Abscisic acid biosynthesis
nounPronunciation: /ˌæbˈsɪsɪk ˈæsɪd ˌbaɪoʊˈsɪnθəsɪs/
The metabolic pathway involving the sequential enzymatic conversion of carotenoid precursors to abscisic acid (ABA) through key intermediates including 9-cis-violaxanthin and xanthoxin. This process is upregulated under abiotic stress conditions to facilitate rapid ABA accumulation for stress signaling.
Plain English
The series of chemical reactions plants use to produce abscisic acid, a stress hormone that helps them cope with environmental challenges.
Etymology & History
Usage
"Abscisic acid biosynthesis is rapidly initiated in roots upon exposure to water-deficit stress, enabling quick stress signal transmission."
Style guide notes: Always capitalize Abscisic acid when starting term; abbreviate as ABA after first mention for clarity.
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Frequently Asked Questions
What is abscisic acid biosynthesis?
It is the metabolic pathway that produces abscisic acid, a key plant hormone regulating stress responses and adaptation.
When is abscisic acid biosynthesis activated?
The pathway is rapidly activated under abiotic stresses like drought, salt stress, and cold, increasing ABA levels in plant tissues.
Why Test Candidates on This?
Essential knowledge for stress physiology, molecular biology, and plant hormone regulation examinations.
Required skill level: Mid