Xylem embolism resistance
nounPronunciation: /ˈzaɪləm ˈɛmbəlɪzəm rɪˈzɪstəns/
The ability of a plant's vascular tissue to prevent or recover from the formation of gas-filled cavities (embolisms) in xylem vessels that disrupt water transport under water deficit conditions. This trait is measured by xylem water potential at 50% loss of hydraulic conductivity (P50).
Plain English
A plant's ability to prevent or recover from air bubbles forming in water-conducting tubes during drought.
Etymology & History
Usage
"Oak species with higher xylem embolism resistance survived the severe drought better than susceptible species."
Style guide notes: Use 'xylem embolism resistance' in formal contexts; 'cavitation resistance' acceptable in abbreviated discussion with prior definition.
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Contrasted with
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Frequently Asked Questions
How is xylem embolism resistance measured?
Typically measured as P50 value using vulnerability curves showing water potential at 50% conductivity loss.
What structures increase xylem embolism resistance?
Thicker vessel walls, smaller vessel diameter, and pit membrane characteristics enhance embolism resistance.
Why Test Candidates on This?
Highly relevant for forest ecology, timber quality research, and climate change vulnerability assessments.
Required skill level: Senior