COCHETEL, Noé; METEIER, Eloïse; MERLIN, Isabelle; HEVIN, Cyril; POUVREAU, Jean-Bernard; COUTOS-THÉVENOT, Pierre; HERNOULD, Michel; VIVIN, Philippe; OLLAT, Nathalie; LAUVERGEAT, Virginie; COOKSON, Sarah

doi:10.1093/jxb/ery206

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COCHETEL, Noé
Ecophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]

METEIER, Eloïse
Ecophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]

MERLIN, Isabelle
Ecophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]

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Journal of Experimental Botany. 2018, vol. 69, n° 16, p. 4099-4112

Resumen en inglés

In grafted plants, rootstocks assure the mineral nutrition of the scion and modify its development. In this study, we show that two grapevine rootstock genotypes have different shoot branching architectures when cultivated as cuttings and that this trait is transmitted to the scion when grafted. Shoot branching plasticity in response to nitrogen supply was also studied. As strigolactones are known to have a role in the regulation of shoot development in response to nutrient availability, their involvement in the control of scion architecture by the rootstock was investigated. Functional characterization of putative grapevine strigolactone biosynthetic genes in Arabidopsis mutants or grapevine cell suspensions showed similar functions to those of Arabidopsis. Both rootstocks produced strigolactone-like compounds< Leer menos

the quantity produced in response to nitrogen treatments differed between the two rootstock genotypes and correlated with the expression of putative strigolactone biosynthetic genes. Exudation of strigolactone-like compounds by both rootstocks was closely related to the developmental pattern of the scion in grafted plants. These results suggest that differential regulation of strigolactone biosynthesis in response to nitrogen availability may contribute to the control of scion development conferred by each rootstock genotype.< Leer menos

Palabras clave

Vitis Vinifera

Greffon

Comportement de porte greffe

Processus de ramification

Apport azoté

Palabras clave en inglés

Grafting

Grapevine

Nitrogen

Rootstocks

Shoot Branching

Strigolactones