Cavitation vulnerability
nounPronunciation: /ˌkævɪˈteɪʃən ˈvʌlnərəbɪlɪti/
The susceptibility of a plant's xylem vessels to form gas-filled cavities (air embolisms) when water potential drops below critical thresholds. This determines a species' capacity to resist xylem embolism formation during water stress.
Plain English
The ease with which air bubbles form in plant water-conducting tubes when water becomes scarce.
Etymology & History
Usage
"Species with high cavitation vulnerability experience xylem dysfunction more readily during severe drought events."
Style guide notes: Specify measurement units (MPa) when reporting cavitation vulnerability thresholds in technical literature.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What causes cavitation in plant xylem?
Water tension in xylem vessels can break, allowing air to enter and form bubbles that block water transport.
Why is cavitation vulnerability important for species selection?
Species with low cavitation vulnerability are more drought-tolerant and better suited for arid environments.
Why Test Candidates on This?
Frequently examined in advanced plant water relations and drought ecology curricula.
Required skill level: Senior