Frost hardiness
nounPronunciation: /frɔːst ˈhɑːrdɪnəs/
The capacity of plant tissues to survive subfreezing temperatures without experiencing lethal ice crystal formation that causes cellular rupture. Frost hardiness develops through cold acclimation processes involving cell wall strengthening and cryoprotective compound accumulation.
Plain English
Plants can survive freezing temperatures without their cells being damaged by ice crystals.
Etymology & History
Usage
"Alpine plants develop superior frost hardiness through seasonal cold acclimation mechanisms."
Style guide notes: Hyphenate when used as adjective: 'frost-hardy plants'; use as noun without hyphen.
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Frequently Asked Questions
What physiological changes increase frost hardiness?
Cold acclimation increases solute concentration, strengthens cell walls, and produces antifreeze-like proteins protecting cells.
Can annual plants develop frost hardiness?
Some annuals show limited frost hardiness, but perennials and woody plants typically develop superior cold tolerance mechanisms.
Why Test Candidates on This?
Essential for plant breeding, agricultural adaptation strategies, and understanding temperate ecosystem survival mechanisms.
Required skill level: Mid