Sugar Sensing and Signaling in Plants: Conserved and Novel Mechanisms

Sugars not only fuel cellular carbon and energy metabolism but also play pivotal roles as signaling molecules. The experimental amenability of yeast as a unicellular model system has enabled the discovery of multiple sugar sensors and signaling pathways. In plants, different sugar signals are genera...

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Bibliographic Details
Published in:Annual review of plant biology 2006-01, Vol.57 (1), p.675-709
Main Authors: Rolland, F, Baena-Gonzalez, E, Sheen, J
Format: Article
Language:English
Subjects:
Analysis
Arabidopsis
biochemical pathways
Biosensing Techniques
Carbohydrate Metabolism
chemical reactions
Enzymatic activity
enzyme activity
Flowers & plants
gene expression regulation
genes
Glucose
hexokinase
Hormones
literature reviews
metabolism
Molecules
Photosynthesis
Plant Development
plant physiology
Plants - enzymology
Plants - metabolism
Sensors
Signal Transduction
sucrose
Sugar
sugars
transcription (genetics)
translation (genetics)
trehalose
Yeast
Yeasts
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Summary:Sugars not only fuel cellular carbon and energy metabolism but also play pivotal roles as signaling molecules. The experimental amenability of yeast as a unicellular model system has enabled the discovery of multiple sugar sensors and signaling pathways. In plants, different sugar signals are generated by photosynthesis and carbon metabolism in source and sink tissues to modulate growth, development, and stress responses. Genetic analyses have revealed extensive interactions between sugar and plant hormone signaling, and a central role for hexokinase (HXK) as a conserved glucose sensor. Diverse sugar signals activate multiple HXK-dependent and HXK-independent pathways and use different molecular mechanisms to control transcription, translation, protein stability and enzymatic activity. Important and complex roles for Snf1-related kinases (SnRKs), extracellular sugar sensors, and trehalose metabolism in plant sugar signaling are now also emerging.
ISSN:1543-5008
1040-2519
1545-2123
DOI:10.1146/annurev.arplant.57.032905.105441