Abscisic Acid Accumulation Pathway
nounPronunciation: /ˌæbsɪˈsɪzɪk ˈæsɪd əˌkjuːmjəˈleɪʃən ˈpæθˌweɪ/
The biosynthetic and signaling cascade leading to increased abscisic acid concentration in plant tissues during abiotic stress perception and response. This hormone orchestrates multiple physiological adjustments including stomatal closure, gene expression changes, and growth suppression.
Plain English
The biological process that increases the stress hormone abscisic acid in plants to trigger protective responses.
Etymology & History
Usage
"The abscisic acid accumulation pathway was rapidly activated within 30 minutes of imposing drought stress."
Style guide notes: Distinguish between ABA biosynthesis, catabolism, and conjugation when discussing accumulation mechanisms.
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Frequently Asked Questions
Where is abscisic acid primarily synthesized in stressed plants?
Primarily in roots and leaves, with transport to guard cells and other target tissues.
What are the main targets of ABA signaling?
Guard cells for stomatal closure, vascular tissues for hydraulic adjustments, and gene regulatory elements for stress response.
Why Test Candidates on This?
Essential for understanding how plants perceive and respond to abiotic stress at the molecular level.
Required skill level: Mid