Gene

Cell biology

Ecology

Biology

Abiotic component

Dormancy

Abiotic stress

Biochemistry

Botany

Senescence

Abscisic acid

Germination

Journal of Integrative Plant Biology

Abscisic acid (ABA) is an important phytohormone regulating plant growth, development, and stress responses. It has an essential role in multiple physiological processes of plants, such as stomatal closure, cuticular wax accumulation, leaf senescence, bud dormancy, seed germination, osmotic regulation, and growth inhibition among many others. Abscisic acid controls downstream responses to abiotic and biotic environmental changes through both transcriptional and posttranscriptional mechanisms. During the past 20 years, ABA biosynthesis and many of its signaling pathways have been well characterized. Here we review the dynamics of ABA metabolic pools and signaling that affects many of its physiological functions.

Abscisic acid dynamics, signaling, and functions in plants