Phenolic compound accumulation
nounPronunciation: /fɪˈnoʊlɪk ˈkɒmpaʊnd əˌkjuːmjəˈleɪʃən/
The increased synthesis and accumulation of phenolic secondary metabolites in plant tissues in response to abiotic stress, including flavonoids, phenolic acids, and lignin precursors. These compounds function as antioxidants and provide structural reinforcement under environmental stress.
Plain English
Build-up of protective plant chemicals that reduce damage from stress and strengthen plant tissues.
Etymology & History
Usage
"Phenolic compound accumulation in grapevine leaves increased substantially under moderate water deficit, improving UV protection and oxidative stress tolerance."
Style guide notes: Specify phenolic subclass when discussing mechanism; distinguish antioxidant vs. structural roles.
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Frequently Asked Questions
Which phenolic compounds accumulate most rapidly under drought stress?
Flavonoids and phenolic acids show quickest increases; lignin accumulation occurs over longer timescales in structural tissues.
How do phenolic compounds provide stress protection beyond antioxidant activity?
Phenolics cross-link cell wall polymers, reducing permeability and protecting against pathogen infiltration during stress periods.
Why Test Candidates on This?
Important for understanding plant defensive chemistry and physiological acclimation mechanisms under multiple abiotic stresses.
Required skill level: Mid