Séminaire de Françoise HENNION



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Le vendredi 3 mars 2017 à 13h00, salle de conférences de l'OSUR, bâtiment 14b, Campus de Beaulieu, UR1

Le vendredi 3 mars 2017 à 13h00, salle de conférences de l'OSUR, bâtiment 14b, Campus de Beaulieu, UR1

Variations of secondary metabolites among natural populations in sub-Antarctic Ranunculus species suggest functional redundancy and versatility

Abstract :
The metabolome is known to be shaped by both phylogeny and environment, and to interact with the phenotype. While macroevolution of genes is being more and more deciphered, very little is known about microevolution of the metabolome, for instance the intraspecific variation of the metabolome in nature within and among populations and regions. Microevolution among distant regions might affect the relation between metabolites and environments or phenotypes.We studied populations of three Ranunculus species distributed across two similar environmental gradients in two distinct geographical regions in Iles Kerguelen. We used two metabolite classes, quercetins and amines, both known to respond to stresses and aminesalso known as growth regulators. We found both environment-dependent and environmentindependent variation of metabolites (amines or quercetins) among populations. Furthermore, depending on regions, different metabolites may be related to the same environment or the same trait. Our results suggest that metabolites may be functionally redundant and versatile within species, both in their response to environments or in their relation with the phenotype.
Contact : Françoise HENNION
Seminaire  GEE 030317




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