Hydraulic cavitation vulnerability
nounPronunciation: /haɪˈdrɔːlɪk kævɪˈteɪʃən ˈvʌlnərəbɪlɪti/
The susceptibility of plant vascular tissues to formation and propagation of air embolisms in xylem vessels under water stress, which disrupts water column continuity and prevents nutrient and water transport. This vulnerability varies among species and determines drought tolerance limits.
Plain English
Plants vary in how easily air bubbles form in their water-conducting tubes during dry conditions, blocking water movement.
Etymology & History
Usage
"Species with narrow xylem vessels exhibited lower hydraulic cavitation vulnerability and survived prolonged drought periods."
Style guide notes: Always specify measurement method (P50 values) when reporting cavitation vulnerability comparisons between species.
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Related Terms
Frequently Asked Questions
Why does cavitation occur during drought stress?
Water stress increases negative xylem pressure, causing dissolved air to form bubbles that block water column continuity.
How can plants recover from cavitation?
Plants can refill cavitated vessels through root pressure or stored carbohydrate metabolism to restore water transport.
Why Test Candidates on This?
Critical for understanding species-specific drought tolerance and predicting forest vulnerability to climate change.
Required skill level: Expert