Sunflower: a potential fructan-bearing crop?
Grain filling in sunflower (Helianthus annuus L.) mainly depends on actual photosynthesis, being the contribution of stored reserves in stems (sucrose, hexoses, and starch) rather low. Drought periods during grain filling often reduce yield. Increasing the capacity of stem to store reserves could he...
| Autores principales: | , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/1654 https://www.frontiersin.org/articles/10.3389/fpls.2015.00798/full https://doi.org/10.3389/fpls.2015.00798 |
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| author | Martínez-Noël, Giselle M. A. Dosio, Guillermo Puebla, Andrea Fabiana Insani, Ester Marina Tognetti, Jorge |
| author_browse | Dosio, Guillermo Insani, Ester Marina Martínez-Noël, Giselle M. A. Puebla, Andrea Fabiana Tognetti, Jorge |
| author_facet | Martínez-Noël, Giselle M. A. Dosio, Guillermo Puebla, Andrea Fabiana Insani, Ester Marina Tognetti, Jorge |
| author_sort | Martínez-Noël, Giselle M. A. |
| collection | INTA Digital |
| description | Grain filling in sunflower (Helianthus annuus L.) mainly depends on actual photosynthesis, being the contribution of stored reserves in stems (sucrose, hexoses, and starch) rather low. Drought periods during grain filling often reduce yield. Increasing the capacity of stem to store reserves could help to increase grain filling and yield stability in dry years. Fructans improve water uptake in soils at low water potential, and allow the storage of large amount of assimilates per unit tissue volume that can be readily remobilized to grains. Sunflower is a close relative to Jerusalem artichoke (H. tuberosus L.), which accumulates large amounts of fructan (inulin) in tubers and true stems. The reason why sunflower does not accumulate fructans is obscure. Through a bioinformatics analysis of a sunflower transcriptome database, we found sequences that are homologous to dicotyledon and monocotyledon fructan synthesis genes. A HPLC analysis of stem sugar composition revealed the presence of low amounts of 1-kestose, while a drastic enhancement of endogenous sucrose levels by capitulum removal did not promote 1-kestose accumulation. This suggests that the regulation of fructan synthesis in this species may differ from the currently best known model, mainly derived from research on Poaceae, where sucrose acts as both a signaling molecule and substrate, in the induction of fructan synthesis. Thus, sunflower might potentially constitute a fructan-bearing species, which could result in an improvement of its performance as a grain crop. However, a large effort is needed to elucidate how this up to now unsuspected potential could be effectively expressed. |
| format | info:ar-repo/semantics/artículo |
| id | INTA1654 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | INTA16542017-11-27T12:11:16Z Sunflower: a potential fructan-bearing crop? Martínez-Noël, Giselle M. A. Dosio, Guillermo Puebla, Andrea Fabiana Insani, Ester Marina Tognetti, Jorge Helianthus Annuus Tallos Fotosíntesis Stems Photosynthesis Yields Rendimiento Girasol Grain filling in sunflower (Helianthus annuus L.) mainly depends on actual photosynthesis, being the contribution of stored reserves in stems (sucrose, hexoses, and starch) rather low. Drought periods during grain filling often reduce yield. Increasing the capacity of stem to store reserves could help to increase grain filling and yield stability in dry years. Fructans improve water uptake in soils at low water potential, and allow the storage of large amount of assimilates per unit tissue volume that can be readily remobilized to grains. Sunflower is a close relative to Jerusalem artichoke (H. tuberosus L.), which accumulates large amounts of fructan (inulin) in tubers and true stems. The reason why sunflower does not accumulate fructans is obscure. Through a bioinformatics analysis of a sunflower transcriptome database, we found sequences that are homologous to dicotyledon and monocotyledon fructan synthesis genes. A HPLC analysis of stem sugar composition revealed the presence of low amounts of 1-kestose, while a drastic enhancement of endogenous sucrose levels by capitulum removal did not promote 1-kestose accumulation. This suggests that the regulation of fructan synthesis in this species may differ from the currently best known model, mainly derived from research on Poaceae, where sucrose acts as both a signaling molecule and substrate, in the induction of fructan synthesis. Thus, sunflower might potentially constitute a fructan-bearing species, which could result in an improvement of its performance as a grain crop. However, a large effort is needed to elucidate how this up to now unsuspected potential could be effectively expressed. Fil: Martínez-Noël, Giselle M. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Biotecnología; Argentina Fil: Dosio, Guillermo. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias. Laboratorio de Fisiología Vegetal; Argentina Fil: Puebla, Andrea Fabiana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina Fil: Insani, Ester Marina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina Fil: Tognetti, Jorge. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias. Laboratorio de Fisiología Vegetal; Argentina. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires; Argentina 2017-11-02T12:32:20Z 2017-11-02T12:32:20Z 2015-10 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/1654 https://www.frontiersin.org/articles/10.3389/fpls.2015.00798/full 1664-462X https://doi.org/10.3389/fpls.2015.00798 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 Frontiers in Plant Science 6 : 1-6; 798 (October 2015) |
| spellingShingle | Helianthus Annuus Tallos Fotosíntesis Stems Photosynthesis Yields Rendimiento Girasol Martínez-Noël, Giselle M. A. Dosio, Guillermo Puebla, Andrea Fabiana Insani, Ester Marina Tognetti, Jorge Sunflower: a potential fructan-bearing crop? |
| title | Sunflower: a potential fructan-bearing crop? |
| title_full | Sunflower: a potential fructan-bearing crop? |
| title_fullStr | Sunflower: a potential fructan-bearing crop? |
| title_full_unstemmed | Sunflower: a potential fructan-bearing crop? |
| title_short | Sunflower: a potential fructan-bearing crop? |
| title_sort | sunflower a potential fructan bearing crop |
| topic | Helianthus Annuus Tallos Fotosíntesis Stems Photosynthesis Yields Rendimiento Girasol |
| url | http://hdl.handle.net/20.500.12123/1654 https://www.frontiersin.org/articles/10.3389/fpls.2015.00798/full https://doi.org/10.3389/fpls.2015.00798 |
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