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 Abscisic acid (ABA)?
Abscisic acid (ABA) is a plant hormone. ABA functions in many plant developmental processes, including seed and bud dormancy, the ...
What is Bone?
Bone-forming cells called osteoblasts deposit a matrix of collagen. Calcium, magnesium, and phosphate ions combine into a hard mineral within ...
What is Gene pool?
A gene pool is the collection of different genes within an interbreeding population. The term gene pool is used to ...
What is tRNA?
Transfer ribonucleic acid (tRNA) is a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a ...
What are Endophytes?
An endophyte is an endosymbiont, often a bacterium or fungus, that lives within a plant for at least part of ...
What are Catalysts?
Generally, the rate of a chemical reaction is increased by adding a substance known as a catalyst, which is not ...
