Browsing Smithsonian Tropical Research Institute by Author "McCulloch, Katherine A."

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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

Johnson, Daniel M.; Woodruff, David R.; McCulloch, Katherine A.; Meinzer, Frederick C. (2009)

Adequate leaf hydraulic conductance (Kleaf) is critical for preventing transpiration-induced desiccation and subsequent stomatal closure that would restrict carbon gain. A few studies have reported midday depression of ...
Moving water well: comparing hydraulic efficiency in twigs and trunks of coniferous, ring-porous, and diffuse-porous saplings from temperate and tropical forests

McCulloch, Katherine A.; Sperry, John S.; Lachenbruch, Barbara; Meinzer, Frederick C.; Reich, Peter B.; Voelker, Steven (2010)

Coniferous, diffuse-porous and ring-porous trees vary in their xylem anatomy, but the functional consequences of these differences are not well understood from the scale of the conduit to the individual. Hydraulic and ...
Xylem hydraulic safety margins in woody plants: Coordination of stomatal control of xylem tension with hydraulic capacitance

Meinzer, Frederick C.; Johnson, Daniel M.; Lachenbrunch, Barbara; McCulloch, Katherine A.; Woodruff, David R. (2009)

1. The xylem pressure inducing 50% loss of hydraulic conductivity due to embolism (P50) is widely used for comparisons of xylem vulnerability among species and across aridity gradients. However, despite its utility as an ...

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