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A RhoGDP dissociation inhibitor spatially regulates growth in root hair cells
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SYSNO ASEP 0030550 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title A RhoGDP dissociation inhibitor spatially regulates growth in root hair cells Title RhoGDP disociační inhibitor prostorově reguluje růst kořenového vlášení Author(s) Carol, R.J. (FR)
Takeda, S. (CH)
Linstead, P. (US)
Durrant, M.C. (FR)
Toupalová, Hana (UEB-Q)
Derbyshire, P. (GB)
Drea, S. (GB)
Žárský, Viktor (UEB-Q) RID, ORCID
Dolan, L. (GB)Source Title Nature. - : Palgrave Macmillan - ISSN 0028-0836
Roč. 438, č. 7070 (2005), s. 1013-1016Number of pages 4 s. Language eng - English Country GB - United Kingdom Keywords NADPH OXIDASE ; MEDICAGO-TRUNCATULA ; TIP GROWTH Subject RIV EB - Genetics ; Molecular Biology R&D Projects GA204/02/1461 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50380511 - UEB-Q (2005-2011) Annotation Root hairs are cellular protuberances extending from the root surface into the soil; there they provide access to immobile inorganic ions such as phosphate, which are essential for growth(1). Their cylindrical shape results from a polarized mechanism of cell expansion called tip growth in which elongation is restricted to a small area at the surface of the hair-forming cell (trichoblast) tip(2-4). Here we identify proteins that spatially control the sites at which cell growth occurs by isolating Arabidopsis mutants (scn1) that develop ectopic sites of growth on trichoblasts. We cloned SCN1 and showed that SCN1 is a RhoGTPase GDP dissociation inhibitor ( RhoGDI) that spatially restricts the sites of growth to a single point on the trichoblast. We showed previously that localized production of reactive oxygen species by RHD2/AtrbohC NADPH oxidase is required for hair growth(5); here we show that SCN1/AtrhoGDI1 is a component of the mechanism that focuses RHD2/AtrbohC-catalysed production of reactive oxygen species to hair tips during wild-type development. We propose that the spatial organization of growth in plant cells requires the local RhoGDI-regulated activation of the RHD2/AtrbohC NADPH oxidase. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2006
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