Chilling-induced necrosis
nounPronunciation: /ˈtʃɪlɪŋ ɪnˈduːst nɪˈkroʊsɪs/
Cell death and tissue browning resulting from exposure to non-freezing temperatures (typically 0-15°C) that disrupts cellular organization and metabolic processes. This stress response is particularly severe in tropical and subtropical plants lacking cold acclimation capacity.
Plain English
Plant tissue death and browning caused by exposure to cold temperatures above freezing that disrupt normal cell function.
Etymology & History
Usage
"Chilling-induced necrosis in tomato seedlings appeared within 48 hours of exposure to 5°C, indicating poor cold tolerance."
Style guide notes: Specify temperature range and exposure duration when describing chilling conditions; distinguish from freeze-thaw injury mechanisms.
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Related Terms
Frequently Asked Questions
How does chilling differ from freezing injury in plants?
Chilling occurs above freezing point causing metabolic disruption, while freezing causes ice crystal formation and cell rupture at sub-zero temperatures.
Which plant species are most susceptible to chilling-induced necrosis?
Tropical and subtropical crops like tomatoes, peppers, eggplants, and cucumbers lack cold acclimation mechanisms and show severe chilling sensitivity.
Why Test Candidates on This?
Important for crop breeding programs targeting improved cold tolerance in chilling-sensitive species and understanding post-harvest produce deterioration.
Required skill level: Mid