Leaf hydraulic conductance, measured in situ, declines and recovers daily: leaf hydraulics, water potential and stomatal conductance in four temperate and three tropical tree species

Daniel Johnson; David R. Woodruff; Katherien A. McCulloh; Frederick Meinzer

doi:10.1093/treephys/tpp031

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Leaf hydraulic conductance, measured in situ, declines and recovers daily: leaf hydraulics, water potential and stomatal conductance in four temperate and three tropical tree species

Formally Refereed

Authors:

Daniel Johnson, David R. Woodruff, Katherien A. McCulloh, Frederick Meinzer

Year:

2009

Type:

Scientific Journal

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.1093/treephys/tpp031

Source:

Tree Physiology

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Download (PDF 2.28 MB): https://research.fs.usda.gov/download/treesearch/34943.pdf

Abstract

The objectives of this study were to measure K_leaf, using a rehydration kinetics method, (1) in the laboratory (under controlled conditions) across a range of water potentials to construct vulnerability curves (VC) and (2) over the course of the day in the field along with leaf water potential and stomatal conductance. The results presented here, from the previous work of the authors and from other published studies, were consistent with two different strategies regarding daily maintenance of K_leaf: (1) substantial loss and subsequent recovery or (2) a more conservative strategy of loss avoidance.

Keywords

cavitation, embolism, photosynthesis, transpiration, xylem

Citation

Johnson, Daniel M.; Woodruff, David R.; McCulloh, Katherien A.; Meinzer, Frederick C. 2009. Leaf hydraulic conductance, measured in situ, declines and recovers daily: leaf hydraulics, water potential and stomatal conductance in four temperate and three tropical tree species. Tree Physiology. 29: 879-887.