Document Detail

In silico analyses of pericycle cell populations reinforce their relation with associated vasculature in Arabidopsis.
MedLine Citation:
PMID:  22527390     Owner:  NLM     Status:  MEDLINE    
In Arabidopsis, lateral root initiation occurs in a subset of pericycle cells at the xylem pole that will divide asymmetrically to give rise to a new lateral root organ. While lateral roots never develop at the phloem pole, it is unclear how the interaction with xylem and phloem poles determines the distinct pericycle identities with different competences. Nevertheless, pericycle cells at these poles are marked by differences in size, by ultrastructural features and by specific proteins and gene expression. Here, we provide transcriptional evidence that pericycle cells are intimately associated with their vascular tissue instead of being a separate concentric layer. This has implications for the identification of cell- and tissue-specific promoters that are necessary to drive and/or alter gene expression locally, avoiding pleiotropic effects. We were able to identify a small set of genes that display specific expression in the phloem or xylem pole pericycle cells, and we were able to identify motifs that are likely to drive expression in either one of those tissues.
Boris Parizot; Ianto Roberts; Jeroen Raes; Tom Beeckman; Ive De Smet
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Philosophical transactions of the Royal Society of London. Series B, Biological sciences     Volume:  367     ISSN:  1471-2970     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-04-24     Completed Date:  2012-08-06     Revised Date:  2013-06-25    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  1479-88     Citation Subset:  IM    
Department of Plant Systems Biology, VIB, Technologiepark 927, 9052 Ghent, Belgium.
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MeSH Terms
Arabidopsis / genetics,  metabolism,  physiology*
Cluster Analysis
DNA-Binding Proteins / genetics,  metabolism
Gene Expression Regulation, Plant*
Genes, Plant
Nucleotide Motifs
Oligonucleotide Array Sequence Analysis
Phloem / genetics,  metabolism,  physiology
Plant Cells / metabolism,  physiology*
Plant Roots / cytology*,  metabolism,  physiology
Promoter Regions, Genetic
Regulatory Elements, Transcriptional
Transcription Factors / genetics,  metabolism
Xylem / genetics,  metabolism,  physiology
Grant Support
BB_BB/H022457/1//Biotechnology and Biological Sciences Research Council
Reg. No./Substance:
0/DNA-Binding Proteins; 0/Transcription Factors

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