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dc.contributor.author
Martínez Pastur, Guillermo José
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dc.contributor.author
Lencinas, María Vanessa
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dc.contributor.author
Peri, Pablo Luis
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dc.contributor.author
Arena, Miriam Elisabet
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dc.date.available
2022-04-27T12:30:20Z
dc.date.issued
2007-05
dc.identifier.citation
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
dc.identifier.issn
0378-1127
dc.identifier.uri
http://hdl.handle.net/11336/155860
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Forest management
dc.subject
Sylviculture
dc.subject
Regeneration
dc.subject
Ecophysiology
dc.subject.classification
Biotecnología Agrícola y Biotecnología Alimentaria
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dc.subject.classification
Biotecnología Agropecuaria
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Photosynthetic plasticity of Nothofagus pumilio seedlings to light intensity and soil moisture
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-04-26T18:42:59Z
dc.journal.volume
243
dc.journal.number
2-3
dc.journal.pagination
274-282
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Arena, Miriam Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.journal.title
Forest Ecology and Management
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.foreco.2007.03.034
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0378112707002319?via%3Dihub#!
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