Hydraulic conductivity loss
nounPronunciation: /haɪˈdrɔːlɪk kənˈdʌktɪvɪti lɒs/
A reduction in the plant's ability to transport water through the xylem and other tissues, caused by embolism formation or decreased vascular pathway availability under stress conditions. This directly impairs water delivery to leaves and growing tissues.
Plain English
The decrease in a plant's ability to move water through its vascular system during stress, reducing water availability to tissues.
Etymology & History
Usage
"Hydraulic conductivity loss was the primary mechanism limiting photosynthesis under severe drought conditions."
Style guide notes: Specify whether loss is reversible (embolism refilling) or permanent when discussing plant recovery post-stress.
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Related Terms
Frequently Asked Questions
What causes hydraulic conductivity loss in drought-stressed plants?
Xylem embolism, decreased aquaporin expression, and vessel collapse reduce the plant's water transport efficiency.
How does this condition affect plant survival during drought?
Reduced water transport prevents adequate hydration of leaves, limiting photosynthesis and growth until water availability improves.
Why Test Candidates on This?
Heavily tested in advanced physiology and water relations assessments, particularly in drought and freezing stress contexts.
Required skill level: Senior