Cuticular transpiration reduction
nounPronunciation: /kjuːˈtɪkjʊlər ˌtrænspɪˈreɪʃən rɪˈdʌkʃən/
The physiological and structural modification of the plant cuticle during stress conditions to minimize non-stomatal water loss through the epidermis. This involves altered cutin composition, increased cuticle thickness, and enhanced hydrophobicity of the waxy surface layer.
Plain English
Structural changes to the plant's outer protective layer that reduce water loss through the leaf surface during drought stress.
Etymology & History
Usage
"Cuticular transpiration reduction contributed approximately thirty percent of the total drought-avoidance strategy in xerophytic plant species."
Style guide notes: Clearly specify measurement conditions (leaf age, developmental stage) when reporting cuticular transpiration rates.
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Frequently Asked Questions
What structural changes reduce cuticular transpiration during drought?
Increased cuticle thickness, enhanced wax deposition, and cutin reorganization reduce water vapor diffusion across epidermis.
What percentage of water loss is cuticular versus stomatal?
Under unstressed conditions, cuticular loss is typically five to ten percent; it increases substantially when stomata close.
Why Test Candidates on This?
Assessed through gravimetric water loss measurements and infrared imaging; important for understanding drought tolerance mechanisms.
Required skill level: Senior