Document Detail

Cortical microtubule arrays lose uniform alignment between cells and are oryzalin resistant in the Arabidopsis mutant, radially swollen 6.
MedLine Citation:
PMID:  16760219     Owner:  NLM     Status:  MEDLINE    
The coordinated expansion of cells is essential to the formation of correctly shaped plant tissues and organs. Members of the radially swollen (rsw) class of temperature-sensitive arabidopsis mutants were isolated in a screen for reduced anisotropic expansion, by selecting plants with radially swollen root tips. Here we describe rsw6, in which cortical microtubules in the root epidermis are well organized in parallel arrays within cells, but neighboring cells frequently contain arrays differing in their mean orientation by up to 90 degrees. Microtubules in rsw6 are more resistant to oryzalin-induced depolymerization than wild-type microtubules, and their reorientation is accompanied by swelling of the epidermal cells. The reorientation phenotype is blocked by taxol and by the depolymerization of actin filaments. We propose that rsw6 microtubule organization is functional on a local level, but defective on a global scale. The rsw6 mutant provides a unique tool with which to study the coordination of microtubule organization at a multicellular level.
Alex Bannigan; Allison M D Wiedemeier; Richard E Williamson; Robyn L Overall; Tobias I Baskin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2006-06-07
Journal Detail:
Title:  Plant & cell physiology     Volume:  47     ISSN:  0032-0781     ISO Abbreviation:  Plant Cell Physiol.     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-07-19     Completed Date:  2006-11-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9430925     Medline TA:  Plant Cell Physiol     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  949-58     Citation Subset:  IM    
Biology Department, University of Massachusetts, Amherst, MA, USA.
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MeSH Terms
Actins / physiology
Antineoplastic Agents, Phytogenic / pharmacology
Arabidopsis / cytology,  genetics*
Arabidopsis Proteins / genetics*
Cell Line
Dinitrobenzenes / pharmacology*
Drug Resistance
Genes, Plant / genetics
Microtubules / drug effects*,  ultrastructure
Mutation / genetics*
Paclitaxel / pharmacology
Plant Roots / cytology,  drug effects,  growth & development
Plants, Genetically Modified
Sulfanilamides / pharmacology*
Tubulin Modulators / pharmacology*
Reg. No./Substance:
0/Actins; 0/Antineoplastic Agents, Phytogenic; 0/Arabidopsis Proteins; 0/Dinitrobenzenes; 0/Sulfanilamides; 0/Tubulin Modulators; 19044-88-3/oryzalin; 33069-62-4/Paclitaxel

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