Heat stress
nounPronunciation: /hiːt stres/
Physiological condition induced by temperatures exceeding optimal range for plant growth, leading to protein denaturation, membrane fluidity disruption, and compromised enzymatic function. Prolonged heat stress triggers programmed cell death pathways and reproductive failure.
Plain English
Damage to plants when temperatures become too high for normal functioning.
Etymology & History
Usage
"Climate change intensifies heat stress frequency, necessitating development of thermotolerant crop varieties."
Style guide notes: Hyphenate 'heat-stressed' when used as compound adjective; specify temperature values when possible.
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Related Terms
Frequently Asked Questions
How do plants respond to acute heat stress?
Heat shock proteins activate, stomata close, photosynthesis declines, and protective compounds accumulate rapidly.
What temperature threshold triggers heat stress responses?
Thresholds vary by species; typically 5-10°C above optimal growth temperature initiates stress responses.
Why Test Candidates on This?
Critical for predicting crop productivity under elevated temperature conditions in future climate scenarios.
Required skill level: Mid