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 Hypothalamus?
The hypothalamus is a portion of the brain has a variety of functions. One of the most important functions of ...
What is Growth hormone?
Growth hormone is also known as human growth hormone. It is a peptide hormone that incites growth, cell reproduction and ...
What are Mammary glands?
A mammary gland is an exocrine gland in mammals that produces milk. This milk is to feed young offspring. The ...
What is Phenotype?
The phenotype of an organism is the composite of the organism's observable characteristics or traits, including its morphology or physical ...
What is Cytogenetic map?
A cytogenetic map is the visual appearance of a chromosome when stained and examined under a microscope. Particularly important are ...
What is Radiometric dating?
Radiometric dating or radioisotope dating is a technique used to date materials such as rocks or carbon, in which trace ...
