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000021002 0247_ $$2DOI$$a10.1098/rstb.2011.0240
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000021002 041__ $$aeng
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000021002 084__ $$2WoS$$aBiology
000021002 1001_ $$0P:(DE-HGF)0$$aBabé, A.$$b0
000021002 245__ $$aRepression of early lateral root initiation events by transient water deficit in barley and maize
000021002 260__ $$aLondon$$bJSTOR$$c2012
000021002 300__ $$a1534 - 1541
000021002 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000021002 440_0 $$06841$$aPhilosophical Transactions of the Royal Society of London Series B$$v367$$x0080-4622$$y1595
000021002 500__ $$aWe thank the Communaute francaise de Belgique (ARC 0510-329 grant and FRIA fellowships to A.B. and T.L.) and the Belgian Science Policy (BARN project) for financial support. We are also grateful to Nathalie Wuyts and anonymous referees for constructive comments on a former version of the manuscript.
000021002 520__ $$aThe formation of lateral roots (LRs) is a key driver of root system architecture and developmental plasticity. The first stage of LR formation, which leads to the acquisition of founder cell identity in the pericycle, is the primary determinant of root branching patterns. The fact that initiation events occur asynchronously in a very small number of cells inside the parent root has been a major difficulty in the study of the molecular regulation of branching patterns. Inducible systems that trigger synchronous lateral formation at predictable sites have proven extremely valuable in Arabidopsis to decipher the first steps of LR formation. Here, we present a LR repression system for cereals that relies on a transient water-deficit treatment, which blocks LR initiation before the first formative divisions. Using a time-lapse approach, we analysed the dynamics of this repression along growing roots and were able to show that it targets a very narrow developmental window of the initiation process. Interestingly, the repression can be exploited to obtain negative control root samples where LR initiation is absent. This system could be instrumental in the analysis of the molecular basis of drought-responsive as well as intrinsic pathways of LR formation in cereals.
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000021002 65320 $$2Author$$alateral root initiation
000021002 65320 $$2Author$$awater deficit
000021002 65320 $$2Author$$abarley
000021002 65320 $$2Author$$amaize
000021002 650_2 $$2MeSH$$aBiological Transport
000021002 650_2 $$2MeSH$$aCell Division
000021002 650_2 $$2MeSH$$aDroughts
000021002 650_2 $$2MeSH$$aHordeum: drug effects
000021002 650_2 $$2MeSH$$aHordeum: growth & development
000021002 650_2 $$2MeSH$$aHordeum: metabolism
000021002 650_2 $$2MeSH$$aIndoleacetic Acids: metabolism
000021002 650_2 $$2MeSH$$aIndoleacetic Acids: pharmacology
000021002 650_2 $$2MeSH$$aOsmotic Pressure
000021002 650_2 $$2MeSH$$aPlant Cells: metabolism
000021002 650_2 $$2MeSH$$aPlant Roots: drug effects
000021002 650_2 $$2MeSH$$aPlant Roots: growth & development
000021002 650_2 $$2MeSH$$aPlant Roots: metabolism
000021002 650_2 $$2MeSH$$aSignal Transduction
000021002 650_2 $$2MeSH$$aTime Factors
000021002 650_2 $$2MeSH$$aWater: metabolism
000021002 650_2 $$2MeSH$$aZea mays: drug effects
000021002 650_2 $$2MeSH$$aZea mays: growth & development
000021002 650_2 $$2MeSH$$aZea mays: metabolism
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000021002 650_7 $$07732-18-5$$2NLM Chemicals$$aWater
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000021002 7001_ $$0P:(DE-HGF)0$$aLavigne, T.$$b1
000021002 7001_ $$0P:(DE-HGF)0$$aSéverin, J.-P.$$b2
000021002 7001_ $$0P:(DE-Juel1)129373$$aNagel, K.A.$$b3$$uFZJ
000021002 7001_ $$0P:(DE-HGF)0$$aWalter, A.$$b4$$ufzj
000021002 7001_ $$0P:(DE-HGF)0$$aChaumont, F.$$b5
000021002 7001_ $$0P:(DE-HGF)0$$aBatoko, H.$$b6
000021002 7001_ $$0P:(DE-HGF)0$$aBeeckman, T.$$b7
000021002 7001_ $$0P:(DE-HGF)0$$aDraye, X.$$b8
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000021002 8567_ $$2Pubmed Central$$uhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3321690
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