Cuticle thickness modulation
nounPronunciation: /ˈkjuːtɪkəl ˈθɪknəs ˌmɒdjuːˈleɪʃən/
The dynamic adjustment of the waxy or cutin-based protective layer covering plant leaves and stems in response to environmental stress, particularly drought and UV radiation. Increased cuticle thickness provides enhanced water retention and radiation protection, though it may reduce gas exchange efficiency.
Plain English
The plant's ability to thicken its protective waxy leaf coating when facing harsh environmental conditions.
Etymology & History
Usage
"Cuticle thickness modulation in drought-adapted species reduces transpirational water loss while maintaining sufficient photosynthetic capacity."
Style guide notes: Specify which stress conditions triggered modulation and distinguish between cutin deposition and wax accumulation mechanisms.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How does increased cuticle thickness help drought-stressed plants?
Thicker waxy coatings reduce water evaporation from leaf surfaces, conserving moisture in dry conditions.
Does cuticle thickening affect photosynthesis?
Excessive cuticle buildup can slightly reduce light penetration and CO2 absorption, creating a trade-off with water conservation.
Why Test Candidates on This?
Relevant for understanding long-term physiological adaptations in plants exposed to chronic abiotic stress in arid regions.
Required skill level: Expert