Document Detail

Position dependent control of cell fate in the Fucus embryo: role of intercellular communication.
MedLine Citation:
PMID:  9570765     Owner:  NLM     Status:  MEDLINE    
The early embryo of the brown alga Fucus comprises two cell types, i. e. rhizoid and thallus which are morphogically and cytologically distinguishable. Previous work has pointed to the cell wall as a source of position-dependent information required for polarisation and fate determination in the zygote and 2-celled embryo. In this study we have analysed the mechanism(s) of cell fate control and pattern formation at later embryonic stages using a combination of laser microsurgery and microinjection. The results indicate that the cell wall is required for maintenance of pre-existing polarity in isolated intact cells. However, all cell types ultimately have the capacity to re-differentiate or regenerate rhizoid cells in response to ablation of neighbouring cells. This regeneration is regulated in a position-dependent manner and is strongly influenced by intercellular communication, probably involving transport or diffusion of inhibitory signals which appear to be essential for regulation of cell fate decisions. This type of cell-to-cell communication does not involve symplastic transport or direct cell-cell contact inhibition. Apoplastic diffusible gradients appear to be involved in pattern formation in the multicellular embryo.
F Y Bouget; F Berger; C Brownlee
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Development (Cambridge, England)     Volume:  125     ISSN:  0950-1991     ISO Abbreviation:  Development     Publication Date:  1998 Jun 
Date Detail:
Created Date:  1998-07-14     Completed Date:  1998-07-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8701744     Medline TA:  Development     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1999-2008     Citation Subset:  IM    
Marine Biological Association, The Laboratory, Citadel Hill, Plymouth PL1 2PB, UK.
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MeSH Terms
Algae, Brown / growth & development*
Body Patterning
Cell Communication*
Models, Biological
Plant Growth Regulators
Reg. No./Substance:
0/Plant Growth Regulators

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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