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Sugar and hormone connections.

Patricia León1, Jen Sheen

  • 1Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autonoma de México, Cuernavaca, Morelos 62271, Mexico.

Trends in Plant Science
|March 29, 2003
PubMed
Summary

Plant sugars and hormones like abscisic acid (ABA) and ethylene interact to control growth. Glucose directly influences ABA and ethylene pathways, affecting plant development differently at various concentrations.

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Area of Science:

  • Plant biology
  • Molecular signalling
  • Plant hormones

Background:

  • Sugars and hormones are crucial regulators of plant growth and development.
  • Plant signalling networks integrate sugar responses with hormonal pathways.

Purpose of the Study:

  • To investigate the complex interplay between sugar signalling and plant hormones (abscisic acid and ethylene).
  • To elucidate the molecular mechanisms underlying glucose control in plant development.

Main Methods:

  • Analysis of sugar-signalling mutants in Arabidopsis.
  • Molecular analyses of gene expression related to glucose, abscisic acid, and ethylene signalling.

Main Results:

  • A complex signalling network links sugar responses to abscisic acid and ethylene antagonistically.
  • Glucose directly controls abscisic acid biosynthesis and signalling genes.
  • Glucose and abscisic acid exhibit concentration-dependent effects on plant growth, promoting it at low levels and inhibiting it synergistically at high levels.
  • Sugar and osmotic stress have distinct effects on plant morphogenesis and gene expression.

Conclusions:

  • Plant growth plasticity is exemplified by the intricate crosstalk between sugar and hormone signalling pathways.
  • Understanding these interactions is key to comprehending plant development and stress responses.

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