8:00 AM Springer, Clint^*,1, DeLucia, Evan², Thomas, Richard¹, ¹ Department of Biology, Morgantown, WV, USA² Department of Plant Biology, Urbana, IL, USA Photosynthetic responses of four understory tree species after 7 years of CO₂ enrichment in the Duke Forest FACE experiment.

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8:20 AM Corbin, Jeffrey^*,1, Conly, Dana ¹, ¹ University of California, Berkeley, Berkeley, CA, USA Variation in ecophysiological characteristics of Nassella pulchra across a coast-inland gradient in California.

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8:40 AM van Gestel, Natasja^*,1, Nesbit, April¹, Gordon, Elizabeth¹, Nagel, Jennifer¹, Haley, Luke¹, Peffley, Ellen¹, Tissue, David¹, ¹ Department of Biological Sciences - Texas Tech University, Lubbock, TX Effect of continuous light on the physiology and biochemistry of Allium fistulosum and A. cepa.

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9:00 AM Manish, Chintamani^*,1, Peterjohn, William¹, ¹ West Virginia University, Morgantown, WV, USA Interactive effects of UV radiation and water availability on the growth of Quercus rubra seedlings.

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9:20 AM Caird, Mairgareth^*,1, Richards, James¹, ¹ University of California - Davis, Davis, CA, USA Nighttime transpiration: Implications for ecology and agriculture.

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9:40 AM Break.

9:50 AM Pittermann, Jarmila^*,1, Sperry, John¹, ¹ Department of Biology, Salt Lake City, Utah, USA Structure-function tradeoffs associated with xylem embolism resistance in conifer wood.

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10:10 AM Tyler, Anna^*,1, Pockman, William¹, ¹ University of New Mexico, Albuquerque Regional variation in xylem anatomy of Larrea tridentata and its relationship to climate.

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10:30 AM Johnsen, Kurt ¹, Maier, Chris^*,1, Sanchez, Felipe¹, Anderson, Peter¹, Waring, Richard², Linder, Sune³, ¹ Southern Research Station, Research Triangle Park, North Carolina, USA² Department of Forest Science, Corvallis, Oregon, USA³ Southern Swedish Forest Research Centre, Alnarp, Sweden Physiological girdling of pine trees via phloem chilling rapidly decreases soil CO₂ efflux.

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10:50 AM Bhaskar, Radika^*,1, Valiente-Banuet, Alfonso², Ackerly, David¹, ¹ Stanford University, Stanford, CA² Instituto de Ecología, D.F., México, México Evolution of hydraulic traits in mediterranean and non-mediterranean environments.

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11:10 AM Gartner, Barbara ^*,1, Roy, Jacques², ¹ Oregon State University, Corvallis, OR, 97331² CNRS, Montpellier, France Effects of tension wood on water transport and morphology in the evergreen oak Quercus ilex.

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