Sugar and ABA response pathways and the control of gene expression

Sugars are essential to plant growth and metabolism, both as energy source and as structural components. Sugar production and use are in part controlled at the level of gene expression by the sugars themselves. Responses to sugar are closely integrated with response pathways that indicate environmen...

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Bibliographic Details
Published in:Plant, cell and environment cell and environment, 2006-03, Vol.29 (3), p.426-434
Main Authors: Rook, Fred, Hadingham, Sophie A, Li, Yunhai, Bevan, Michael W
Format: Article
Language:English
Subjects:
ABI4
abscisic acid
Abscisic Acid - metabolism
ApL3
Arabidopsis Proteins - metabolism
Biological and medical sciences
biosynthesis
Carbohydrate Metabolism
Cell physiology
energy
environmental factors
Fundamental and applied biological sciences. Psychology
gene expression
Gene Expression Regulation, Plant
genes
Light
Molecular and cellular biology
Mutation
Photosynthesis - genetics
plant growth
Plants - metabolism
promoter regions
Promoter Regions, Genetic
seedlings
Signal transduction
Signal Transduction - physiology
starch
sugar responses
sugars
transcription (genetics)
Transcription Factors - metabolism
Transcription, Genetic
transposons
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Summary:Sugars are essential to plant growth and metabolism, both as energy source and as structural components. Sugar production and use are in part controlled at the level of gene expression by the sugars themselves. Responses to sugar are closely integrated with response pathways that indicate environmental conditions such as light and water availability. High sugar levels inhibit seedling development, repress photosynthetic gene expression and induce genes of storage metabolism such as those of starch biosynthesis. Genetic approaches have demonstrated the importance of abscisic acid (ABA) and the transcriptional regulator ABA-insensitive4 (ABI4) in sugar response pathways. Recent analysis of both photosynthetic and starch biosynthetic gene promoters suggest a direct role for ABI4 in their control. The increased understanding of the regulatory promoter elements controlling gene expression, in response to sugar and ABA, allows transcriptional networks to be understood at a molecular level.
ISSN:0140-7791
1365-3040
DOI:10.1111/j.1365-3040.2005.01477.x