Cryoprotectant compound
noun phrasePronunciation: /ˌkraɪoʊˈproʊtektənt ˈkɑːmpaʊnd/
A soluble organic molecule such as proline, glycerol, or trehalose that accumulates in plant tissues to prevent ice crystal formation and cellular damage during freezing stress. These compounds protect protein structures and maintain cell membrane fluidity at sub-zero temperatures.
Plain English
Natural chemicals that plants produce to prevent ice damage and protect cells during freezing conditions.
Etymology & History
Usage
"Alpine plants accumulated cryoprotectant compounds before winter to survive sub-zero temperatures."
Style guide notes: Distinguish concentration-dependent mechanisms from colligative properties when discussing protective mechanisms.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What are common cryoprotectant compounds in plants?
Proline, glycerol, trehalose, and glucose act as natural antifreeze molecules in cold-stressed plants.
How do these compounds prevent freezing damage?
They lower freezing point, reduce ice crystal size, and stabilize proteins and membrane structures.
Why Test Candidates on This?
Important for specialized cold-stress and alpine ecology research; less frequent in general abiotic stress surveys.
Required skill level: Senior