Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids
Natural hybridization commonly produces individuals with intermediate morphological and genetic characteristics, but their response to environmental stress is still uncertain, with some studies showing that transgressive performance would be common. Prosopis chilensis and Prosopis flexuosa are the m...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Springer
2018
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/3731 https://link.springer.com/article/10.1007/s00468-012-0798-0#citeas https://doi.org/10.1007/s00468-012-0798-0 |
| _version_ | 1855483292646637568 |
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| author | Lopez Lauenstein, Diego Fernandez, María Elena Verga, Anibal |
| author_browse | Fernandez, María Elena Lopez Lauenstein, Diego Verga, Anibal |
| author_facet | Lopez Lauenstein, Diego Fernandez, María Elena Verga, Anibal |
| author_sort | Lopez Lauenstein, Diego |
| collection | INTA Digital |
| description | Natural hybridization commonly produces individuals with intermediate morphological and genetic characteristics, but their response to environmental stress is still uncertain, with some studies showing that transgressive performance would be common. Prosopis chilensis and Prosopis flexuosa are the most important tree species from Arid Chaco, South-America. Both species occupy different ecological niches in terms of water availability. Genetic and morphological studies have demonstrated the existence of interspecific hybrids in contact areas between these species. Hybrids are characterized by clear intermediate morphological characteristics, which have taxonomical value, and genetic structure compared to both parental species. We studied mechanisms implicated in drought stress tolerance in seedlings of P. chilensis, P. flexuosa and their interspecific hybrids trying to elucidate if hybrids have a morpho-physiological, growth and survival intermediate response to drought compared to differential parental responses or if they out-perform both parental species when subjected to drought. Our results suggest that hybridization does not result in individuals with intermediate mechanisms related to drought resistance, but with a unique trait combination leading to high growth when water availability is high (similar to the most vulnerable parental species) and high survival under drought stress (similar to the more resistant parental species). Certain uncoupling between symplastic and apoplastic resistence to drought was observed in hybrids, as well as decreased physiological-wood anatomical plasticity compared to parental species. The long-term consequences in terms of adaptive response to drought of this particular trait combination of hybrids remain still unknown. |
| format | Artículo |
| id | INTA3731 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | INTA37312018-10-29T15:05:42Z Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids Lopez Lauenstein, Diego Fernandez, María Elena Verga, Anibal Prosopis Chilensis Resistencia a la Sequía Estrés de Sequia Plasticidad Fenotípica Hibridación Drought Resistance Drought Stress Phenotypic Plasticity Hybridization Prosopis Flexuosa Natural hybridization commonly produces individuals with intermediate morphological and genetic characteristics, but their response to environmental stress is still uncertain, with some studies showing that transgressive performance would be common. Prosopis chilensis and Prosopis flexuosa are the most important tree species from Arid Chaco, South-America. Both species occupy different ecological niches in terms of water availability. Genetic and morphological studies have demonstrated the existence of interspecific hybrids in contact areas between these species. Hybrids are characterized by clear intermediate morphological characteristics, which have taxonomical value, and genetic structure compared to both parental species. We studied mechanisms implicated in drought stress tolerance in seedlings of P. chilensis, P. flexuosa and their interspecific hybrids trying to elucidate if hybrids have a morpho-physiological, growth and survival intermediate response to drought compared to differential parental responses or if they out-perform both parental species when subjected to drought. Our results suggest that hybridization does not result in individuals with intermediate mechanisms related to drought resistance, but with a unique trait combination leading to high growth when water availability is high (similar to the most vulnerable parental species) and high survival under drought stress (similar to the more resistant parental species). Certain uncoupling between symplastic and apoplastic resistence to drought was observed in hybrids, as well as decreased physiological-wood anatomical plasticity compared to parental species. The long-term consequences in terms of adaptive response to drought of this particular trait combination of hybrids remain still unknown. Instituto de Fisiología y Recursos Genéticos Vegetales Fil: Lopez Lauenstein, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Fernandez, María Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Grupo de Ecología Forestal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Verga, Anibal. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina 2018-10-29T15:00:33Z 2018-10-29T15:00:33Z 2013-02 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/3731 https://link.springer.com/article/10.1007/s00468-012-0798-0#citeas 0931-1890 1432-2285 (Online) https://doi.org/10.1007/s00468-012-0798-0 eng info:eu-repo/semantics/restrictedAccess application/pdf Springer Trees 27 (1) : 285–296. (February 2013) |
| spellingShingle | Prosopis Chilensis Resistencia a la Sequía Estrés de Sequia Plasticidad Fenotípica Hibridación Drought Resistance Drought Stress Phenotypic Plasticity Hybridization Prosopis Flexuosa Lopez Lauenstein, Diego Fernandez, María Elena Verga, Anibal Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids |
| title | Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids |
| title_full | Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids |
| title_fullStr | Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids |
| title_full_unstemmed | Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids |
| title_short | Drought stress tolerance of Prosopis chilensis and Prosopis flexuosa species and their hybrids |
| title_sort | drought stress tolerance of prosopis chilensis and prosopis flexuosa species and their hybrids |
| topic | Prosopis Chilensis Resistencia a la Sequía Estrés de Sequia Plasticidad Fenotípica Hibridación Drought Resistance Drought Stress Phenotypic Plasticity Hybridization Prosopis Flexuosa |
| url | http://hdl.handle.net/20.500.12123/3731 https://link.springer.com/article/10.1007/s00468-012-0798-0#citeas https://doi.org/10.1007/s00468-012-0798-0 |
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