Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina
Global climate change (CC) is an evolutionary challenge for natural tree populations. Scientific experts forecast an increase in temperature and a decrease in precipitation in the Argentine Patagonian Cordillera. Knowledge of the variation of adaptive traits at the seedling stage is crucial to predi...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/2566 https://link.springer.com/article/10.1007/s11056-018-9647-3 |
| _version_ | 1855483079110426624 |
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| author | Duboscq Carra, Virginia Gisela Letourneau, Federico Jorge Pastorino, Mario Juan |
| author_browse | Duboscq Carra, Virginia Gisela Letourneau, Federico Jorge Pastorino, Mario Juan |
| author_facet | Duboscq Carra, Virginia Gisela Letourneau, Federico Jorge Pastorino, Mario Juan |
| author_sort | Duboscq Carra, Virginia Gisela |
| collection | INTA Digital |
| description | Global climate change (CC) is an evolutionary challenge for natural tree populations. Scientific experts forecast an increase in temperature and a decrease in precipitation in the Argentine Patagonian Cordillera. Knowledge of the variation of adaptive traits at the seedling stage is crucial to prediction the adaptability of forest tree species. We aim to analyze genetic variation in root and shoot quantitative traits among and within natural populations of two key North Patagonian forest species, in order to evaluate their ability to deal with CC through adaptation. We established two common garden nursery trials: (1) 81 open pollinated families of Nothofagus obliqua from eight natural populations, and (2) 74 families of Nothofagus alpina from seven populations. At the end of the first growing season we measured shoot height, diameter, root length and root and stem dry biomass; we also estimated foliage biomass. In addition the root to stem ratio, specific root length and the root to shoot ratio were calculated. For both species intra-population variation was generally low, and average differentiation was moderate, with high levels of differentiation in some traits related to drought stress, indicating low adaptation capacity but also adaptation
to current stressful conditions, which means it may be possible for some populations to survive CC without changing their genetic structures. Further studies are needed, including phenotypic plasticity assays, to complete the picture. |
| format | Artículo |
| id | INTA2566 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA25662018-06-07T14:07:51Z Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina Duboscq Carra, Virginia Gisela Letourneau, Federico Jorge Pastorino, Mario Juan Nothofagus Plántulas Seedlings Climate Change Cambio Climático Genética Forestal Global climate change (CC) is an evolutionary challenge for natural tree populations. Scientific experts forecast an increase in temperature and a decrease in precipitation in the Argentine Patagonian Cordillera. Knowledge of the variation of adaptive traits at the seedling stage is crucial to prediction the adaptability of forest tree species. We aim to analyze genetic variation in root and shoot quantitative traits among and within natural populations of two key North Patagonian forest species, in order to evaluate their ability to deal with CC through adaptation. We established two common garden nursery trials: (1) 81 open pollinated families of Nothofagus obliqua from eight natural populations, and (2) 74 families of Nothofagus alpina from seven populations. At the end of the first growing season we measured shoot height, diameter, root length and root and stem dry biomass; we also estimated foliage biomass. In addition the root to stem ratio, specific root length and the root to shoot ratio were calculated. For both species intra-population variation was generally low, and average differentiation was moderate, with high levels of differentiation in some traits related to drought stress, indicating low adaptation capacity but also adaptation to current stressful conditions, which means it may be possible for some populations to survive CC without changing their genetic structures. Further studies are needed, including phenotypic plasticity assays, to complete the picture. Estación Experimental Agropecuaria Bariloche Fil: Duboscq-Carra, Virginia Gisela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área Forestal; Argentina Fil: Letourneau, Federico Jorge. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área Sistemas Forestales. Campo Experimental Forestal San Martín; Argentina Fil: Pastorino, Mario Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área Sistemas Forestales; Argentina 2018-06-07T14:00:37Z 2018-06-07T14:00:37Z 2018-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/2566 https://link.springer.com/article/10.1007/s11056-018-9647-3 0169-4286 1573-5095 eng info:eu-repograntAgreement/INTA/PNFOR/044321/AR./Domesticación de especies forestales nativas patagónicas info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Argentina (nation) New Forests : 1-12 (May 2018) |
| spellingShingle | Nothofagus Plántulas Seedlings Climate Change Cambio Climático Genética Forestal Duboscq Carra, Virginia Gisela Letourneau, Federico Jorge Pastorino, Mario Juan Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina |
| title | Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina |
| title_full | Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina |
| title_fullStr | Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina |
| title_full_unstemmed | Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina |
| title_short | Looking at the forest from below: the role of seedling root traits in the adaptation to climate change of two Nothofagus species in Argentina |
| title_sort | looking at the forest from below the role of seedling root traits in the adaptation to climate change of two nothofagus species in argentina |
| topic | Nothofagus Plántulas Seedlings Climate Change Cambio Climático Genética Forestal |
| url | http://hdl.handle.net/20.500.12123/2566 https://link.springer.com/article/10.1007/s11056-018-9647-3 |
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