CASDEV

The role of Casparian Strip formation and degradation in primary and lateral root development

Coordinatore	UNIVERSITE DE LAUSANNE    more  Organization address city: LAUSANNE postcode: 1015 contact info Titolo: Prof. Nome: Niko Cognome: Geldner Email: send email Telefono: -6924172 Fax: -6924175
Nazionalità Coordinatore	Switzerland [CH]
Totale costo	173˙065 €
EC contributo	173˙065 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2009-IEF
Funding Scheme	MC-IEF
Anno di inizio	2010
Periodo (anno-mese-giorno)	2010-07-01   -   2012-06-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITE DE LAUSANNE  Organization address city: LAUSANNE postcode: 1015 contact info Titolo: Prof. Nome: Niko Cognome: Geldner Email: send email Telefono: -6924172 Fax: -6924175	CH (LAUSANNE)	coordinator	173˙065.20

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 Obiettivo del progetto (Objective)

'Epithelial polarity is a fundamental feature of multi-cellular life and model systems for animal epithelia have been intensely investigated for decades. One tissue that displays all the hallmarks of an epithelium is the root endodermis. In plants, the endodermis functions as a crucial barrier, separating the outer apoplastic space of the cortical cell layers, often in direct contact with the soil, from the inner apoplastic space of the vascular bundle. To create this barrier, endodermal cells secrete hydrophobic material in a highly localized and coordinated manner at all four lateral sides of the cell, resulting in the formation of the “Casparian Strip” (CS). Unpublished results of the host lab suggest that there is no lateral diffusion across the membrane adjacent to the CS (Casparian Strip domain, CSD) between outer and inner plasma membrane domains, further confirming the CS’s role as a barrier. Next to nothing is known about the mechanistics underlying CS formation and its role during primary root growth and lateral root emergence. For lateral root emergence, the CS has to be modified or degraded in order for the lateral root to emerge. The host lab has isolated CS-localized proteins and mutants affected in CS formation. I propose to use these markers and mutants in order to investigate the role of the CS in growth restriction primary root growth and lateral root emergence. I will use live-cell imaging combined with ultra-structural analysis to determine the developmental sequence of CS-formation and the dynamics of the CS during lateral root emergence. In parallel, I will perform micro-arrays on young, non-emerged lateral roots to identify new factors required for CS remodeling during lateral root emergence.'