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Creator:: Pruyn, Michele L., Gartner, Barbara L., and Harmon, Mark E.
Abstract:: • A technique for measuring in vitro respiration was investigated to understand why rates were higher than those reported in vivo and to elucidate trends within mature Pseudotsuga menziesii (Douglas‐fir) trees. • Extracted increment cores were divided into 3–4 radial depths and a gas chromatograph was used to compare respiration...
Resource Type:: Article
Full Text:: Pseudotsuga menziesii (Douglas-fir) trees Michele L. Pruyn 1 , Barbara L. Gartner 1

Creator:: Johnson, G. R. and Gartner, Barbara L.
Abstract:: Douglas-fir trees from 39 open-pollinated families at four test locations were assessed to estimate heritability of modulus of elasticity (MOE) and basic density. After trees were felled, sound velocity was measured on 4-m logs with the Director HM200. Disks were taken to estimate dry and green wood density; dynamic MOE...
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Full Text:: variance (ahi l , ) instead of four because open-pollinated Douglas-fir progenies are expected to be

Creator:: Renninger, Heidi J., Gartner, Barbara L., and Grotta, Amy T.
Abstract:: The width of earlywood and latewood in conifer xylem may have a profound effect on water transport and storage, vulnerability to embolism, and wood strength, yet the controls over the timing of latewood formation are unclear. Tracheids differentiating in the cambial zone are influenced by IAA indole-3 acetic acid, the...
Resource Type:: Article
Full Text:: , Gartner & Grotta — Latewood formation in Douglas-fir Eklund, L., C.H.A. Little & R.T. Riding. 1998

Creator:: Gartner, Barbara L., North, Eric M., Johnson, G. R., and Singleton, Ryan
Abstract:: It would be valuable economically to know what are the biological triggers for formation of mature wood (currently of high value) and (or) what maintains production of juvenile wood (currently of low value), to develop silvicultural regimes that control the relative production of the two types of wood. Foresters commonly...
Resource Type:: Article
Full Text:: density and growth in Douglas-fir Barbara L. Gartner, Eric M. North, G.R. Johnson, and Ryan Singleton

Creator:: Domec, Jean-Christophe, Meinzer, Frederick C., Gartner, Barbara L., and Woodruff, D.
Abstract:: We determined the axial and radial xylem tension gradients in trunks of young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees. Axial specific conductivity (ks-a) and sap flux density (Js) were measured at four consecutive depths within the sapwood at a stem height of 1 m. By definition, at a given position...
Resource Type:: Article

Creator:: Spicer, Rachel and Gartner, Barbara L.
Abstract:: • Compression wood has been shown to reduce stem permeability, but it is not known to what extent it affects leaf‐level processes. Here, we report whole‐plant hydraulic properties of Douglas‐fir (Pseudotsuga menziesii) seedlings induced to form varying amounts of compression wood. • Seedlings were grown under three bending treatments to...
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Full Text:: Research Blackwell Science, Ltd Compression wood has little impact on the water relations of Douglas-fir

Creator:: Johnson, G. R., Gartner, Barbara L., Maguire, Doug, and Kanaskied, Alan
Abstract:: Wood density, moisture content, tracheid width and cell wall size were examined in trees from plots that were sprayed for 5 years with chlorothalonil (Bravo®) fungicide to reduce the impact of Swiss needle cast (SNC) and from trees in adjacent unsprayed plots. The unsprayed (more heavily diseased) trees had significantly...
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Full Text:: density and moisture content of Swiss needle cast affected Douglas-fir trees G.R. J o h n s o n

Creator:: Peterson, M. G., Dietterich, H. R., and Lachenbruch, Barbara
Abstract:: We sampled boles, branches, and roots of four Douglas-fir (Pseudotsuga menziesii var. menziesii) trees to learn a) whether branches and roots have a zone of juvenile wood, defined as a zone with progressive changes in wood density and/or tracheid length from the pith outward at successively greater cambial ages, and...
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Full Text:: .—DO DOUGLAS-FIR BRANCHES AND ROOTS HAVE JUVENILE WOOD? 659 MOTT, L., L. H. GROOM, AND S. M. SHALER

Creator:: Woodruff, David R., McCulloh, Katherine A., Warren, Jeffrey M., Meinzer, Frederick C., and Lachenbruch, Barbara
Abstract:: This study investigated the mechanisms involved in the regulation of stomatal closure in Douglas-fir and evaluated the potential impact of compensatory adjustments in response to increasing tree height upon these mechanisms. In the laboratory, we measured leaf hydraulic conductance (Kleaf) as leaf water potential (Yl) declined for comparison with in...
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Full Text:: Douglas-fir DAVID R. WOODRUFP2, KATHERINE A. MCCULLOH23, JEFFREY M. WARREN', FREDERICK C. MEINZER1

Creator:: Lachenbruch, Barbara, Johnson, G. R., Downes, G., and Evans, R.
Abstract:: The relative importance of density, acoustic velocity, and microfibril angle (MFA) for the prediction of the stiffness (MOE) and strength (MOR) has not been well established for Douglas-fir (Pseudotsuga menziesii). MOE and MOR of small clear specimens of mature wood were better predicted by density and velocity than by either...
Resource Type:: Article
Full Text:: sound velocity with stiffness and strength in mature wood of Douglas-fir B. Lachenbruch, G.R. Johnson

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