol m-2 s-1 PPFD. The times required for full induction of A were 18 and 27 minutes after the increase of PPFD (full sun) for N. pumilio and N. antarctica, respectively. There was a negative relationship between A and water stress expressed as pre-dawn leaf water potential (ψlp) where the reduction in gs was the main factor that reduced A in both species. A reached a negative value from -17.0 bar for N. pumilio and from -27.0 bar for N. antarctica. Tolerance to waterlogging was related with changes in A and gs being N. antarctica was more tolerant. After 10 days of waterlogging the average decrease in A was 83% for N. pumilio and 65% for N. antarctica. These defined photosynthetic results of Nothofagus leaves to fluctuating light regimes, water stress and waterlogging could be used to estimate the responses of regeneration to environmental conditions under the dynamic of natural stands, after silviculture practices, and degraded sites for restoration plans.Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: 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; ArgentinaCzech Academy of Agricultural Sciences2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/128837Peri, Pablo Luis; Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina; Czech Academy of Agricultural Sciences; Journal of Forest Science; 55; 3; 12-2009; 101-1111212-4834CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.17221/66/2008-JFSinfo:eu-repo/semantics/altIdentifier/url/https://www.agriculturejournals.cz/web/jfs.htm?type=article&id=66_2008-JFSinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:15:07Zoai:ri.conicet.gov.ar:11336/128837instacron: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:34982025-10-15 15:15:07.785CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
title Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
spellingShingle Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
Peri, Pablo Luis
Nothofagus
Shade
Photosynthesis
water stress
waterlogging
title_short Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
title_full Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
title_fullStr Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
title_full_unstemmed Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
title_sort Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina
dc.creator.none.fl_str_mv Peri, Pablo Luis
Martínez Pastur, Guillermo José
Lencinas, María Vanessa
author Peri, Pablo Luis
author_facet Peri, Pablo Luis
Martínez Pastur, Guillermo José
Lencinas, María Vanessa
author_role author
author2 Martínez Pastur, Guillermo José
Lencinas, María Vanessa
author2_role author
author
dc.subject.none.fl_str_mv Nothofagus
Shade
Photosynthesis
water stress
waterlogging
topic Nothofagus
Shade
Photosynthesis
water stress
waterlogging
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Net photosynthetic rate (A) and stomatal conductance (gs) of seedlings of Nothofagus. pumilio and N. antarctica leaves were measured at different light intensity (20, 150, 250, 500, 750, 1000, 1500 and 2200 µmol m-2 s-1 photosynthetic photon flux density, PPFD) and after 60 minutes of severe shade to determine the lag in the rise of photosynthesis rate from low to high irradiance levels (induction state). Also, A and gs were measured to evaluate the responses to water stress and the tolerance to waterlogging in the two species. N. pumilio had higher A values than N. antarctica for all light intensities measured with a maximum value of 16.8 µmol CO2 m-2 s-1 saturated at 1000 µmol m-2 s-1 PPFD. Values of gs for both Nothofagus species also declined as light intensity decreased at a rate of 0.0002 mol H2O m-2 s-1/µmol m-2 s-1 PPFD. The times required for full induction of A were 18 and 27 minutes after the increase of PPFD (full sun) for N. pumilio and N. antarctica, respectively. There was a negative relationship between A and water stress expressed as pre-dawn leaf water potential (ψlp) where the reduction in gs was the main factor that reduced A in both species. A reached a negative value from -17.0 bar for N. pumilio and from -27.0 bar for N. antarctica. Tolerance to waterlogging was related with changes in A and gs being N. antarctica was more tolerant. After 10 days of waterlogging the average decrease in A was 83% for N. pumilio and 65% for N. antarctica. These defined photosynthetic results of Nothofagus leaves to fluctuating light regimes, water stress and waterlogging could be used to estimate the responses of regeneration to environmental conditions under the dynamic of natural stands, after silviculture practices, and degraded sites for restoration plans.
Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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
description Net photosynthetic rate (A) and stomatal conductance (gs) of seedlings of Nothofagus. pumilio and N. antarctica leaves were measured at different light intensity (20, 150, 250, 500, 750, 1000, 1500 and 2200 µmol m-2 s-1 photosynthetic photon flux density, PPFD) and after 60 minutes of severe shade to determine the lag in the rise of photosynthesis rate from low to high irradiance levels (induction state). Also, A and gs were measured to evaluate the responses to water stress and the tolerance to waterlogging in the two species. N. pumilio had higher A values than N. antarctica for all light intensities measured with a maximum value of 16.8 µmol CO2 m-2 s-1 saturated at 1000 µmol m-2 s-1 PPFD. Values of gs for both Nothofagus species also declined as light intensity decreased at a rate of 0.0002 mol H2O m-2 s-1/µmol m-2 s-1 PPFD. The times required for full induction of A were 18 and 27 minutes after the increase of PPFD (full sun) for N. pumilio and N. antarctica, respectively. There was a negative relationship between A and water stress expressed as pre-dawn leaf water potential (ψlp) where the reduction in gs was the main factor that reduced A in both species. A reached a negative value from -17.0 bar for N. pumilio and from -27.0 bar for N. antarctica. Tolerance to waterlogging was related with changes in A and gs being N. antarctica was more tolerant. After 10 days of waterlogging the average decrease in A was 83% for N. pumilio and 65% for N. antarctica. These defined photosynthetic results of Nothofagus leaves to fluctuating light regimes, water stress and waterlogging could be used to estimate the responses of regeneration to environmental conditions under the dynamic of natural stands, after silviculture practices, and degraded sites for restoration plans.
publishDate 2009
dc.date.none.fl_str_mv 2009-12
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/11336/128837
Peri, Pablo Luis; Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina; Czech Academy of Agricultural Sciences; Journal of Forest Science; 55; 3; 12-2009; 101-111
1212-4834
CONICET Digital
CONICET
url http://hdl.handle.net/11336/128837
identifier_str_mv Peri, Pablo Luis; Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Photosynthetic response to different light intensities and water status of two main Nothofagus species of southern Patagonian forest, Argentina; Czech Academy of Agricultural Sciences; Journal of Forest Science; 55; 3; 12-2009; 101-111
1212-4834
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.17221/66/2008-JFS
info:eu-repo/semantics/altIdentifier/url/https://www.agriculturejournals.cz/web/jfs.htm?type=article&id=66_2008-JFS
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
dc.publisher.none.fl_str_mv Czech Academy of Agricultural Sciences
publisher.none.fl_str_mv Czech Academy of Agricultural Sciences
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 13.22299

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