Bioscience and Biotechnology Institute of Aix-Marseille
In natural conditions, plants are permanently exposed to changing environment due to variations in temperature, light intensity and water availability, or apparition of pathogens. These constraints impair cell metabolism and photosynthetic activity, and consequently lead to growth limitation and decreased yield for cultivated species.
Plants have evolved multiple responses allowing them to adapt to their changing environment. We study the functions of protein actors in stress signalization, and in prevention or repair of damage in relation with redox homeostasis. Environmental constraints are generally associated with a production of reactive oxygen species, which play key functions in standard conditions, but at high level lead to oxidative stress and damage in macromolecules and cell structures.
To carry out this research in integrative plant physiology, we implement a multidisciplinary strategy based on biophysical, biochemical, molecular, genetic, proteomic and imaging approaches, using mainly the plant model Arabidopsis thaliana.
Analysis of the physiological functions of thiol reductases, enzymes controlling the redox status of proteins, in plant responses to environmental constraints.
Role of plastidial lipocalin in the protection of the photosynthetic apparatus
In guard cells, the activity of a lipoxygenase contributes to alkylation of a protein kinase and thus causes stomatal closure induced by biotic stresses.
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.