IBIP seminar

Thursday, October 6, 2016

Yin and Yang of wall integrity signaling

Herman Höfte
Institut Jean-Pierre Bourgin, INRA, AgroParisTech, Versailles, France

The cell wall of growing plant cells accomplishes a remarkable feat, resisting to very high tensional stresses imposed by the high turgor pressure of up to 10 bars, while maintaining the ability to extend. Cell wall strength is determined by the cross links between cell wall polymers, whereas cell wall extensibility reflects the ability to remove and recreate these crosslinks. Recent studies have revealed the existence of feedback signalling networks that control the chemorheological processes underlying the mechanical homeostasis of the walls of growing cells. In this presentation I will first discuss some recent insights into the architecture of plant cell walls in particular the role of pectins as part of a load-bearing network. I will then discuss how receptor kinases of the CrRLKL1 family are part of a regulatory module involved in a feedback regulatory loop that senses cell wall properties and triggers wall stiffening upon wall damage. These modules play a role in normal growth and development and in the response to abiotic and biotic stresses.

Contact : Christophe Maurel

Contacts IBIP :
Sabine Zimmermann
Alexandre Martiniere
Christine Granier
Chantal Baracco