Thursday, September 29, 2016
Integration of flavonoid signaling pathways and small peptides to regulate root system architecture fitness in response to the environment
Université de Lausanne, Suisse
Plants must constantly adapt to environmental pressures (higher temperatures, emergence of new pathogens), which are expected to increase in the coming decades due to climate change. Growing evidence suggests that signaling molecules such as flavonoids are involved in regulating the balance between development and environmental stress responses. In fact, flavonoids have been proposed to control root architecture and resource allocation in response to activation of the immune system, which requires the quick use of energy and primary metabolism, usually at the expense of other mechanisms such as plant growth and development. Flavonoids are a class of polyphenol molecules involved in developmental processes, such as the regulation of root system architecture; some of them inhibit polar auxin transport in several plants, resulting in the modification of plant development and others activate a small signalling peptide (phytosulfokine, PSK), related to cell proliferation. In the present project, I propose to examine how flavonoid-mediated PSK signaling cascades could be integrated to regulate root architecture in response to environmental cues.
Contact : Benjamin Péret