Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation
The resistance of different genotypes to abiotic stress may be due to genetic effects and/or to phenotypic plasticity allowing them to acclimate to variable conditions. The contribution of one or the other mechanism determines different strategies with implications for the species conservation and a...
| Main Authors: | , , , , |
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Springer
2022
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/12203 https://link.springer.com/article/10.1007/s10342-021-01389-6 https://doi.org/10.1007/s10342-021-01389-6 |
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| author | Soliani, Carolina Mattera, María Gabriela Marchelli, Paula Azpilicueta, Maria Marta Dalla Salda, Guillermina |
| author_browse | Azpilicueta, Maria Marta Dalla Salda, Guillermina Marchelli, Paula Mattera, María Gabriela Soliani, Carolina |
| author_facet | Soliani, Carolina Mattera, María Gabriela Marchelli, Paula Azpilicueta, Maria Marta Dalla Salda, Guillermina |
| author_sort | Soliani, Carolina |
| collection | INTA Digital |
| description | The resistance of different genotypes to abiotic stress may be due to genetic effects and/or to phenotypic plasticity allowing them to acclimate to variable conditions. The contribution of one or the other mechanism determines different strategies with implications for the species conservation and adaptive management. In this study, the ecophysiological response to drought of Nothofagus pumilio provenance sites (humid, mesic and xeric) from contrasting precipitation regimes was evaluated in a common garden trial. Seedlings were submitted to progressive drought by withdrawing irrigation (control vs water deficit). Assuming a genetic base determined by selection pressures, populations from more xeric sites are expected to show higher resistance to drought, e. g., higher resistance to xylem cavitation and safety margin, stronger stomatal control and osmotic adjustment. Vulnerability to cavitation curves were performed, and the percentage loss of conductivity (P12, P50, P88 and slope) was obtained. The water potential at turgor loss point (TLP) and the osmotic potential at full turgor (π100) were calculated from pressure–volume curves. The humid site showed a significantly higher P50 value than the mesic and the xeric sites. Pre-dawn water potential differed between the provenances from xeric and mesic conditions under severe water deficit. Natural selection was inferred from the comparison of differentiation at neutral markers and phenotypic traits (FST vs. PST), with signals of adaptive variation (PST > FST) for stomatal density, specific leaf area, TLP, π100 and stomatal conductance. Results suggest a differential adaptive capacity to drought of N. pumilio provenance sites that could be evidencing local adaptation to their home environment. |
| format | info:ar-repo/semantics/artículo |
| id | INTA12203 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | INTA122032022-06-30T13:48:50Z Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation Soliani, Carolina Mattera, María Gabriela Marchelli, Paula Azpilicueta, Maria Marta Dalla Salda, Guillermina Nothofagus Nothofagus Pumilio Estrés de Sequía Variación Genética Bosques Drought Stress Genetic Variation Forests Región Patagónica The resistance of different genotypes to abiotic stress may be due to genetic effects and/or to phenotypic plasticity allowing them to acclimate to variable conditions. The contribution of one or the other mechanism determines different strategies with implications for the species conservation and adaptive management. In this study, the ecophysiological response to drought of Nothofagus pumilio provenance sites (humid, mesic and xeric) from contrasting precipitation regimes was evaluated in a common garden trial. Seedlings were submitted to progressive drought by withdrawing irrigation (control vs water deficit). Assuming a genetic base determined by selection pressures, populations from more xeric sites are expected to show higher resistance to drought, e. g., higher resistance to xylem cavitation and safety margin, stronger stomatal control and osmotic adjustment. Vulnerability to cavitation curves were performed, and the percentage loss of conductivity (P12, P50, P88 and slope) was obtained. The water potential at turgor loss point (TLP) and the osmotic potential at full turgor (π100) were calculated from pressure–volume curves. The humid site showed a significantly higher P50 value than the mesic and the xeric sites. Pre-dawn water potential differed between the provenances from xeric and mesic conditions under severe water deficit. Natural selection was inferred from the comparison of differentiation at neutral markers and phenotypic traits (FST vs. PST), with signals of adaptive variation (PST > FST) for stomatal density, specific leaf area, TLP, π100 and stomatal conductance. Results suggest a differential adaptive capacity to drought of N. pumilio provenance sites that could be evidencing local adaptation to their home environment. Estación Experimental Agropecuaria Bariloche Fil: Soliani, Carolina. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Area Forestal. Grupo de Genética Ecológica y Mejoramiento Forestal; Argentina Fil: Soliani, Carolina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Mattera, Maria Gabriela. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Area Forestal. Grupo de Genética Ecológica y Mejoramiento Forestal; Argentina Fil: Mattera, Maria Gabriela. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Marchelli, Paula. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estacion Experimental Agropecuaria Bariloche. Grupo de Ecologia Forestal; Argentina Fil: Marchelli, Paula. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Azpilicueta, Maria Marta. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estacion Experimental Agropecuaria Bariloche. Area Forestal; Argentina Fil: Azpilicueta, Maria Marta. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Dalla Salda, Guillermina. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Area Forestal. Grupo de Ecológica Forestal; Argentina Fil: Dalla Salda, Guillermina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina 2022-06-30T13:35:00Z 2022-06-30T13:35:00Z 2021-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/12203 https://link.springer.com/article/10.1007/s10342-021-01389-6 1612-4669 1612-4677 https://doi.org/10.1007/s10342-021-01389-6 eng info:eu-repo/semantics/restrictedAccess application/pdf Springer European Journal of Forest Research 140 : 1147-1161. (2021) |
| spellingShingle | Nothofagus Nothofagus Pumilio Estrés de Sequía Variación Genética Bosques Drought Stress Genetic Variation Forests Región Patagónica Soliani, Carolina Mattera, María Gabriela Marchelli, Paula Azpilicueta, Maria Marta Dalla Salda, Guillermina Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation |
| title | Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation |
| title_full | Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation |
| title_fullStr | Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation |
| title_full_unstemmed | Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation |
| title_short | Different drought‑adaptive capacity of a native Patagonian tree species (Nothofagus pumilio) resulting from local adaptation |
| title_sort | different drought adaptive capacity of a native patagonian tree species nothofagus pumilio resulting from local adaptation |
| topic | Nothofagus Nothofagus Pumilio Estrés de Sequía Variación Genética Bosques Drought Stress Genetic Variation Forests Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/12203 https://link.springer.com/article/10.1007/s10342-021-01389-6 https://doi.org/10.1007/s10342-021-01389-6 |
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