[Seminars] PSB event reminder

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Calendar Name: seminars
Scheduled for: Friday, September 21 2012, 14:00 - 15:30
Event text:    Dr Edouard Pesquet
	       
	       Umea Plant Science Centre
	       Department of Plant Physiology
	       Umea University
	       
	       Umea
	       SWEDEN
Details:       “Mechanisms controlling xylem vessels secondary cell
	       wall patterning and synthesis”
	       
	       ABSTRACT
	       Xylem is essential for transporting water and minerals
	       as well as for mechanical resistance of plants against
	       gravity. These key characteristics of xylem vessels are
	       enabled by three consecutive developmental events which
	       lead to	i) the development of specific secondary cell
	       walls which exhibit different type of patterned
	       thickening, ii) the programmed cell death (PCD)	to
	       hollow out the cell content and iii) the lignification
	       to reinforce and waterproof its wall for optimal sap
	       conduction. Disturbance of any of these processes
	       greatly impairs xylem vessels function. Using a novel in
	       vitro xylogenic system derived from stable Arabidopsis
	       thaliana cell lines, the mechanisms controlling xylem
	       vessel secondary cell wall patterning and synthesis are
	       studied using a combination of live-cell imaging,
	       pharmacological treatments and genetic studies. Cortical
	       microtubules, through two microtubules interacting
	       proteins MAP70-1 and MAP70-5, control the patterning of
	       xylem vessel secondary cell wall whose deposition is
	       pursued long after cell death.

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