Frost Tolerance Threshold Temperature
nounPronunciation: /frɔːst ˈtɑːlərəns ˈθreʃˌhoʊld ˈtɛmpərətʃər/
The critical minimum temperature at which a plant species or genotype begins to experience irreversible cellular damage from ice crystal formation in tissues. This threshold varies among species and within populations based on cold acclimation status and tissue type.
Plain English
The coldest temperature a plant can survive before ice damage kills its cells permanently.
Etymology & History
Usage
"The frost tolerance threshold temperature of the novel genotype was -18°C, compared to -12°C for the susceptible parent."
Style guide notes: Always specify measurement method (electrolyte leakage, visual assessment, infrared imaging) and plant tissue evaluated.
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Related Terms
Frequently Asked Questions
What causes cell death at the frost tolerance threshold?
Ice crystals form inside cells, rupturing membranes and disrupting cellular structures and functions.
Can frost tolerance threshold change seasonally?
Yes, cold acclimation in autumn decreases threshold by several degrees; deacclimation in spring increases it.
Why Test Candidates on This?
Critical for breeding crops adapted to climate zones with late-spring or early-fall frosts.
Required skill level: Expert