abscisic acid


Also found in: Dictionary, Acronyms, Encyclopedia, Wikipedia.
Related to abscisic acid: auxin, Gibberellins

abscisic acid

(ăb-sĭz′ĭk)
n.
A plant hormone, C15H20O4, that regulates the abscission of leaves, flowers, and fruits, the dormancy of buds and seeds, and other developmental processes and stress responses.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

Abscisic Acid

A lipid hormone of plant origin which is involved in cell signalling. It inhibits plant cell growth and is associated with fruit drop, leaf death and seed dormancy, and helps plants respond to water loss and seasonal changes. Its effects can be reversed with gibberellins. It is synthesised in plastids from carotenoids.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
Abscisic acidclick for a larger image
Fig. 3. Abscisic acid . Molecular stucture.

abscisic acid

a plant growth substance. It is called abscisin when found in ageing leaves and it is partly responsible for leaf ABSCISSION. It is also called DORMIN when in buds and seeds, and causes induction of dormancy. See Fig. 3 .
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Mentioned in ?
References in periodicals archive ?
Estimated values of final germination proportion on exogenous Abscisic acid gradient (A), final germination proportion of the populations submitted to 5 [micro]M of ABA (B) and time to 50% germination (t50) of the ABA gradient of B.
[32.] Singha S and LE Powell Response of apple buds cultured in vitro to abscisic acid. J.
Seung et al., "Regulation of leaf starch degradation by abscisic acid is important for osmotic stress tolerance in plants," The Plant Cell, vol.
Determination of abscisic acid by indirect enzyme linked immunosorbent assay (ELISA).
To cope with salinity stress during different developmental stages of a plant, phytohormones like Abscisic acid (ABA), Indole Acetic Acid (IAA), Gibberellic Acid, Jasmonic Acid, Salicylic Acid, Brassinosteroids and Ethylene are induced or their levels modulated (Ryu and Cho 2015).
Synthesis and movement of abscisic acid in waterstressed cotton leaves.
Induction of dormancy during seed development by endogenous abscisic acid: studies on abscisic acid deficient genotypes of Arabidopsis thaliana (L.) Heynh.
Besides, treatment with cytokinin or abscisic acid (ABA) improves rachis quality during storage, further suggesting the involvement of senescence during rachis browning because cytokinin and ABA are known to have antisenescent effect in plant [40, 41].
Commonly available hormones, responsible for flowering in plant body are auxins, gibberellins, cytokinins, ethylene, abscisic acid. Therefore, the present investigation was under taken by using plant growth regulators
"There's also some cool and unique organic acids, like abscisic acid, which helps insulin homeostasis and malic acid," she adds.