W. SNEDDEN - Calcium signaling in plant development and stress response

Résumé de son intervention :

My research program is directed at understanding how plants use calcium ions to regulate so many different physiological processes. Ideal growth environments are likely nonexistent in the natural world, and variations in the degree of sub-optimal conditions require responses that range from fine-tuning cell activity to massive changes in architecture, growth, and metabolism. Stress-response, including that directed by calcium signaling, can thus be considered an ongoing component of development. Given the richness of calcium signaling in plants, it is perhaps no surprise that they have evolved an expansive and unique repertoire of calcium-binding proteins (sensors) to interpret calcium signals.  I will present biochemical, physiological, and genetic data from our lab describing the role of novel calcium-binding proteins from Arabidopsis and their roles in processes as varied as wound response, trichome branching, pathogen response, seedling development, and seed germination.  Collectively, our data underscore the complexity of calcium signal transduction in plants and highlight the need for more research to bridge the stress/developmental divide

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