A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation
In annual crops such as maize, assimilates demand exerted by grains converges with increasing leaf senescence. As sink demand changes as grains growth, leaf senescence could also be affected during the grain filling period. In this work, we evaluated the effect of a decrease in sinks demand at diffe...
| Autores principales: | , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2024
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/16827 https://www.sciencedirect.com/science/article/pii/S1161030123002952 https://doi.org/10.1016/j.eja.2023.127027 |
| _version_ | 1855037563071365120 |
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| author | Dosio, Guillermo Cicore, Pablo Leandro Rizzalli, Roberto Héctor |
| author_browse | Cicore, Pablo Leandro Dosio, Guillermo Rizzalli, Roberto Héctor |
| author_facet | Dosio, Guillermo Cicore, Pablo Leandro Rizzalli, Roberto Héctor |
| author_sort | Dosio, Guillermo |
| collection | INTA Digital |
| description | In annual crops such as maize, assimilates demand exerted by grains converges with increasing leaf senescence. As sink demand changes as grains growth, leaf senescence could also be affected during the grain filling period. In this work, we evaluated the effect of a decrease in sinks demand at different moments of the grain filling period on maize leaf senescence. Sinks were modified in field experimentation via restriction of pollination or ear removal at four different times during the grain filling period. These growth and senescence-related-variables were periodically assessed: dry matter, stem carbohydrates, leaf initiation, leaf area, chlorophyll, sap flow and photosynthesis. Restriction of pollination and ear removal increased stem carbohydrates concentration and stem dry matter. Leaf senescence was accelerated only when ear was removed at R3 and R4 phenological stages. The magnitude of the effect was leaf position-dependent. A simple model relating leaf area duration or the area under the chlorophyll evolution curve with leaves age accounted for the observed results. Protecting grains during this window would avoid a decrease in grain yield both due to direct damage to the grains and the source reduction for advanced leaf senescence. These results would be of interest to producers, breeders and modelers of this crop. |
| format | info:ar-repo/semantics/artículo |
| id | INTA16827 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA168272024-02-28T14:39:24Z A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation Dosio, Guillermo Cicore, Pablo Leandro Rizzalli, Roberto Héctor Maíz Granos Hojas Envejecimiento Maize Grain Leaves Ageing Seed Filling Hinchamiento de la Semilla Llenado de Grano In annual crops such as maize, assimilates demand exerted by grains converges with increasing leaf senescence. As sink demand changes as grains growth, leaf senescence could also be affected during the grain filling period. In this work, we evaluated the effect of a decrease in sinks demand at different moments of the grain filling period on maize leaf senescence. Sinks were modified in field experimentation via restriction of pollination or ear removal at four different times during the grain filling period. These growth and senescence-related-variables were periodically assessed: dry matter, stem carbohydrates, leaf initiation, leaf area, chlorophyll, sap flow and photosynthesis. Restriction of pollination and ear removal increased stem carbohydrates concentration and stem dry matter. Leaf senescence was accelerated only when ear was removed at R3 and R4 phenological stages. The magnitude of the effect was leaf position-dependent. A simple model relating leaf area duration or the area under the chlorophyll evolution curve with leaves age accounted for the observed results. Protecting grains during this window would avoid a decrease in grain yield both due to direct damage to the grains and the source reduction for advanced leaf senescence. These results would be of interest to producers, breeders and modelers of this crop. EEA Balcarce Fil: Dosio, Guillermo. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Instituto de Innovación para el Desarrollo Agroalimentario y Agroenergético Sostenible; Argentina. Fil: Dosio, Guillermo. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Fil: Cicore, Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Fil: Cicore, Pablo. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Fil: Rizzalli, Roberto. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. 2024-02-28T14:27:57Z 2024-02-28T14:27:57Z 2024-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/16827 https://www.sciencedirect.com/science/article/pii/S1161030123002952 1161-0301 (Print) 1873-7331 (Online) https://doi.org/10.1016/j.eja.2023.127027 eng info:eu-repo/semantics/restrictedAccess 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 Elsevier European Journal of Agronomy 152 : 127027 (January 2024) |
| spellingShingle | Maíz Granos Hojas Envejecimiento Maize Grain Leaves Ageing Seed Filling Hinchamiento de la Semilla Llenado de Grano Dosio, Guillermo Cicore, Pablo Leandro Rizzalli, Roberto Héctor A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation |
| title | A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation |
| title_full | A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation |
| title_fullStr | A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation |
| title_full_unstemmed | A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation |
| title_short | A time-window within the grain filling period accounted for early leaf senescence in maize under sink limitation |
| title_sort | time window within the grain filling period accounted for early leaf senescence in maize under sink limitation |
| topic | Maíz Granos Hojas Envejecimiento Maize Grain Leaves Ageing Seed Filling Hinchamiento de la Semilla Llenado de Grano |
| url | http://hdl.handle.net/20.500.12123/16827 https://www.sciencedirect.com/science/article/pii/S1161030123002952 https://doi.org/10.1016/j.eja.2023.127027 |
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