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Abscisic Acid (ABA)

  1. Adrian J Cutler

Published Online: 15 MAR 2009

DOI: 10.1002/9780470015902.a0020088.pub2

eLS

eLS

How to Cite

Cutler, A. J. 2009. Abscisic Acid (ABA). eLS. .

Author Information

  1. Plant Biotechnology Institute, Saskatoon, Saskatchewan, Canada

Publication History

  1. Published Online: 15 MAR 2009

Abstract

Abscisic acid (ABA) is a phytohormone found in all higher plants that mediates responses to abiotic stress conditions and controls stomatal aperture. It is also involved in seed development and is associated with seed dormancy. ABA is biosynthesized in higher plants from carotenoid precursors. ABA acts via a complex signalling process leading to both short-term changes in ion channel activity and long-term effects on gene expression.

Keywords:

  • abiotic stress;
  • germination;
  • dormancy;
  • 9-cis epoxycarotenoid dioxygenase;
  • phytohormone