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Deciphering variations of phloem and xylem sap metabolite profiles in response to N availability in Arabidopsis accessions

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Academic year: 2021

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HAL Id: hal-02734019

https://hal.inrae.fr/hal-02734019

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Deciphering variations of phloem and xylem sap metabolite profiles in response to N availability in

Arabidopsis accessions

Sylvie Dinant, Federica de Marco, Nelly Wolff, Rozenn Le Hir, Catherine Bellini, Françoise Vilaine, Priscilla Montfalet, Anne Marmagne, Fabien

Chardon, Marie-Laure Magniette

To cite this version:

Sylvie Dinant, Federica de Marco, Nelly Wolff, Rozenn Le Hir, Catherine Bellini, et al.. Deciphering variations of phloem and xylem sap metabolite profiles in response to N availability in Arabidopsis accessions. Symposium Plant Signaling and Development, Dec 2018, Daegu, South Korea. �hal- 02734019�

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Symposium

"Signalling and Development in Plants" Dec 17th, at DGIST, Daegu, Korea.

Deciphering variations of phloem and xylem sap metabolite profiles in response to N availability in Arabidopsis accessions.

Sylvie Dinant

a,*

, Federica De Marco

a, b

, Nelly Wolff

a

, Rozenn le Hir

a

, Catherine Bellini

a

, Francoise Vilaine

a

, Priscilla Monfalet

c

, Anne Marmagne

a

, Fabien Chardon

a

, Marie-Laure Martin-Magniette

c,d

a

Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78000 Versailles, France

b

Plateforme de Chimie du Végétal (PFCV), UMR1318, INRA F-78000, Versailles, France

c

Institute of Plant Sciences - Paris Saclay (IPS2), INRA-CNRS-Université Paris-Sud, Saclay Plant Science LabEx, Orsay, France, CNRS UMR8114, INRA UMR1165, Université d'Evry Val d'Essonne, Evry, France, Mathématiques et Informatiques Appliquées, AgroParisTech, INRA UMR518, Paris, France

Abstract

The allocation of carbon (C) and nitrogen (N) in higher plants results from the long-distance transport between shoot and roots of a range of metabolites, including carbohydrates, amino acids and organic acids. This highly integrative process also participates in plant adaptation to mineral availability. To unravel the metabolic and transport pathways involved in carbon allocation, we exploited the natural variation within Arabidopsis thaliana to analyze the translocation of organic C and N in the phloem and xylem. A metabolome profiling of the phloem and xylem saps was carried out in five natural accessions grown in plethoric or limiting N supply. The organization of the vascular tissues in the petiole and the stem were also analyzed. As expected, the nutritional regimes explained most of the variability.

However, we also observed significant variations due to the genotypes, with some interaction effects due to nutrition. This study revealed different strategies in C and N transport

depending on the accessions and showed an unexpected important role of organic acids in

long distance allocation of nutrients.

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