Sugar Signaling Mechanisms in Plant Development
Summary
Plants deploy sugars not only as essential carbon and energy sources but also as critical signalling molecules that orchestrate developmental programmes. Specific sensor–transducer proteins, including hexokinases and fructokinases, detect sugar fluctuations and initiate downstream kinase cascades such as SnRK1 (KIN10) and TOR, which adjust growth, resource allocation and stress responses. Sucrose transporters relay long-distance carbohydrate cues between source and sink tissues, coordinating organogenesis, vascular differentiation and stomatal patterning. Sugar signals intricately intersect with phytohormones—auxin, abscisic acid and ethylene—to fine-tune germination, root architecture, phase transitions and reproductive development. Moreover, epigenetic modifications, including DNA methylation and histone marks, reshape the transcriptional landscape in response to carbon status. Unravelling these mechanisms offers avenues for enhancing crop yield, resource use efficiency and resilience to environmental challenges.
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Sugar Signaling Mechanisms in Plant Development publication trend
The graph below shows the total number of articles in sugar signaling mechanisms in plant development across all publications each year (not limited to Nature Index journals).
Technical terms
Hexokinase1 (HXK1): dual-function enzyme that phosphorylates glucose and initiates glucose-dependent signalling.
SnRK1 (KIN10): central energy-sensor kinase that integrates sugar and stress signals to regulate growth.
Target of Rapamycin (TOR): kinase that promotes growth in response to nutrient and sugar availability.
SUC2: phloem sucrose transporter mediating long-distance carbohydrate export.
DNA methylation: epigenetic addition of methyl groups to cytosine bases affecting gene expression.
Fructokinase (FRK): enzyme that phosphorylates fructose and contributes to sugar sensing and metabolism.
References
- Sugar status in preexisting leaves determines systemic stomatal development within newly developing leaves. Proceedings of the National Academy of Sciences of the United States of America (2023).
- Grapevine cell response to carbon deficiency requires transcriptome and methylome reprogramming. Horticulture Research (2024).
- The Sugar-Signaling Hub: Overview of Regulators and Interaction with the Hormonal and Metabolic Network. International Journal of Molecular Sciences (2018).
- Hexose Kinases and Their Role in Sugar-Sensing and Plant Development. Frontiers in Plant Science (2013).
- Plant Fructokinases: Evolutionary, Developmental, and Metabolic Aspects in Sink Tissues. Frontiers in Plant Science (2018).
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