Peptides: new signalling molecules in plants

Trends Plant Sci. 2002 Feb;7(2):78-83. doi: 10.1016/s1360-1385(01)02194-x.


For many years, our insight into intercellular signalling in plants was based upon our knowledge of the so-called five classical plant hormones--auxin, cytokinin, ethylene, gibberellin and abscisic acid. However, biochemical and genetic studies have identified peptides that play crucial roles in plant growth and development, including defence mechanisms in response to wounding by pests, the control of cell division and expansion, and pollen self-incompatibility. Genome sequencing has revealed many predicted peptide-encoding genes and possible receptors, and a major challenge of the post-genomics era is to determine the function of these molecules.

Publication types

  • Review

MeSH terms

  • Arabidopsis Proteins*
  • Growth Substances / genetics
  • Growth Substances / physiology
  • Meristem / genetics
  • Meristem / physiology
  • Peptide Hormones
  • Peptides / genetics*
  • Peptides / physiology
  • Plant Growth Regulators*
  • Plant Proteins / genetics*
  • Plant Proteins / physiology
  • Plant Roots / genetics
  • Plant Roots / physiology
  • Protein-Serine-Threonine Kinases
  • Receptor Protein-Tyrosine Kinases / genetics
  • Receptor Protein-Tyrosine Kinases / physiology
  • Signal Transduction*


  • AT2G27250 protein, Arabidopsis
  • Arabidopsis Proteins
  • Growth Substances
  • PSK-alpha protein, plant
  • PSK-beta protein, plant
  • Peptide Hormones
  • Peptides
  • Plant Growth Regulators
  • Plant Proteins
  • SCR protein, Brassica oleracea
  • systemin
  • Receptor Protein-Tyrosine Kinases
  • CLV1 protein, Arabidopsis
  • Protein-Serine-Threonine Kinases