Abscisic Acid (ABA)
Published Online: 15 MAR 2009
Copyright © 2001 John Wiley & Sons, Ltd. All rights reserved.
How to Cite
Cutler, A. J. 2009. Abscisic Acid (ABA). eLS.
- Published Online: 15 MAR 2009
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.
- abiotic stress;
- 9-cis epoxycarotenoid dioxygenase;