Cell wall thickening
nounPronunciation: /sɛl wɔːl ˈθɪkənɪŋ/
An increase in cell wall thickness and structural reinforcement through enhanced cellulose, hemicellulose, and lignin deposition during stress exposure. This mechanical strengthening improves cell rigidity and resistance to plasmolysis, particularly important under osmotic stresses.
Plain English
Plants strengthen their cell walls by adding more structural material when exposed to environmental stress.
Etymology & History
Usage
"Cell wall thickening observed in salt-stressed wheat provided mechanical support and reduced water loss through epidermal cells."
Style guide notes: Use 'cell wall thickening' as standard; 'wall thickening' is acceptable for brevity in established contexts.
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Contrasted with
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Frequently Asked Questions
How does cell wall thickening help plants survive stress?
Thicker walls provide mechanical support against osmotic pressure changes and reduce water permeability during drought.
Which wall components increase most during stress-induced thickening?
Cellulose, hemicellulose, and especially lignin increase significantly, providing structural reinforcement.
Why Test Candidates on This?
Less commonly tested than osmotic adjustment but important for comprehensive understanding of structural stress adaptations in plants.
Required skill level: Senior