Cuticle permeability threshold
noun phrasePronunciation: /ˈkjuːtɪkəl pərˌmiːəˈbɪlɪti ˈθreʃhoʊld/
The critical water potential or environmental condition at which cuticular wax structures become compromised, allowing excessive transepidermal water loss. This threshold varies among species based on cuticle composition and structural integrity.
Plain English
The point at which a plant's protective waxy outer layer stops effectively preventing water loss.
Etymology & History
Usage
"Cuticle permeability threshold measurements provided insights into desiccation resistance variation among crop cultivars."
Style guide notes: Always specify measurement method (gravimetric or vapor pressure) when reporting threshold values; include genotype information.
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Frequently Asked Questions
How is cuticle permeability threshold measured?
Researchers measure transepidermal water loss rates under controlled humidity and temperature conditions.
Why does cuticle thickness affect the threshold?
Thicker, more wax-rich cuticles maintain impermeability longer under increasing stress conditions.
Why Test Candidates on This?
Important for breeding programs and evaluating physiological mechanisms underlying drought and heat stress tolerance.
Required skill level: Senior