Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size
Background and Aims: Leaves expand during a given period of time until they reach their final size and form, which is called determinate growth. Duration of leaf expansion is stable when expressed in thermal-time and in the absence of stress, and consequently it is often proposed that it is controll...
| Autores principales: | , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Oxford Academic Press
2019
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| Materias: | |
| Acceso en línea: | https://academic.oup.com/aob/article/101/7/1007/133311 http://hdl.handle.net/20.500.12123/6477 https://doi.org/10.1093/aob/mcn029 |
| _version_ | 1855035682255273984 |
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| author | Lechner, Leandra Pereyra Irujo, Gustavo Adrian Granier, Christine Aguirrezabal, Luis |
| author_browse | Aguirrezabal, Luis Granier, Christine Lechner, Leandra Pereyra Irujo, Gustavo Adrian |
| author_facet | Lechner, Leandra Pereyra Irujo, Gustavo Adrian Granier, Christine Aguirrezabal, Luis |
| author_sort | Lechner, Leandra |
| collection | INTA Digital |
| description | Background and Aims: Leaves expand during a given period of time until they reach their final size and form, which is called determinate growth. Duration of leaf expansion is stable when expressed in thermal-time and in the absence of stress, and consequently it is often proposed that it is controlled by a robust programme at the plant scale. The usual hypothesis is that growth cessation occurs when cell expansion becomes limited by an irreversible tightening of cell wall, and that leaf size is fixed once cell expansion ceases. The objective of this paper was to test whether leaf expansion could be restored by rewatering plants after a long soil water-deficit period.
Methods: Four experiments were performed on two different species (Arabidopsis thaliana and Helianthus annuus) in which the area of leaves that had apparently reached their final size was measured upon reversal of water stresses of different intensities and durations.
Key Results: Re-growth of leaves that had apparently reached their final size occurred in both species, and its magnitude depended only on the time elapsed from growth cessation to rewatering. Leaf area increased up to 186% in A. thaliana and up to 88% in H. annuus after rewatering, with respect to the leaves of plants that remained under water deficit. Re-growth was accounted for by cell expansion. Increase in leaf area represented actual growth and not only a reversible change due to increased turgor.
Conclusions: After the leaf has ceased to grow, leaf cells retain their ability to expand for several days before leaf size becomes fixed. A response window was identified in both species, during which the extent of leaf area recovery decreased with time after the ‘initial’ leaf growth cessation. These results suggest that re-growth after rewatering of leaves having apparently attained their final size could be a generalized phenomenon, at least in dicotyledonous plants. |
| format | info:ar-repo/semantics/artículo |
| id | INTA6477 |
| 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 | INTA64772019-12-09T16:06:28Z Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size Lechner, Leandra Pereyra Irujo, Gustavo Adrian Granier, Christine Aguirrezabal, Luis Helianthus Annuus Agua Water Leaf Water Potential Potencial Hídrico Foliar Arabidopsis thaliana Girasol Déficit Hídrico Sunflower Background and Aims: Leaves expand during a given period of time until they reach their final size and form, which is called determinate growth. Duration of leaf expansion is stable when expressed in thermal-time and in the absence of stress, and consequently it is often proposed that it is controlled by a robust programme at the plant scale. The usual hypothesis is that growth cessation occurs when cell expansion becomes limited by an irreversible tightening of cell wall, and that leaf size is fixed once cell expansion ceases. The objective of this paper was to test whether leaf expansion could be restored by rewatering plants after a long soil water-deficit period. Methods: Four experiments were performed on two different species (Arabidopsis thaliana and Helianthus annuus) in which the area of leaves that had apparently reached their final size was measured upon reversal of water stresses of different intensities and durations. Key Results: Re-growth of leaves that had apparently reached their final size occurred in both species, and its magnitude depended only on the time elapsed from growth cessation to rewatering. Leaf area increased up to 186% in A. thaliana and up to 88% in H. annuus after rewatering, with respect to the leaves of plants that remained under water deficit. Re-growth was accounted for by cell expansion. Increase in leaf area represented actual growth and not only a reversible change due to increased turgor. Conclusions: After the leaf has ceased to grow, leaf cells retain their ability to expand for several days before leaf size becomes fixed. A response window was identified in both species, during which the extent of leaf area recovery decreased with time after the ‘initial’ leaf growth cessation. These results suggest that re-growth after rewatering of leaves having apparently attained their final size could be a generalized phenomenon, at least in dicotyledonous plants. EEA Balcarce 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: 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: Granier, Christine. Institut National de la Recherche Agronomique. Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux; Francia 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. 2019-12-09T16:03:17Z 2019-12-09T16:03:17Z 2008-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://academic.oup.com/aob/article/101/7/1007/133311 http://hdl.handle.net/20.500.12123/6477 0305-7364 1095-8290 https://doi.org/10.1093/aob/mcn029 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 Annals of Botany 101 (7) : 1007–1015 (May 2008) |
| spellingShingle | Helianthus Annuus Agua Water Leaf Water Potential Potencial Hídrico Foliar Arabidopsis thaliana Girasol Déficit Hídrico Sunflower Lechner, Leandra Pereyra Irujo, Gustavo Adrian Granier, Christine Aguirrezabal, Luis Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size |
| title | Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size |
| title_full | Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size |
| title_fullStr | Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size |
| title_full_unstemmed | Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size |
| title_short | Rewatering Plants after a Long Water-deficit Treatment Reveals that Leaf Epidermal Cells Retain their Ability to Expand after the Leaf has Apparently Reached its Final Size |
| title_sort | rewatering plants after a long water deficit treatment reveals that leaf epidermal cells retain their ability to expand after the leaf has apparently reached its final size |
| topic | Helianthus Annuus Agua Water Leaf Water Potential Potencial Hídrico Foliar Arabidopsis thaliana Girasol Déficit Hídrico Sunflower |
| url | https://academic.oup.com/aob/article/101/7/1007/133311 http://hdl.handle.net/20.500.12123/6477 https://doi.org/10.1093/aob/mcn029 |
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