Abscisic acid-dependent signaling
noun phrasePronunciation: /ˌæbˈsɪzɪk ˈæsɪd dɪˈpendənt ˈsɪɡnəlɪŋ/
The hormone-mediated intracellular communication pathway activated by abscisic acid that triggers adaptive responses to abiotic stresses including drought, cold, and salinity. This signaling cascade regulates stomatal closure, root growth, and expression of stress-protective genes.
Plain English
The chemical messaging system plants use when abscisic acid hormone signals cells to respond to environmental stress.
Etymology & History
Usage
"Abscisic acid-dependent signaling rapidly closes stomata within minutes of soil water deficit detection."
Style guide notes: Always spell out 'abscisic acid' on first mention before using 'ABA' abbreviation; maintain parallel structure with other hormone pathways.
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Frequently Asked Questions
How quickly does abscisic acid-dependent signaling respond to drought?
Stomatal closure via ABA signaling occurs within minutes of water stress detection in leaves and roots.
What genes are activated by abscisic acid-dependent signaling?
ABA signaling activates stress-protective genes encoding osmolytes, LEA proteins, and detoxification enzymes.
Why Test Candidates on This?
Essential examination content for plant hormone systems, stress adaptation mechanisms, and comparative signaling pathway analysis.
Required skill level: Mid