Document Detail


Early development and gravitropic response of lateral roots in Arabidopsis thaliana.
MedLine Citation:
PMID:  22527393     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Root system architecture plays an important role in determining nutrient and water acquisition and is modulated by endogenous and environmental factors, resulting in considerable developmental plasticity. The orientation of primary root growth in response to gravity (gravitropism) has been studied extensively, but little is known about the behaviour of lateral roots in response to this signal. Here, we analysed the response of lateral roots to gravity and, consistently with previous observations, we showed that gravitropism was acquired slowly after emergence. Using a lateral root induction system, we studied the kinetics for the appearance of statoliths, phloem connections and auxin transporter gene expression patterns. We found that statoliths could not be detected until 1 day after emergence, whereas the gravitropic curvature of the lateral root started earlier. Auxin transporters modulate auxin distribution in primary root gravitropism. We found differences regarding PIN3 and AUX1 expression patterns between the lateral root and the primary root apices. Especially PIN3, which is involved in primary root gravitropism, was not expressed in the lateral root columella. Our work revealed new developmental transitions occurring in lateral roots after emergence, and auxin transporter expression patterns that might explain the specific response of lateral roots to gravity.
Authors:
S Guyomarc'h; S Léran; M Auzon-Cape; F Perrine-Walker; M Lucas; L Laplaze
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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:  1509-16     Citation Subset:  IM    
Affiliation:
Université Montpellier 2, UMR DIADE, Equipe Rhizogenèse, 911 Avenue Agropolis, 34394 Montpellier cedex 5, France.
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MeSH Terms
Descriptor/Qualifier:
Arabidopsis / genetics,  growth & development*,  metabolism
Arabidopsis Proteins / genetics,  metabolism
Cell Differentiation
Gene Expression Regulation, Plant*
Genes, Plant
Gravitropism*
Green Fluorescent Proteins / metabolism
Membrane Transport Proteins / genetics,  metabolism
Meristem / genetics,  growth & development,  metabolism
Phloem / growth & development,  metabolism
Plant Cells / metabolism
Plant Proteins / genetics,  metabolism
Plant Roots / genetics,  growth & development*,  metabolism
Protein Transport
Chemical
Reg. No./Substance:
0/AUX1 protein, Arabidopsis; 0/Arabidopsis Proteins; 0/Membrane Transport Proteins; 0/PIN3 protein, Arabidopsis; 0/Plant Proteins; 0/sucrose transport protein, plant; 147336-22-9/Green Fluorescent Proteins
Comments/Corrections

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