Document Detail

Actin organization during eucalyptus root hair development and its response to fungal hypaphorine.
MedLine Citation:
PMID:  16547865     Owner:  NLM     Status:  MEDLINE    
The fungus Pisolithus microcarpus establishes an ectomycorrhiza with Eucalyptus globulus. This symbiosis involves a fungal synthesis and secretion of hypaphorine, an indolic compound. Previous studies have shown that hypaphorine induces an alteration in the actin cytoskeleton of elongating root hairs and inhibits hair elongation. Using an alternative approved method, we analyzed the effects of hypaphorine on the E. globulus root hair cyto-architecture and actin configuration in more detail and provide new results. One mM hypaphorine stops root hair elongation within 20 min, and changes the hair cyto-architecture. Semi-quantitative analysis of the actin cytoskeleton before and after treatment with hypaphorine shows that hypaphorine induces a shift from fine F-actin to F-actin bundles in the sub-apex of the hair, which occurs first in the mid-plane of the cell. This creates a sub-apical cell centre free of filamentous actin, an actin configuration that differs from that during developmental growth arrest. The mechanism of action of hypaphorine is discussed.
A Dauphin; N C A De Ruijter; A M C Emons; V Legué
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant biology (Stuttgart, Germany)     Volume:  8     ISSN:  1435-8603     ISO Abbreviation:  Plant Biol (Stuttg)     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-20     Completed Date:  2006-05-24     Revised Date:  2008-01-07    
Medline Journal Info:
Nlm Unique ID:  101148926     Medline TA:  Plant Biol (Stuttg)     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  204-11     Citation Subset:  IM    
Unité Mixte de Recherche UMR INRA-UHP 1136 Interactions Arbres/Micro-Organismes, Université Nancy I, Faculté des Sciences, BP 239, 54506 Vandoeuvre Cedex, France.
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MeSH Terms
Actins / metabolism*
Basidiomycota / metabolism*
Cytoskeleton / drug effects,  metabolism
Eucalyptus / cytology,  drug effects,  growth & development*
Indoles / pharmacology*
Plant Roots / cytology*,  drug effects,  growth & development*
Reg. No./Substance:
0/Actins; 0/Indoles; 487-58-1/lenticin

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