Les séminaires ont lieu sur le Campus Montpellier SupAgro/INRA de La Gaillarde (2, place P. Viala Montpellier)
Jeudi 10 septembre 2015
Amphi 206 (cœur d’Ecole) à 14h
Molecular mechanisms underlying arsenic perception in plants
Departments of aPlant Molecular Genetics. Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Cientificas, Madrid
Arsenic has been a major challenge for organism survival since life inception. In plants, the mechanisms underlying arsenic response are mostly unknown. Arsenate is the most abundant chemical form of arsenic and based on its similarity with phosphate, it is easily incorporated into cells through the phosphate transporters. In plants,once arsenate is perceived, the phosphate transporters are rapidly downregulated. This response exerts a particular dilemma for plants; to suffer a phosphate starvation condition, or to be arsenic intoxicated. In order to withstand this particular situation, plants adapt the expression of arsenate /phosphate transporters to the detoxification capacity through the action of phytohormones. Here we will present our results to understand the molecular mechanisms underlying this coordinated response. In addition, I will present our recent data exploring natural variation in arsenic tolerance in Arabidopsis thaliana.
Contact : Hatem Rouached