Thermal tolerance threshold
noun phrasePronunciation: /ˈθɜːrməl ˈtɒlərəns ˈθreʃhəʊld/
The maximum or minimum temperature at which an organism can maintain essential physiological functions and survive. This threshold varies by species, developmental stage, and prior acclimation history.
Plain English
The extreme temperature limit beyond which a plant cannot survive or function normally.
Etymology & History
Usage
"The thermal tolerance threshold of wheat decreased following exposure to early-season frost events."
Style guide notes: Specify whether discussing upper or lower thermal tolerance threshold when context is ambiguous.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How is thermal tolerance threshold measured in research?
Using electrolyte leakage assays, chlorophyll fluorescence, or survival rate measurements at increasing temperatures.
Can thermal tolerance thresholds change during a plant's lifetime?
Yes, through thermal acclimation processes that adjust thresholds based on prior temperature exposure.
Why Test Candidates on This?
Critical assessment point in climate adaptation and crop breeding resilience studies.
Required skill level: Mid