Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar
Rhodes grass (Chloris gayana Kunth) is widely cultivated in the semi-arid tropics and favoured for salt tolerance; nevertheless, productivity decreases significantly under saline conditions, especially in tetraploid cultivars. The purpose of this work was to explore, in the tetraploid cultivar Boma,...
| Autores principales: | , , , , , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
CSIRO Publishing
2020
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/7456 https://www.publish.csiro.au/cp/AR00190 https://doi.org/10.1071/AR00190 |
| _version_ | 1855035862080815104 |
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| author | De Luca, Marcos Javier García Seffino, L. Grunberg, Karina Salgado, M. Córdoba, Alicia R. Luna, Celina Mercedes Ortega, Leandro Ismael Rodriguez, Andrés Alberto Castagnaro, Ana P. Taleisnik, Edith |
| author_browse | Castagnaro, Ana P. Córdoba, Alicia R. De Luca, Marcos Javier García Seffino, L. Grunberg, Karina Luna, Celina Mercedes Ortega, Leandro Ismael Rodriguez, Andrés Alberto Salgado, M. Taleisnik, Edith |
| author_facet | De Luca, Marcos Javier García Seffino, L. Grunberg, Karina Salgado, M. Córdoba, Alicia R. Luna, Celina Mercedes Ortega, Leandro Ismael Rodriguez, Andrés Alberto Castagnaro, Ana P. Taleisnik, Edith |
| author_sort | De Luca, Marcos Javier |
| collection | INTA Digital |
| description | Rhodes grass (Chloris gayana Kunth) is widely cultivated in the semi-arid tropics and favoured for salt tolerance; nevertheless, productivity decreases significantly under saline conditions, especially in tetraploid cultivars. The purpose of this work was to explore, in the tetraploid cultivar Boma, the physiological causes for such decrease. Experiments were carried out in vegetative plants in the greenhouse. At high salinity (200 mM NaCl), an early reduction in leaf area expansion was observed, and, later, decreased dry matter accumulation, suggesting that the central effect of salinity was a limitation of leaf growth. This was evaluated in 2 closely related Boma clones, exhibiting different degrees of salt tolerance. Growth, ion accumulation and excretion, sugars, and proline concentrations were measured under a range of salt concentrations (0–200 mM NaCl). Differences between the clones in leaf expansion were expressed only at high salinity, but were not associated with differences in water potential or hydraulic conductance in the expanding region. At all salinity levels, the proportion of dry leaves was higher in the clone which also had lower salt gland density and Na excretion rates. Less efficient Na extrusion, associated with high oxidative stress, may be the main cause for leaf senescence and differences in productivity between these clones. |
| format | info:ar-repo/semantics/artículo |
| id | INTA7456 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | CSIRO Publishing |
| publisherStr | CSIRO Publishing |
| record_format | dspace |
| spelling | INTA74562020-06-23T12:23:31Z Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar De Luca, Marcos Javier García Seffino, L. Grunberg, Karina Salgado, M. Córdoba, Alicia R. Luna, Celina Mercedes Ortega, Leandro Ismael Rodriguez, Andrés Alberto Castagnaro, Ana P. Taleisnik, Edith Chloris gayana Variedades Salinidad Variación Genética Productividad Varieties Salinity Genetic Variation Productivity Grama Rhodes Rhodes Grass Rhodes grass (Chloris gayana Kunth) is widely cultivated in the semi-arid tropics and favoured for salt tolerance; nevertheless, productivity decreases significantly under saline conditions, especially in tetraploid cultivars. The purpose of this work was to explore, in the tetraploid cultivar Boma, the physiological causes for such decrease. Experiments were carried out in vegetative plants in the greenhouse. At high salinity (200 mM NaCl), an early reduction in leaf area expansion was observed, and, later, decreased dry matter accumulation, suggesting that the central effect of salinity was a limitation of leaf growth. This was evaluated in 2 closely related Boma clones, exhibiting different degrees of salt tolerance. Growth, ion accumulation and excretion, sugars, and proline concentrations were measured under a range of salt concentrations (0–200 mM NaCl). Differences between the clones in leaf expansion were expressed only at high salinity, but were not associated with differences in water potential or hydraulic conductance in the expanding region. At all salinity levels, the proportion of dry leaves was higher in the clone which also had lower salt gland density and Na excretion rates. Less efficient Na extrusion, associated with high oxidative stress, may be the main cause for leaf senescence and differences in productivity between these clones. Instituto de Fisiología y Recursos Genéticos Vegetales Fil: De Luca, Marcos Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina Fil: García Seffino, L. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina Fil: Grunberg, Karina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina Fil: Salgado, M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina Fil: Córdoba, Alicia R. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina Fil: Luna, Celina Mercedes. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina Fil: Ortega, Leandro Ismael. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina Fil: Rodriguez, Andrés Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina Fil: Castagnaro, Ana P. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina Fil: Taleisnik, Edith. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales (ex IFFIVE); Argentina 2020-06-23T12:17:21Z 2020-06-23T12:17:21Z 2001 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/7456 https://www.publish.csiro.au/cp/AR00190 0004-9409 https://doi.org/10.1071/AR00190 eng info:eu-repo/semantics/restrictedAccess application/pdf CSIRO Publishing Australian Journal of Agricultural Research 52 (9) : 903–910 (2001) |
| spellingShingle | Chloris gayana Variedades Salinidad Variación Genética Productividad Varieties Salinity Genetic Variation Productivity Grama Rhodes Rhodes Grass De Luca, Marcos Javier García Seffino, L. Grunberg, Karina Salgado, M. Córdoba, Alicia R. Luna, Celina Mercedes Ortega, Leandro Ismael Rodriguez, Andrés Alberto Castagnaro, Ana P. Taleisnik, Edith Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar |
| title | Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar |
| title_full | Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar |
| title_fullStr | Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar |
| title_full_unstemmed | Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar |
| title_short | Physiological causes for decreased productivity under high salinity in Boma, a tetraploid Chloris gayana cultivar |
| title_sort | physiological causes for decreased productivity under high salinity in boma a tetraploid chloris gayana cultivar |
| topic | Chloris gayana Variedades Salinidad Variación Genética Productividad Varieties Salinity Genetic Variation Productivity Grama Rhodes Rhodes Grass |
| url | http://hdl.handle.net/20.500.12123/7456 https://www.publish.csiro.au/cp/AR00190 https://doi.org/10.1071/AR00190 |
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