Embolism formation
nounPronunciation: /ˈɛmbəlɪzəm ˈfɔːrmeɪʃən/
The process by which air bubbles form and expand within xylem vessels, disrupting water column continuity and blocking water transport through plant vascular tissues. Embolism frequently occurs under drought or freeze-thaw stress conditions, significantly reducing plant hydraulic conductivity.
Plain English
Air pockets form in plant water-conducting tubes during stress, blocking water movement.
Etymology & History
Usage
"Vulnerability to embolism formation in xylem vessels determines drought tolerance limits in woody species."
Style guide notes: Use 'xylem embolism' or 'cavitation' interchangeably; embolism formation specifically denotes the process.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How does embolism form in xylem vessels?
When water potential drops below critical thresholds, dissolved air comes out of solution and forms bubbles.
Can plants recover from xylem embolism?
Some species can refill embolized vessels using root pressure or stored sugars, restoring hydraulic conductivity.
Why Test Candidates on This?
Important in advanced plant physiology and ecological stress tolerance research assessments.
Required skill level: Senior