[Seminars] PSB event reminder
contact at psb.vib-ugent.be
contact at psb.vib-ugent.be
Sat Mar 10 11:10:01 CET 2012
Calendar Name: seminars
Scheduled for: Monday, March 12 2012, 11:00 - 11:30
Event text: Prof Silke Robatzek
The Sainsbury Laboratory
Norwich
UNITED KINGDOM
Details: “Plants communicating with pathogens: membranes in
motion and cellular defense”
ABSTRACT
Cell surface receptors of plant cells constitute
recognition sites to detect invading pathogens and to
active defenses. Arabidopsis FLS2 encodes the receptor
kinase for bacterial flagellin (flg22) and is required
for immunity against a broad-spectrum of potentially
pathogenic bacteria. Upon flg22 perception FLS2
accumulates at plasma membrane microdomains and is
internalized. Although receptor trafficking became a
focus of research in the past years, there is largely
nothing known about downstream molecules and regulatory
components of receptor endocytosis. I will present
quantitative high throughput confocal imaging in plants
and will discuss results from our current research,
which addresses the identity of the FLS2 endosome,
molecular components regulating FLS2 endocytosis, and
the interception of FLS2 endocytosis and flg22
signaling. These results provide good evidences for a
role of late endosomes/multivesicular bodies in plant
immunity. To further study cellular defenses we focus on
stomatal closure as a first layer of plant immunity. I
will describe approaches using high throughput confocal
imaging for the genetic dissection of stomata response
pathways, and present exciting data how pathogens
inhibit stomatal closure by interference with hormonal
signaling. Altogether, these studies allow us to better
understand the molecular mechanisms underlying the
subcellular changes in plant-pathogen interactions.
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