IBIP seminar

Thursday, September 10, 2015

Molecular mechanisms underlying arsenic perception in plants

Antonio Leyva
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

Contacts IBIP :
Sabine Zimmermann
Alexandre Martiniere
Christine Granier
Chantal Baracco