Lignification acceleration under stress
noun phrasePronunciation: /lɪɡnɪfɪˈkeɪʃən ækˈseləˈreɪʃən ˈʌndər ˈstres/
The rapid increase in lignin synthesis and deposition in plant cell walls during abiotic stress, which strengthens structural integrity and reduces water loss through increased cell wall rigidity. This response is regulated by phenylpropanoid pathway enzymes and stress-responsive transcription factors.
Plain English
Plants quickly build up lignin, a tough cell wall material, to strengthen tissues and reduce water loss when stressed.
Etymology & History
Usage
"Lignification acceleration under water stress contributed to the improved structural stability observed in salt-tolerant wheat genotypes."
Style guide notes: Include reference to specific stress type (drought, salt, cold) when mentioning lignification acceleration for improved clarity.
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Frequently Asked Questions
How does lignification reduce water loss in stressed plants?
Increased lignin content stiffens and seals cell walls, reducing cuticle permeability and decreasing transpirational water loss.
What enzymes regulate lignification during stress?
Phenylalanine ammonia-lyase, cinnamyl alcohol dehydrogenase, and peroxidases are key enzymes controlling lignin synthesis under stress.
Why Test Candidates on This?
Evaluated in advanced plant physiology and biomechanics research within crop stress resilience studies.
Required skill level: Senior