Xylem Embolism Formation
nounPronunciation: /ˈzaɪləm ˈɛmboʊlɪzəm ˈfɔːrmeɪʃən/
The formation of air bubbles (embolism) in xylem vessels that blocks water transport under conditions of low water availability or tension. This mechanism contributes to hydraulic failure in plants experiencing severe drought or freezing stress.
Plain English
The formation of air pockets in plant water-conducting tubes that stops water from moving through the plant.
Etymology & History
Usage
"Xylem embolism formation limits water availability to leaves during drought, triggering stomatal closure and reduced photosynthesis."
Style guide notes: Distinguish between embolism formation (process) and embolized vessels (state) for precision in technical writing.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How does xylem embolism form in drought?
Decreasing soil water increases tension in xylem vessels, allowing air to enter and form gas bubbles that block water flow.
Can plants recover from xylem embolism?
Some species can refill embolized vessels using root pressure or stored carbohydrates, but recovery depends on species traits.
Why Test Candidates on This?
Critical for understanding plant drought tolerance mechanisms and vulnerability to climate-induced water stress.
Required skill level: Mid