%0 Journal Article %1 citeulike:3201070 %A Woodruff, D. R. %A Meinzer, F. C. %A Lachenbruch, B. %C USDA Forest Service, Forestry Sciences Laboratory, Corvallis, OR 97331, USA; ; Forest Science Department, Oregon State University, Corvallis, OR 97331, USA; ; Department of Wood Science and Engineering, Oregon State University, Corvallis, OR 97331, USA %D 2008 %I Blackwell Publishing %J New Phytologist %K citeulikeExport trees, xylem %N 1 %P 90--99 %R 10.1111/j.1469-8137.2008.02551.x %T Height-related trends in leaf xylem anatomy and shoot hydraulic characteristics in a tall conifer: safety versus efficiency in water transport %U http://dx.doi.org/10.1111/j.1469-8137.2008.02551.x %V 180 %X Hydraulic vulnerability of Douglas-fir (Pseudotsuga menziesii) branchlets decreases with height, allowing shoots at greater height to maintain hydraulic conductance (Kshoot) at more negative leaf water potentials (03A8l). To determine the basis for this trend shoot hydraulic and tracheid anatomical properties of foliage from the tops of Douglas-fir trees were analysed along a height gradient from 5 to 55 m. Values of 03A8l at which Kshoot was substantially reduced, declined with height by 0.012 Mpa m22121. Maximum Kshoot was reduced by 0.082 mmol m22122 MPa22121 s22121 for every 1 m increase in height. Total tracheid lumen area per needle cross-section, hydraulic mean diameter of leaf tracheid lumens, total number of tracheids per needle cross-section and leaf tracheid length decreased with height by 18.4 µm2 m22121, 0.029 µm m22121, 0.42 m22121 and 5.3 µm m22121, respectively. Tracheid thickness-to-span ratio (tw/b)2 increased with height by 1.04 נ1022123 m22121 and pit number per tracheid decreased with height by 0.07 m22121. Leaf anatomical adjustments that enhanced the ability to cope with vertical gradients of increasing xylem tension were attained at the expense of reduced water transport capacity and efficiency, possibly contributing to height-related decline in growth of Douglas fir. New Phytologist (2008) 18090201399No claim to original US government works. Journal compilation \copyrightNew Phytologist (2008)doi: 10.1111/j.1469-8137.2008.02551.x

@article{citeulike:3201070, abstract = {{Hydraulic vulnerability of Douglas-fir (Pseudotsuga menziesii) branchlets decreases with height, allowing shoots at greater height to maintain hydraulic conductance (Kshoot) at more negative leaf water potentials (03A8l). To determine the basis for this trend shoot hydraulic and tracheid anatomical properties of foliage from the tops of Douglas-fir trees were analysed along a height gradient from 5 to 55 m. Values of 03A8l at which Kshoot was substantially reduced, declined with height by 0.012 Mpa m22121. Maximum Kshoot was reduced by 0.082 mmol m22122 MPa22121 s22121 for every 1 m increase in height. Total tracheid lumen area per needle cross-section, hydraulic mean diameter of leaf tracheid lumens, total number of tracheids per needle cross-section and leaf tracheid length decreased with height by 18.4 µm2 m22121, 0.029 µm m22121, 0.42 m22121 and 5.3 µm m22121, respectively. Tracheid thickness-to-span ratio (tw/b)2 increased with height by 1.04 נ1022123 m22121 and pit number per tracheid decreased with height by 0.07 m22121. Leaf anatomical adjustments that enhanced the ability to cope with vertical gradients of increasing xylem tension were attained at the expense of reduced water transport capacity and efficiency, possibly contributing to height-related decline in growth of Douglas fir. New Phytologist (2008) 18090201399No claim to original US government works. Journal compilation {\copyright}New Phytologist (2008)doi: 10.1111/j.1469-8137.2008.02551.x}}, added-at = {2019-03-31T01:14:40.000+0100}, address = {USDA Forest Service, Forestry Sciences Laboratory, Corvallis, OR 97331, USA; ; Forest Science Department, Oregon State University, Corvallis, OR 97331, USA; ; Department of Wood Science and Engineering, Oregon State University, Corvallis, OR 97331, USA}, author = {Woodruff, D. R. and Meinzer, F. C. and Lachenbruch, B.}, biburl = {https://www.bibsonomy.org/bibtex/2e14ea332f505c18d350926cf05938eec/dianella}, citeulike-article-id = {3201070}, citeulike-linkout-0 = {http://dx.doi.org/10.1111/j.1469-8137.2008.02551.x}, citeulike-linkout-1 = {http://www.ingentaconnect.com/content/bsc/nph/2008/00000180/00000001/art00011}, citeulike-linkout-2 = {http://www3.interscience.wiley.com/cgi-bin/abstract/120747960/ABSTRACT}, doi = {10.1111/j.1469-8137.2008.02551.x}, interhash = {5563866b517c50feaec8e95d5870e3a5}, intrahash = {e14ea332f505c18d350926cf05938eec}, issn = {1469-8137}, journal = {New Phytologist}, keywords = {citeulikeExport trees, xylem}, month = oct, number = 1, pages = {90--99}, posted-at = {2010-02-02 07:52:20}, priority = {2}, publisher = {Blackwell Publishing}, timestamp = {2019-03-31T01:16:26.000+0100}, title = {{Height-related trends in leaf xylem anatomy and shoot hydraulic characteristics in a tall conifer: safety versus efficiency in water transport}}, url = {http://dx.doi.org/10.1111/j.1469-8137.2008.02551.x}, volume = 180, year = 2008 }