GCR1, GPA1, PRN1, NF-Y Signal Chain Mediates Both Blue Light and Abscisic Acid Responses in Arabidopsis

Different classes of biotic (e.g. plant hormones) and abiotic (e.g. different wavelengths of light) signals act through specific signal transduction mechanisms to coordinate higher plant development. While a great deal of progress has been made, full signal transduction chains have not yet been desc...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 2007-04, Vol.143 (4), p.1590-1600
Main Authors: Warpeha, Katherine M, Upadhyay, Snehali, Yeh, Jennifer, Adamiak, Julia, Hawkins, Samuel I, Lapik, Yevgeniya R, Anderson, Mary Beth, Kaufman, Lon S
Format: Article
Language:English
Subjects:
Abscisic Acid - metabolism
Arabidopsis - embryology
Arabidopsis - metabolism
Arabidopsis Proteins - metabolism
Arabidopsis thaliana
Biological and medical sciences
Cell Biology and Signal Transduction
Cell physiology
Cotyledons
Fundamental and applied biological sciences. Psychology
Gene expression regulation
Germination
Light
Molecular and cellular biology
Plants
Propagation delay
RNA
Saccharomyces cerevisiae
Seed germination
Seedlings
Seeds - growth & development
Signal Transduction
Two-Hybrid System Techniques
Yeasts
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Summary:Different classes of biotic (e.g. plant hormones) and abiotic (e.g. different wavelengths of light) signals act through specific signal transduction mechanisms to coordinate higher plant development. While a great deal of progress has been made, full signal transduction chains have not yet been described for most blue light- or abscisic acid-mediated events. Based on data derived from T-DNA insertion mutants and yeast (Saccharomyces cerevisiae) two-hybrid and coprecipitation assays, we report a signal transduction chain shared by blue light and abscisic acid leading to light-harvesting chlorophyll a/b-binding protein expression in etiolated Arabidopsis (Arabidopsis thaliana) seedlings. The chain consists of GCR1 (the sole Arabidopsis protein coding for a potential G-protein-coupled receptor), GPA1 (the sole Arabidopsis Gα-subunit), Pirin1 (PRN1; one of four members of an iron-containing subgroup of the cupin superfamily), and a nuclear factor Y heterotrimer comprised of A5, B9, and possibly C9. We also demonstrate that this mechanism is present in imbibed seeds wherein it affects germination rate.
ISSN:0032-0889
1532-2548
1532-2548
DOI:10.1104/pp.106.089904