Freezing tolerance
nounPronunciation: /ˈfriːzɪŋ ˈtɒlərəns/
The physiological capacity of organisms to survive intracellular and extracellular ice crystal formation without sustaining lethal cellular damage through specialized adaptations. Key mechanisms include cell wall reinforcement, cryoprotectant production, and controlled extracellular ice nucleation.
Plain English
The ability to endure ice formation inside and around plant cells during freezing temperatures without dying.
Etymology & History
Usage
"Arctic plant species develop freezing tolerance through increased cell wall thickness and accumulation of protective sugars."
Style guide notes: Use 'freezing-tolerant' as adjective; distinguish from 'freeze-tolerant' which is less precise scientifically.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How do plants prevent intracellular ice formation?
Through ice nucleation proteins that promote extracellular ice formation, protecting intracellular structures from damaging ice crystals.
What role do sugars play in freezing tolerance?
Sugars lower freezing points, reduce ice crystal size, and protect cellular components through osmotic and direct chemical interactions.
Why Test Candidates on This?
Essential topic in plant physiology, environmental adaptation, and cold-climate plant biology assessments.
Required skill level: Mid