Index Catalog // ScholarsArchive@OSU

¹³C-CP MAS NMR study of decomposition of five coniferous woody roots from Oregon

Creator:: Hawkins, Robert E.
Abstract:: Using ¹³C cross polarization magic angle spinning nuclear magnetic resonance techniques on 5 species of dead trees from the northwest (western hemlock, Douglas fir, Sitka spruce, lodgepole pine and ponderosa pine) I tracked the lignin and cellulose content over a 22 to 36 year period in order to determine the...
Resource Type:: Masters Thesis
Full Text:: Five Coniferous Woody Roots From Oregon. Abstract approved William W. Warren Using '3C cross

Mediation of conifer root growth by mycorrhizal fungi and plant growth regulators

Creator:: Scagel, Carolyn F.
Abstract:: Many mycorrhizosphere microorganisms can produce plant growth regulating compounds in vitro. Plant growth regulating compounds are known to mediate root growth and development. In reforestation practices, conifer tree seedling growth and survival are linked to rapid root growth and development after outplanting. Multifactorial experiments were conducted to document variations in...
Resource Type:: Dissertation
Full Text:: Mediation of conifer root growth by mycorrhizal fungi and

Fungal diversity within decomposing woody conifer roots in Oregon

Creator:: Vandegrift, V. Eleanor
Abstract:: Previous studies have indicated that roots from five tree species (Picea sitchensis, Tsuga heterophylla, Pseudotsuga menziesii, Pinus ponderosa, and Pinus contorta) decompose at different rates across an environmental gradient in Oregon. Measurements of wood chemistry from each tree species as well as moisture and temperature from each location do not...
Resource Type:: Masters Thesis
Full Text:: within Decomposing Woody Conifer Roots in Oregon. I Abstract approved: _t.._S_,,i9'-n.L.,,a

Impact of Armillaria and annosus root diseases on stand and canopy structure, species diversity, and down woody material in a central Oregon mixed-conifer forest

Creator:: Fields, Kristen L. N.
Abstract:: White and grand fir are both valuable components of the mixed-conifer stand structure managed for late-successional reserves in central Oregon. However, they are often short-lived species because of high susceptibility to root diseases, defoliating insects, bark beetles, and wildfire. This study focuses on the effects of root diseases caused by...
Resource Type:: Masters Thesis
Full Text:: a Central Oregon Mixed-Conifer Forest Abstract approved: Gregory M. Filip White and grand fir are

Root decomposition in three coniferous forests : effects of substrate quality, temperature, and moisture

Creator:: Chen, Hua
Abstract:: Controls of substrate quality, temperature, and moisture on woody root decomposition in the Pacific Northwest were explored using chronosequences, time series, laboratory incubations, and simulation modeling approaches at three sites: Cascade Head (CAH), H. J. Andrews (HJA), and Pringle Falls Experimental Forests (PRF). In the chronosequence study, a structural component-oriented...
Resource Type:: Dissertation

Dry coniferous forests in the Western Oregon Cascades

Creator:: Means, Joseph E.
Abstract:: Pseudotsuga menziesii dominates the forests of the Pacific Northwest. But though it is dominat, Tsuaa heteroohylla or Abies amabilis is usually climax. Many researchers have studied Pseudotsuga on the widespread mesic sites where it is seral, but few have examined the relatively rare ecosystems in which Pseudotsuga or its associate...
Resource Type:: Dissertation
Full Text:: Dry coniferous forests in the Western Oregon Cascades

RFLP analysis of genetic variation in the laminated-root-rot fungal pathogen of conifers, Phellinus weirii

Creator:: Bae, Hanhong
Abstract:: DNA markers that detect polymorphisms within and between two biological species of the coniferous laminated-root-rot fungus Phellinus weirii were developed and used to measure the amount and distribution of genetic variation. In a preliminary survey, total cellular DNA from 3 Douglas-fir-type isolates and 3 cedar-type isolates was digested with 12...
Resource Type:: Masters Thesis

Meta-sedimentary bedrock as an alternative source of water for forest ecosystems in a Mediterranean climate

Creator:: Zwieniecki, Maciej A.
Abstract:: Evaluation of meta-sedimentary bedrock as a source of stored water available to plants in a mediterranean climate is presented based on: root length distribution (RLD), root morphology, rock water holding capacity and seasonal pattern of water depletion. Studies were performed in southwestern Oregon under young stands of whiteleaf manzanita, ponderosa...
Resource Type:: Dissertation

Below ground biology of Botrychium pumicola (Ophioglossaceae)

Creator:: Camacho, Francisco J.
Resource Type:: Dissertation
Full Text:: rare fern, with extant populations in Klamath, Lake and Deschutes counties, ofcentral Oregon. It

Forecasting Pseudocercosporella herpotrichoides foot rot of winter wheat

Creator:: Grybauskas, Arvydas P.
Abstract:: The use of fungicides for the control of foot rot of winter wheat, caused by Pseudocercosporella herpotrichoides (Fron) Dei., requires a forecast of disease risk to optimize this management practice ecologically and economically. Foot rot occurs in both the mild, wet (100+ cm, ppt./year) annual cropped areas in western Oregon,...
Resource Type:: Dissertation
Full Text:: in western Oregon, and the drier (25-50 cm. ppt./year) summer-fallowed areas in eastern Oregon

ScholarsArchive@OSU

¹³C-CP MAS NMR study of decomposition of five coniferous woody roots from Oregon

Mediation of conifer root growth by mycorrhizal fungi and plant growth regulators

Fungal diversity within decomposing woody conifer roots in Oregon

Impact of Armillaria and annosus root diseases on stand and canopy structure, species diversity, and down woody material in a central Oregon mixed-conifer forest

Root decomposition in three coniferous forests : effects of substrate quality, temperature, and moisture

Dry coniferous forests in the Western Oregon Cascades

RFLP analysis of genetic variation in the laminated-root-rot fungal pathogen of conifers, Phellinus weirii

Meta-sedimentary bedrock as an alternative source of water for forest ecosystems in a Mediterranean climate

Below ground biology of Botrychium pumicola (Ophioglossaceae)

Forecasting Pseudocercosporella herpotrichoides foot rot of winter wheat

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