Abscisic acid (ABA) Notes: Definitions & Explanations PDF | Download eBooks
Study Abscisic acid (ABA) lecture notes PDF with biology definitions and 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) Notes:
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 with Biology Notes
What is Thermoregulation?
Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when the surrounding temperature ...
What is Karyotype?
A karyotype is the number and appearance of chromosomes in the nucleus of a eukaryotic cell. When the chromosomes are ...
What is Transmembrane route?
The transmembrane route is a route where water and solutes use a combination of the apoplastic and symplastic modes of ...
What is Chloroplast?
Just like the mitochondria in the animal cells the chloroplast function as the power house in the plant cells. This ...
What is Cell differentiation?
Cellular differentiation is the process where a cell changes from one cell type to another. Usually, the cell changes to ...
What is Stem cell?
A stem cell is a cell with the unique ability to develop into specialized cell types in the body. In ...
