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Sugar and phytohormone response pathways: navigating a signalling network.

Susan I Gibson1

  • 1Department of Plant Biology, University of Minnesota, 250 Bio Sci Center, 1445 Gortner Avenue, St Paul, MN 55108-1095, USA. gibso043@tc.umn.edu

Journal of Experimental Botany
|December 16, 2003
PubMed
Summary
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Plant nutrient availability, especially sugars, influences development and metabolism. Sugars and phytohormones interact to regulate key processes like seed germination and tuberization.

Area of Science:

  • Plant Physiology
  • Molecular Biology
  • Developmental Biology

Background:

  • Plant development, physiology, and metabolism are significantly influenced by nutrient availability, particularly soluble sugars like glucose and sucrose.
  • Phytohormones are also critical signaling molecules that regulate numerous plant processes.
  • Evidence suggests complex interactions between sugar signaling and phytohormone pathways in plants.

Purpose of the Study:

  • To review the intricate crosstalk between sugar and phytohormone signaling pathways in plants.
  • To highlight key plant processes regulated by these interactions.
  • To explore the molecular mechanisms underlying sugar-phytohormone crosstalk.

Main Methods:

  • Literature review of studies on sugar and phytohormone signaling in various plant systems (e.g., Arabidopsis, cereals, potato, bean).

Related Experiment Videos

  • Analysis of examples demonstrating the interplay between sugar availability and phytohormone action.
  • Examination of proposed mechanisms for signal transduction and pathway interaction.

    • Main Results:

    • Five major examples of sugar-phytohormone crosstalk are detailed: embryogenesis, seed germination, seedling development, tuberization, and alpha-amylase regulation.
    • Mechanisms include reciprocal regulation of signaling molecule metabolism, transport, and gene expression.
    • Sugars can influence phytohormone synthesis/transport, while phytohormones affect sugar metabolism and gene expression.

    Conclusions:

    • Sugar and phytohormone signaling pathways are deeply interconnected, regulating fundamental plant processes.
    • This crosstalk involves complex molecular mechanisms at the level of metabolism, transport, and gene regulation.
    • Understanding these interactions is crucial for comprehending plant growth, development, and adaptation.