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Related Experiment Video

Updated: May 2, 2026

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues
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Trehalose metabolism in plants.

John Edward Lunn1, Ines Delorge, Carlos María Figueroa

  • 1Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany.

The Plant Journal : for Cell and Molecular Biology
|March 21, 2014
PubMed
Summary

Trehalose 6-phosphate (Tre6P) acts as a signal for sucrose availability in plants, regulating sugar balance and impacting growth. Tre6P metabolism is crucial for plant development, with mutants showing diverse defects.

Keywords:
abiotic stressplant-microbe interactionsstarchsucrosetrehalosetrehalose 6-phosphate

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Area of Science:

  • Plant Physiology
  • Biochemistry
  • Molecular Biology

Background:

  • Trehalose is a stress protectant in primitive plants, with its role largely replaced by sucrose in vascular plants.
  • Trehalose metabolism has evolved new signaling functions in plants, including interactions with microbes and responses to environmental stress.
  • Trehalose 6-phosphate (Tre6P) is a key intermediate in trehalose synthesis, its levels correlating with sucrose, the primary photosynthetic product.

Purpose of the Study:

  • To investigate the role of trehalose 6-phosphate (Tre6P) as a signaling metabolite in plants.
  • To elucidate the proposed bi-directional network between Tre6P and sucrose metabolism.
  • To explore the impact of Tre6P metabolism on plant growth, development, and stress responses.

Main Methods:

  • Meta-analysis of existing data on Tre6P and sucrose levels.
  • Analysis of mutant phenotypes in Tre6P metabolism.
  • Discussion of proposed regulatory mechanisms involving SNF1-related protein kinase (SnRK1).

Main Results:

  • Tre6P levels change in parallel with sucrose, suggesting a role in signaling sucrose availability.
  • Tre6P influences the balance of sucrose and starch accumulation and degradation in leaves.
  • Mutants in Tre6P metabolism exhibit pleiotropic defects in various aspects of plant growth and development.

Conclusions:

  • Tre6P functions as a signal of sucrose availability, maintaining sucrose homeostasis.
  • Tre6P plays a critical role in regulating plant growth and development, potentially through inhibition of SnRK1.
  • Current models do not fully explain the complex phenotypes of Tre6P metabolism mutants, necessitating further research.