Journal
PLANT CELL AND ENVIRONMENT
Volume 35, Issue 4, Pages 760-769Publisher
WILEY
DOI: 10.1111/j.1365-3040.2011.02449.x
Keywords
cavitation; drought stress; transpiration; water potential
Categories
Funding
- NSF [IOB-0544470]
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [919871] Funding Source: National Science Foundation
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Hydraulic conductance of leaves (Kleaf) typically decreases with increasing water stress and recent studies have proposed different mechanisms responsible for decreasing Kleaf. We measured Kleaf concurrently with ultrasonic acoustic emissions (UAEs) in dehydrating leaves of several species to determine whether declining Kleaf was associated with xylem embolism. In addition, we performed experiments in which the surface tension of water in the leaf xylem was reduced by using a surfactant solution. Finally, we compared the hydraulic vulnerability of entire leaves with the leaf lamina in three species.
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