Cryoprotectant accumulation
nounPronunciation: /ˌkraɪoʊˈproʊtɛktənt əˈkjuːmjəˌleɪʃən/
The increased biosynthesis and sequestration of solutes such as sugars, polyols, and amino acids that lower the freezing point of cell sap and stabilize proteins during cold stress. This mechanism enhances ice nucleation resistance and prevents intracellular ice crystal formation.
Plain English
The buildup of protective chemicals in plant cells that prevent ice crystals from forming and damaging tissues.
Etymology & History
Usage
"Cryoprotectant accumulation in overwintering buds included sorbitol, glucose, and proline as major osmolytes conferring freezing tolerance."
Style guide notes: Identify specific cryoprotectants by chemical name; distinguish from general osmolyte accumulation.
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Frequently Asked Questions
Which cryoprotectants are most effective in plant cells?
Sugars like glucose and sucrose, polyols like sorbitol, and amino acids like proline provide substantial freezing protection.
When do plants accumulate cryoprotectants?
Accumulation occurs during autumn as temperatures decline, preparing tissues for winter frost and freeze events.
Why Test Candidates on This?
Cryoprotectant accumulation is fundamental to understanding freezing tolerance mechanisms and seasonal cold adaptation strategies.
Required skill level: Senior