Freezing-induced plasmolysis
nounPronunciation: /ˈfriːzɪŋ ɪnˈdjuːst plæzˈmɒlɪsɪs/
The separation of cell cytoplasm from the cell wall due to ice crystal formation in intercellular spaces during freezing stress. This mechanical separation can cause cellular damage unless protective mechanisms maintain cell viability.
Plain English
The shrinking and separation of plant cell contents from the cell wall when ice crystals form during freezing.
Etymology & History
Usage
"Freezing-induced plasmolysis in woody plants is mitigated by cryoprotective compounds and cell wall elasticity."
Style guide notes: Clarify whether discussing extracellular or intracellular ice formation effects; specify temperature ranges in experimental descriptions.
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Frequently Asked Questions
Why is freezing-induced plasmolysis dangerous?
Cell separation disrupts turgor pressure, damages membranes, and can cause irreversible cell death if too severe or prolonged.
How do plants prevent freezing plasmolysis damage?
Cold-hardy plants accumulate cryoprotective solutes, increase cell wall elasticity, and control ice nucleation sites.
Why Test Candidates on This?
Tested in plant physiology and cold stress biology courses examining winter survival mechanisms and frost tolerance adaptations.
Required skill level: Senior