Hydraulic conductivity
nounPronunciation: /haɪˈdrɔːlɪk kənˌdʌkˈtɪvəti/
The capacity of plant tissues and xylem vessels to transport water in response to water potential gradients, quantified as the volume of water moving per unit time per unit driving force. This property is critical for maintaining long-distance water transport and preventing hydraulic failure during drought.
Plain English
A measure of how easily water moves through plant tissues and vessels.
Etymology & History
Usage
"Hydraulic conductivity of root xylem decreases under osmotic stress due to vessel embolism and pit aspiration."
Style guide notes: Always specify whether measuring whole-plant, root, shoot, or tissue-specific hydraulic conductivity.
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Frequently Asked Questions
What causes reduction in hydraulic conductivity during drought?
Air bubbles (embolism) form in xylem vessels, blocking water movement and reducing transport efficiency.
How is hydraulic conductivity measured?
Using high-pressure flow meters that measure water volume transported under controlled pressure gradients.
Why Test Candidates on This?
Core concept in plant water relations and increasingly important in climate-stress vulnerability assessments.
Required skill level: Senior