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Quantitative-genetic variation in morphological and physiological traits within a quaking aspen (Populus tremuloides) population

Creator:: Kanaga, Megan K., Ryel, Ronald J., Mock, Karen E., and Pfrender, Michael E.
Abstract:: Genetic diversity within populations is an important component of adaptive evolution, and recent research has demonstrated that genetic variation within plant populations can have important ecological effects. In this study, we investigate quantitative-genetic variation in several traits within a quaking aspen (Populus tremuloides Michx.) population. A common garden experiment was...
Resource Type:: Article
Full Text:: , Ronald J. Ryel, Karen E. Mock, and Michael E. Pfrender Abstract: Genetic diversity within populations is

Cesium radioisotope content of wild edible fungi, mineral soil, and surface litter in western North America after the Fukushima nuclear accident

Creator:: Trappe, Matthew J., Minc, Leah D., Kittredge, Kimberly S., and Pink, Jeremias W.
Abstract:: We measured activity levels of cesium radioisotopes ¹³⁴Cs and ¹³⁷Cs in wild edible fungi, mineral soil, and surface litter of the west coast of North America from southern California to northern Vancouver Island after the Fukushima nuclear accident. All activity measurements were below governmental limits for human health. ¹³⁷Cs activity...
Resource Type:: Article
Full Text:: 38 The purpose of this study was to measure and report the levels of cesium radionuclides in wild

Pathogens and insects in a pristine forest ecosystem: the Sierra San Pedro Martir, Baja, Mexico

Creator:: Maloney, Patricia E. and Rizzo, David M.
Abstract:: We determined the incidence of pathogens and insects across mixed-conifer stands in the Sierra San Pedro Martir (SSPM) of northern Baja, Mexico, to assess the role of pests in a pristine forest ecosystem. We also determined the spatial distribution of the two most common pests, mistletoe, Phoradendron pauciflorum Torrey, and...
Resource Type:: Article
Full Text:: and no official endorsement should be inferred. 2Corresponding author (e-mail: tbntm@telis.org). I

The CP4 transgene provides high levels of tolerance to Roundup® herbicide in field-grown hybrid poplars

Creator:: Meilan, R., Han, K.-H., Ma, C., DiFazio, Stephen P., Eaton, J. A., Hoien, E. A., Stanton, B. J., Crockett, R. P., Taylor, M. L., James, R. R., Skinner, J. S., Jouanin, L., Pilate, G., and Strauss, S. H.
Abstract:: We tested two genes together in hybrid poplars (genus Populus), CP4 and GOX, for imparting tolerance to glyphosate (the active ingredient in Roundup® herbicide). Using Agrobacterium-based transformation, 80 independent transgenic lines (i.e., products of asexual gene transfer) were produced in a variety of hybrid poplar clones (40 lines in Populus...
Resource Type:: Article
Full Text:: western Oregon. Ten percent of our transgenic lines showed no foliar damage or reduced growth after being

Rootstock effects on scion growth and reproduction in 8-year-old grafted loblolly pine

Creator:: Jayawickrama, K. J. S., McKeand, S. E., and Jett, J. B.
Abstract:: Contributions of sites, rootstocks, and scion clones (and the nteractions between these factors) to scion growth and reproduction were studied in loblolly pine (Pinus taeda L.). Twenty-five full-sib families were used as rootstocks. Six scion clones were grafted on them in all combinations. Study sites were three seed orchards in...
Resource Type:: Article
Full Text:: clones and no effects at all in two clones. For all traits the largest variance component was for either

Bacterio-opsin gene overexpression fails to elevate fungal disease resistance in transgenic poplar (Populus)

Creator:: Mohamed, Rozi, Meilan, Richard, Ostry, Michael E., Michler, Charles H., and Strauss, Steven H.
Abstract:: Overexpression of the bacterio-opsin (bO) gene in tobacco had previously been shown to induce hypersensitiveresponse- like lesions, increase viral and bacterial disease resistance, and stimulate pathogenesis-related gene expression. To see if this gene enhanced resistance to fungal pathogens of poplar, we generated a total of 35 transgenic lines in two...
Resource Type:: Article
Full Text:: disease resistance in transgenic poplar (Populus) Rozi Mohamed, Richard Meilan, Michael E. Ostry, Charles

Modeling the incidence and severity of hemlock dwarf mistletoe in 110-year-old wind-disturbed forests in Southeast Alaska

Creator:: Trummer, L. M., Hennon, P. E., Hansen, E. M., and Muir, P. S.
Abstract:: A model was developed to predict the severity of dwarf mistletoe (Arceuthobium tsugense (Rosendahl) G.N. Jones) in western hemlock trees (Tsuga heterophylla (Raf.) Sarg.) that developed within forests of Southeast Alaska that experienced near-catastrophic windthrow in the late 1800s. The model suggests that the degree of dwarf mistletoe severity on...
Resource Type:: Article
Full Text:: small residual trees that survived the wind disturbance. No significant relationships were found between

Nutrient stores and dynamics of woody detritus in a boreal forest: modeling potential implications at the stand level

Creator:: Krankina, Olga N., Harmon, Mark E., and Griazkin, Anatolii V.
Abstract:: Concentrations of 14 chemical elements (Al, B, C, Ca, Cu, Fe, K, N, Mg, Mn, Na, P, S, Zn) were measured in wood and bark of 126 sample trees representing different stages of decomposition in three major tree species of northwestern Russia: Scots pine (Pinus sylvestris L.), Norway spruce (Picea...
Resource Type:: Article
Full Text:: : modeling potential implications at the stand level Olga N. Krankina, Mark E. Harmon, and Anatolii V

Methods for evaluating crown area profiles of forest stands

Creator:: Dubrasich, Michael E., Hann, David W., and Tappeiner, John C., II
Abstract:: Canopy architectures of five structurally complex forest stands and three structurally simple forest stands in southwest Oregon and the Willamette Valley, Oregon, were evaluated and quantified through crown area profiles. Mixed conifer and mixed conifer-hardwood stands across a range of sites were sampled for crown widths and heights. Crown width...
Resource Type:: Article
Full Text:: Methods for evaluating crown area profiles of forest stands1 Michael E

A chronosequence of wood decomposition in the boreal forests of Russia

Creator:: Yatskov, Mikhail, Harmon, Mark E., and Krankina, Olga N.
Abstract:: Coarse woody debris (CWD), represented by logs and snags >10 cm in diameter and >1 m in length, was sampled at eight sites in Russian boreal forests to determine the specific density of decay classes and decomposition rates. Tree species sampled included Abies siberica Ledeb., Betula pendula Roth., Betula costata...
Resource Type:: Article
Full Text:: m as s, k is th e de co m po si tio n ra te co ns ta nt w he n Y 0 is no t fo rc ed

ScholarsArchive@OSU

Quantitative-genetic variation in morphological and physiological traits within a quaking aspen (Populus tremuloides) population

Cesium radioisotope content of wild edible fungi, mineral soil, and surface litter in western North America after the Fukushima nuclear accident

Pathogens and insects in a pristine forest ecosystem: the Sierra San Pedro Martir, Baja, Mexico

The CP4 transgene provides high levels of tolerance to Roundup® herbicide in field-grown hybrid poplars

Rootstock effects on scion growth and reproduction in 8-year-old grafted loblolly pine

Bacterio-opsin gene overexpression fails to elevate fungal disease resistance in transgenic poplar (Populus)

Modeling the incidence and severity of hemlock dwarf mistletoe in 110-year-old wind-disturbed forests in Southeast Alaska

Nutrient stores and dynamics of woody detritus in a boreal forest: modeling potential implications at the stand level

Methods for evaluating crown area profiles of forest stands

A chronosequence of wood decomposition in the boreal forests of Russia

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