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    Author(s): D.R. Woodruff; K.A. McCulloh; J.M. Warren; F.C. Meinzer; B.L. Gartner
    Date: 2007
    Source: Plant, Cell and Environment. 30: 559-569
    Publication Series: Scientific Journal (JRNL)
    PDF: Download Publication  (1.98 MB)


    We investigated the mechanisms involved in the regulation of stomatal closure in Douglas-fir and evaluated the potential compensatory adjustments in response to increasing tree height. Stomatal closure was initiated at values of leaf water potential corresponding to nearly complete loss of leaf hydraulic conductance. Cryogenic scanning electron microscopic images showed that relative abundance of embolized tracheids in the central vein increased with increasing leaf water stress. Leaf embolism appeared to be coupled to changes in stomatal conductance and may perform a vital function in stomatal regulation of plant water status and water transport in conifers.

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    Woodruff, D.R.; McCulloh, K.A.; Warren, J.M.; Meinzer, F.C.; Gartner, B.L. 2007. Impacts of tree height on leaf hydraulic architecture and stomatal control in Douglas-fir. Plant, Cell and Environment. 30: 559-569


    Leaf hydraulic conductance, stomatal conductance, growth limitation, water stress, Pseudotsuga menziesii

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