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  1. Transgenic poplars with reduced lignin show impaired xylem conductivity, growth efficiency and survival

    We studied xylem anatomy and hydraulic architecture in 14 transgenic insertion events and a control line of hybrid poplar (Populus spp.) that varied in lignin content. Transgenic events had different levels of down-regulation of two genes encoding 4-coumarate:coenzyme A ligase (4CL). Two-year-old trees were characterized after...

    Author(s):
    Steven L. Voelker; Barbara Lachenbruch; Frederick C. Meinzer; Peter Kitin; Steven H. Strauss
    Year:
    2011
    Keywords:
    biomass, cavitation, embolism, hydraulic architecture, leaf area, moisture content, P50, sapwood area, shoot dieback, xylem
    Source:
    Plant, Cell and Environment. 34: 655-668

  2. Growth responses of Populus tremuloides clones to interacting elevated carbon dioxide and tropospheric ozone

    The Intergovernmental Panel of Climate Change (IPCC) has concluded that the greenhouse gases carbon dioxide (CO2) and tropospheric ozone (O3) are increasing concomitantly globally. Little is known about the effect of these interacting gases on growth, survival, and productivity of forest ecosystems. In this study we assess...

    Author(s):
    J. G. Isebrands; E. P. McDonald; E. Kruger; G. Hendrey; K. Percy; K. Pregitzer; J. Sober; D. F. Karnosky
    Year:
    2001
    Keywords:
    Global climate change, Aspen, Shoot dieback, FACE, CO2, O3
    Source:
    Environmental Pollution 115:359?371
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