abscisic acid
Very LowTechnical/Scientific
Definition
Meaning
A plant hormone that promotes leaf abscission (detachment), seed dormancy, and responses to environmental stress like drought.
Abscisic acid (ABA) is a key signaling molecule in plant biology, regulating growth, development, and stress adaptation by inhibiting other growth-promoting hormones. It plays a central role in a plant's ability to survive adverse conditions.
Linguistics
Semantic Notes
Despite 'abscisic' being derived from 'abscission', ABA's role in leaf fall is just one of its functions; its primary modern understanding is as a universal stress hormone in plants.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are identical in scientific contexts.
Connotations
Exclusively a precise scientific term with no cultural or colloquial connotations in either variety.
Frequency
Used with equal rarity, exclusively within botany, plant physiology, agriculture, and related scientific fields.
Vocabulary
Collocations
Grammar
Valency Patterns
N is treated with abscisic acidAbscisic acid accumulates in NThe level/concentration of abscisic acid increasesAbscisic acid induces NAbscisic acid-mediated V-ingVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Virtually never used. Might appear in highly technical agricultural biotech reports or patents.
Academic
Core terminology in plant biology, physiology, and agricultural science papers and textbooks.
Everyday
Never used in everyday conversation.
Technical
The primary domain of use. Precise term in botany, horticulture, and plant molecular biology.
Examples
By Part of Speech
verb
British English
- The plant will abscise its leaves.
American English
- The plant will abscise its leaves.
adjective
British English
- The abscisic response was rapid.
American English
- The abscisic response was rapid.
Examples
By CEFR Level
- Plants produce abscisic acid when they don't have enough water.
- During drought, the accumulation of abscisic acid causes stomata to close, reducing water loss.
- The exogenous application of abscisic acid has been shown to enhance the cold tolerance of certain crop varieties by upregulating specific protective genes.
Learning
Memory Aids
Mnemonic
Imagine a plant under stress saying, 'ABSolutely, I'll be SICk' (ABA-sic) and producing this acid to slow down and survive.
Conceptual Metaphor
THE PLANET'S STRESS ALARM: Abscisic acid is conceptualized as a chemical alarm signal that tells the plant to switch into survival/conservation mode.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation of 'acid' as 'кислота' implying a corrosive substance. It's a specific organic compound name.
- The term 'abscisic' is a fixed loanword (абсцизиновая). Do not try to parse or translate it morpheme-by-morpheme.
Common Mistakes
- Misspelling as 'abscissic acid' or 'abscizic acid'.
- Incorrect pronunciation stressing the first syllable (/ˈæbsɪk/).
- Overgeneralizing its function to only leaf fall.
Practice
Quiz
What is the primary modern understanding of abscisic acid's main role?
FAQ
Frequently Asked Questions
No, while historically named for its role in abscission, its primary and more widespread function is as a key hormone in plant stress response (e.g., to drought, cold, salinity).
No, it is a plant-specific hormone. Its biochemistry and target pathways are not present in animals.
The standard abbreviation in scientific literature is ABA.
It is generally classified as a growth inhibitor, as it counteracts the effects of promoting hormones like gibberellins and auxins, especially under stress conditions.