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Impact of crop load on nitrogen uptake and reserve mobilisation in Vitis vinifera

dc.rights.licenseopenen_US
dc.contributor.authorVERDENAL, Thibaut
dc.contributor.authorSPANGENBERG, Jorge
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorZUFFEREY, Vivian
dc.contributor.authorDIENES-NAGY, Ágnes
dc.contributor.authorVIRET, Olivier
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorVAN LEEUWEN, Cornelis
ORCID: 0000-0002-9428-0167
IDREF: 200518208
dc.contributor.authorSPRING, Jean-Laurent
dc.date.accessioned2020-09-11T12:48:54Z
dc.date.available2020-09-11T12:48:54Z
dc.date.issued2020
dc.identifier.issn1445-4408en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/11303
dc.description.abstractEnNitrogen deficit affects both crop production and composition, particularly in crops requiring an optimal fruit N content for aroma development. The adaptation of cultural practices to improve N use efficiency (NUE) (i.e. N uptake, assimilation and partitioning) is a priority for the sustainable production of high-quality crops. A trial was set on potted grapevines (Vitis vinifera L. cv. Chasselas) to investigate the potential of crop limitation (via bunch thinning) to control plant NUE and ultimately fruit N composition at harvest. A large crop load gradient was imposed by bunch thinning (0.5-2.5 kg m(-2)) and N traceability in the plant was realised with an isotope-labelling method (10 atom % N-15 foliar urea). The results indicate that the mobilisation of root reserves plays a major role in the balance of fruit N content. Fertiliser N uptake and assimilation appeared to be strongly stimulated by high-yielding conditions. Fertilisation largely contributed to fulfilling the high fruit N demand while limiting the mobilisation of root reserves under high yield conditions. Plants were able to modulate root N reserve mobilisation and fertiliser N uptake in function of the crop load, thus maintaining a uniform N concentration in fruits. However, the fruit free amino N profile was modified, which potentially altered the fruit aromas. These findings highlight the great capacity of plants to adapt their N metabolism to constraints, crop thinning in this case. This confirms the possibility of monitoring NUE by adapting cultural practices.
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by-sa/
dc.subject.enCrop thinning
dc.subject.enFoliar urea
dc.subject.enGrapevine
dc.subject.enIsotope labelling
dc.subject.enN partitioning
dc.subject.enReserve mobilisation
dc.title.enImpact of crop load on nitrogen uptake and reserve mobilisation in Vitis vinifera
dc.typeArticle de revueen_US
dc.identifier.doi10.1071/FP20010en_US
dc.subject.halSciences de l'environnementen_US
dc.subject.halSciences du Vivant [q-bio]en_US
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
bordeaux.journalFunctional Plant Biologyen_US
bordeaux.page744-756en_US
bordeaux.volume47en_US
bordeaux.hal.laboratoriesEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV) - UMR 1287en_US
bordeaux.issue8en_US
bordeaux.institutionBordeaux Sciences Agroen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02904483
hal.version1
hal.exportfalse
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