The ABA receptors -- we report you decide

Curr Opin Plant Biol. 2008 Oct;11(5):474-8. doi: 10.1016/j.pbi.2008.06.014. Epub 2008 Sep 4.


The plant hormone abscisic acid (ABA) has been implicated in a variety of physiological responses ranging from seed dormancy to stomatal conductance. Recently, three groups have reported the molecular identification of three disparate ABA receptors. Unlike the identification of other hormone receptors, in these three cases high affinity binding to ABA rather than the isolation of ABA insensitive mutants led to these receptor genes. Interestingly, two of the receptors encode genes involved in floral timing and chlorophyll biosynthesis, which are not considered traditional ABA responses. And the third receptor has been clouded in issues of its molecular identity. To clearly determine the roles of these genes in ABA perception it will require placing of these ABA-binding proteins into the rich ABA physiological context that has built up over the years.

Publication types

  • Review

MeSH terms

  • Abscisic Acid / metabolism
  • Abscisic Acid / physiology*
  • Binding Sites
  • Plant Growth Regulators / metabolism
  • Plant Growth Regulators / physiology*
  • Plant Proteins / genetics
  • Plant Proteins / physiology*
  • Plants / metabolism
  • Signal Transduction / physiology


  • Plant Growth Regulators
  • Plant Proteins
  • Abscisic Acid