Document Detail

Gibberellin and abscisic acid signalling in aleurone.
MedLine Citation:
PMID:  10707075     Owner:  NLM     Status:  MEDLINE    
The plant hormones gibberellin and abscisic acid regulate gene expression, secretion and cell death in aleurone. The emerging picture is of gibberellin perception at the plasma membrane whereas abscisic acid acts at both the plasma membrane and in the cytoplasm - although gibberellin and abscisic acid receptors have yet to be identified. A range of downstream-signalling components and events has been implicated in gibberellin and abscisic acid signalling in aleurone. These include the Galpha subunit of a heterotrimeric G protein, a transient elevation in cGMP, Ca2+-dependent and Ca2+-independent events in the cytoplasm, reversible protein phosphory-lation, and several promoter cis-elements and transcription factors, including GAMYB. In parallel, molecular genetic studies on mutants of Arabidopsis that show defects in responses to these hormones have identified components of gibberellin and abscisic acid signalling. These two approaches are yielding results that raise the possibility that specific gibberellin and abscisic acid signalling components perform similar functions in aleurone and other tissues.
A Lovegrove; R Hooley
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Trends in plant science     Volume:  5     ISSN:  1360-1385     ISO Abbreviation:  Trends Plant Sci.     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2001-01-26     Completed Date:  2001-10-04     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  9890299     Medline TA:  Trends Plant Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  102-10     Citation Subset:  IM    
IACR-Long Ashton Research Station, Dept of Agricultural Sciences, University of Bristol, Long Ashton, Bristol, UK BS41 9AF.
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MeSH Terms
Abscisic Acid / metabolism*
Arabidopsis / metabolism
Calcium-Calmodulin-Dependent Protein Kinases / metabolism
Cyclic GMP / metabolism
Gibberellins / metabolism*
Heterotrimeric GTP-Binding Proteins / metabolism
Models, Biological
Poaceae / metabolism
Second Messenger Systems
Seeds / metabolism*
Signal Transduction*
Reg. No./Substance:
0/Gibberellins; 21293-29-8/Abscisic Acid; 7665-99-8/Cyclic GMP; EC Protein Kinases; EC GTP-Binding Proteins

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

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