Les séminaires ont lieu sur le Campus Montpellier SupAgro/INRA de La Gaillarde (2, place P. Viala Montpellier)
Jeudi 30 mai 2013
Salle 104 (Château) à 14h
Functional organization and developmental dynamics of the Arabidopsis epigenome zinc homeostasis and metal research at Wageningen University
Mark G.M. Aarts
Université de Wageningen, Pays-Bas
In my group we are interested in studying natural genetic variation, trying to understand the mechanisms underlying evolution of adaptation to adverse abiotic conditions, such as drought, light fluctuations related to photosynthesis, and nutrient deficiencies (N, P and Zn) or excess (Cd). For most of this work we use Arabidopsis thaliana, but we are also interested in related species, such as Brassica rapa and the metal hyperaccumulator Noccaea caerulescens. Recently we also started to work with another metallophyte, the novel bioindicator Gomphrena elegans. For genetic analysis of abiotic stress adaptation in Arabidopsis thaliana, we have often used QTL analysis of recombinant inbred line populations, but recently we moved to using genome wide association (GWA) analysis to complement traditional QTL analysis. In my presentation I will focus on the work we do on Arabidopsis thaliana to study Zn deficiency tolerance, mainly as follow up of our identification a few years ago of two bZIP transcription factors that are essential for the first response to Zn deficiency, and on our progress in GWA analysis of Zn deficiency tolerance. In addition, I will discuss our first attempts to unravel the physiology and molecular genetics of the novel South-American Zn/Cd bioindicator Gomphrena elegans, and the on-going development of Noccaea caerulescens as a primary model Zn/Cd/Ni hyperaccumulator, including our progress on whole genome sequencing and population resequencing.
Contact : Hatem Rouached