Show simple item record

resumen

Abstract
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 [ver mas...]
dc.contributor.authorMartínez-Noël, Giselle M. A.
dc.contributor.authorDosio, Guillermo
dc.contributor.authorPuebla, Andrea Fabiana
dc.contributor.authorInsani, Ester Marina
dc.contributor.authorTognetti, Jorge
dc.date.accessioned2017-11-02T12:32:20Z
dc.date.available2017-11-02T12:32:20Z
dc.date.issued2015-10
dc.identifier.issn1664-462X
dc.identifier.otherhttps://doi.org/10.3389/fpls.2015.00798
dc.identifier.urihttp://hdl.handle.net/20.500.12123/1654
dc.identifier.urihttps://www.frontiersin.org/articles/10.3389/fpls.2015.00798/full
dc.description.abstractGrain 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.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.rightsinfo:eu-repo/semantics/openAccesses_AR
dc.sourceFrontiers in Plant Science 6 : 1-6; 798 (October 2015)
dc.subjectHelianthus Annuuses_AR
dc.subjectTalloses_AR
dc.subjectStemseng
dc.subjectFotosíntesises_AR
dc.subjectPhotosynthesiseng
dc.subjectRendimiento
dc.subjectYieldseng
dc.subject.otherGirasol
dc.titleSunflower: a potential fructan-bearing crop?es_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.filFil: Martínez-Noël, Giselle M. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Biotecnología; Argentina
dc.description.filFil: Dosio, Guillermo. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias. Laboratorio de Fisiología Vegetal; Argentina
dc.description.filFil: Puebla, Andrea Fabiana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina
dc.description.filFil: Insani, Ester Marina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina
dc.description.filFil: 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
dc.subtypecientifico


Files in this item

Thumbnail

This item appears in the following Collection(s)

common

Show simple item record