Regulation of ABA Homeostasis in Plants during Stress

Abstract

Abscisic acid (ABA) is the major hub for signal transduction pathways that regulates a number of pathways during abiotic stress and therefore every step taken in this area always unveils new things. ABA homeostasis is an equilibrium maintained by plants during normal and stress conditions for level of ABA. ABA homeostasis under stress is important as change in homeostasis creates differences in gene expressions. Four important phenomena i.e biosynthesis, transportation, conjugation and degradation affect the level of ABA present in plants which may vary from crop to crop. To generate proper tolerance fine tuning of one of these four pathways can be adopted. Therefore studying the genes involved in ABA homeostasis and their responses during abiotic stress is important which is covered in the present review.