As an Amazon Associate I earn from qualifying purchases.

What is Abscisic acid (ABA) in Biology? PDF | Download eBooks

Learn Abscisic acid (ABA) definition in biology with explanation to study “What is Abscisic acid (ABA)”. Study abscisic acid (aba) explanation with biology terms to review biology course for online degree programs.

Abscisic acid (ABA) Definition

  • A hormone called abscisic acid (ABA), produced in roots and leaves in response to water deficiency, signals guard cells to close stomata.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson



Abscisic acid (ABA) Explanation

Abscisic acid (ABA) is a plant hormone. ABA functions in many plant developmental processes, including seed and bud dormancy, the control of organ size and stomatal closure. It is especially important for plants in the response to environmental stresses, including drought, soil salinity, cold tolerance, freezing tolerance, heat stress and heavy metal ion tolerance. Abscisic acid owes its names to its role in the abscission of plant leaves. In preparation for winter, ABA is produced in terminal buds. [11] This slows plant growth and directs leaf primordia to develop scales to protect the dormant buds during the cold season. ABA also inhibits the division of cells in the vascular cambium, adjusting to cold conditions in the winter by suspending primary and secondary growth.

Keep Learning Biology Explanations

What is Translation?

Translation is the process in which ribosomes in the cytoplasm or ER synthesize proteins after the process of transcription of ...

What is Herbivores?

A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage or marine algae, for ...

What is Heart attack?

Myocardial infarction is commonly known as a heart attack and occurs when blood flow decreases or stops to a part ...

What is Acrosome?

The acrosome is an organelle that develops over the frontal part of the sperm of many animals including humans. It ...

What is Genetic drift?

Genetic drift is the change in the frequency of an existing gene variant in a population due to random sampling ...

What is Taxonomy?

Taxonomy is the science of defining and naming groups of biological organisms on the basis of shared characteristics. Organisms are ...