Cryoprotective compounds
nounPronunciation: /ˌkraɪoʊprəˈtektɪv ˈkɒmpaʊndz/
Organic molecules including sugars, polyols, and amino acids that prevent ice crystal formation or minimize cellular damage during freezing stress. These compounds function by lowering freezing point, modifying ice crystal morphology, and stabilizing cellular structures.
Plain English
Protective chemicals that plants produce to prevent ice damage during freezing temperatures.
Etymology & History
Usage
"Cryoprotective compounds accumulate in overwintering buds to enable survival of subzero temperatures in temperate tree species."
Style guide notes: Specify compound type when possible; avoid generic 'antifreeze' terminology in formal publications.
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Frequently Asked Questions
What are common cryoprotective compounds in plants?
Sucrose, glucose, glycerol, sorbitol, and amino acids like proline serve as primary cryoprotective compounds in cold-adapted species.
How do these compounds prevent freeze damage?
They lower the freezing point of cellular solutions, modify ice crystal formation patterns, and stabilize membrane structure during thawing.
Why Test Candidates on This?
Cryoprotective compound analysis is critical for evaluating cold stress tolerance mechanisms in crop breeding and plant physiology research.
Required skill level: Mid