| Cell cycle progression in the pericycle is not sufficient for SOLITARY ROOT/IAA14-mediated lateral root initiation in Arabidopsis thaliana. | |
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MedLine Citation:
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PMID: 16243906 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To study the mechanisms behind auxin-induced cell division, lateral root initiation was used as a model system. By means of microarray analysis, genome-wide transcriptional changes were monitored during the early steps of lateral root initiation. Inclusion of the dominant auxin signaling mutant solitary root1 (slr1) identified genes involved in lateral root initiation that act downstream of the auxin/indole-3-acetic acid (AUX/IAA) signaling pathway. Interestingly, key components of the cell cycle machinery were strongly defective in slr1, suggesting a direct link between AUX/IAA signaling and core cell cycle regulation. However, induction of the cell cycle in the mutant background by overexpression of the D-type cyclin (CYCD3;1) was able to trigger complete rounds of cell division in the pericycle that did not result in lateral root formation. Therefore, lateral root initiation can only take place when cell cycle activation is accompanied by cell fate respecification of pericycle cells. The microarray data also yielded evidence for the existence of both negative and positive feedback mechanisms that regulate auxin homeostasis and signal transduction in the pericycle, thereby fine-tuning the process of lateral root initiation. |
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Authors:
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Steffen Vanneste; Bert De Rybel; Gerrit T S Beemster; Karin Ljung; Ive De Smet; Gert Van Isterdael; Mirande Naudts; Ryusuke Iida; Wilhelm Gruissem; Masao Tasaka; Dirk Inzé; Hidehiro Fukaki; Tom Beeckman |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-10-21 |
Journal Detail:
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Title: The Plant cell Volume: 17 ISSN: 1040-4651 ISO Abbreviation: Plant Cell Publication Date: 2005 Nov |
Date Detail:
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Created Date: 2005-11-03 Completed Date: 2006-05-26 Revised Date: 2010-09-20 |
Medline Journal Info:
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Nlm Unique ID: 9208688 Medline TA: Plant Cell Country: United States |
Other Details:
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Languages: eng Pagination: 3035-50 Citation Subset: IM |
Affiliation:
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Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, B-9052 Ghent, Belgium. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arabidopsis
/
genetics,
growth & development*,
metabolism Arabidopsis Proteins / genetics, metabolism Cell Cycle / genetics* Cell Cycle Proteins / genetics, metabolism* Cyclins / genetics, metabolism Feedback, Physiological / physiology Gene Expression Regulation, Plant / physiology Genes, Plant / physiology Indoleacetic Acids / metabolism* Mutation / physiology* Plant Roots / genetics, growth & development*, metabolism Signal Transduction / physiology Up-Regulation / physiology |
| Chemical | |
Reg. No./Substance:
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0/Arabidopsis Proteins; 0/Cell Cycle Proteins; 0/CycD3 protein, Arabidopsis; 0/Cyclins; 0/Indoleacetic Acids; 87-51-4/indoleacetic acid |
| Comments/Corrections | |
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