Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level
Plants under water deficit reduce leaf growth, thereby reducing transpiration rate at the expense of reduced photosynthesis. The objective of this work was to analyse the response of leaf growth to water deficit in several sunflower genotypes in order to identify and quantitatively describe sources...
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| Format: | Artículo |
| Language: | Inglés |
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Oxford Academic Press
2019
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| Online Access: | https://academic.oup.com/jxb/article/59/8/2221/499132 http://hdl.handle.net/20.500.12123/6482 https://doi.org/10.1093/jxb/ern087 |
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| author | Pereyra Irujo, Gustavo Adrian Velazquez, Luciano Lechner, Leandra Aguirrezabal, Luis |
| author_browse | Aguirrezabal, Luis Lechner, Leandra Pereyra Irujo, Gustavo Adrian Velazquez, Luciano |
| author_facet | Pereyra Irujo, Gustavo Adrian Velazquez, Luciano Lechner, Leandra Aguirrezabal, Luis |
| author_sort | Pereyra Irujo, Gustavo Adrian |
| collection | INTA Digital |
| description | Plants under water deficit reduce leaf growth, thereby reducing transpiration rate at the expense of reduced photosynthesis. The objective of this work was to analyse the response of leaf growth to water deficit in several sunflower genotypes in order to identify and quantitatively describe sources of genetic variability for this trait that could be used to develop crop varieties adapted to specific scenarios. The genetic variability of the response of leaf growth to water deficit was assessed among 18 sunflower (Helianthus annuus L.) inbred lines representing a broad range of genetic diversity. Plants were subjected to long-term, constant-level, water-deficit treatments, and the response to water deficit quantified by means of growth models at cell-, leaf-, and plant-scale. Significant variation among lines was found for the response of leaf expansion rate and of leaf growth duration, with an equal contribution of these responses to the variability in the reduction of leaf area. Increased leaf growth duration under water deficit is usually suggested to be caused by changes in the activity of cell-wall enzymes, but the present results suggest that the duration of epidermal cell division plays a key role in this response. Intrinsic genotypic responses of rate and duration at a cellular scale were linked to genotypic differences in whole-plant leaf area profile to water deficit. The results suggest that rate and duration responses are the result of different physiological mechanisms, and therefore capable of being combined to increase the variability in leaf area response to water deficit. |
| format | Artículo |
| id | INTA6482 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Oxford Academic Press |
| publisherStr | Oxford Academic Press |
| record_format | dspace |
| spelling | INTA64822019-12-11T12:25:26Z Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level Pereyra Irujo, Gustavo Adrian Velazquez, Luciano Lechner, Leandra Aguirrezabal, Luis Helianthus Annuus Variación Genética Relaciones Planta Agua Potencial Hídrico Foliar Genetic Variation Plant Water Relations Leaf Water Potential Girasol Déficit Hídrico Sunflower Plants under water deficit reduce leaf growth, thereby reducing transpiration rate at the expense of reduced photosynthesis. The objective of this work was to analyse the response of leaf growth to water deficit in several sunflower genotypes in order to identify and quantitatively describe sources of genetic variability for this trait that could be used to develop crop varieties adapted to specific scenarios. The genetic variability of the response of leaf growth to water deficit was assessed among 18 sunflower (Helianthus annuus L.) inbred lines representing a broad range of genetic diversity. Plants were subjected to long-term, constant-level, water-deficit treatments, and the response to water deficit quantified by means of growth models at cell-, leaf-, and plant-scale. Significant variation among lines was found for the response of leaf expansion rate and of leaf growth duration, with an equal contribution of these responses to the variability in the reduction of leaf area. Increased leaf growth duration under water deficit is usually suggested to be caused by changes in the activity of cell-wall enzymes, but the present results suggest that the duration of epidermal cell division plays a key role in this response. Intrinsic genotypic responses of rate and duration at a cellular scale were linked to genotypic differences in whole-plant leaf area profile to water deficit. The results suggest that rate and duration responses are the result of different physiological mechanisms, and therefore capable of being combined to increase the variability in leaf area response to water deficit. EEA Balcarce Fil: Pereyra Irujo, Gustavo Adrian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Unidad Integrada. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Velazquez, Luciano. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Unidad Integrada. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Lechner, Leandra. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Unidad Integrada. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Fil: Aguirrezábal, Luis Adolfo Nazareno. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Unidad Integrada. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. 2019-12-11T12:21:56Z 2019-12-11T12:21:56Z 2008-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://academic.oup.com/jxb/article/59/8/2221/499132 http://hdl.handle.net/20.500.12123/6482 0022-0957 1460-2431 https://doi.org/10.1093/jxb/ern087 eng 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 Oxford Academic Press Journal of Experimental Botany 59 (8) : 2221–2232 (May 2008) |
| spellingShingle | Helianthus Annuus Variación Genética Relaciones Planta Agua Potencial Hídrico Foliar Genetic Variation Plant Water Relations Leaf Water Potential Girasol Déficit Hídrico Sunflower Pereyra Irujo, Gustavo Adrian Velazquez, Luciano Lechner, Leandra Aguirrezabal, Luis Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level |
| title | Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level |
| title_full | Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level |
| title_fullStr | Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level |
| title_full_unstemmed | Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level |
| title_short | Genetic variability for leaf growth rate and duration under water deficit in sunflower: analysis of responses at cell, organ, and plant level |
| title_sort | genetic variability for leaf growth rate and duration under water deficit in sunflower analysis of responses at cell organ and plant level |
| topic | Helianthus Annuus Variación Genética Relaciones Planta Agua Potencial Hídrico Foliar Genetic Variation Plant Water Relations Leaf Water Potential Girasol Déficit Hídrico Sunflower |
| url | https://academic.oup.com/jxb/article/59/8/2221/499132 http://hdl.handle.net/20.500.12123/6482 https://doi.org/10.1093/jxb/ern087 |
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