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Browsing Theses and Dissertations (Botany and Plant Pathology) by Title

Browsing Theses and Dissertations (Botany and Plant Pathology) by Title

Now showing items 189-198 of 198

Understory herb and shrub responses to root trenching, pre-commercial thinning, and canopy closure in Douglas-fir forest of the western Cascades, Oregon

Lindh, Briana C. (2003-05-23)

This thesis examines factors limiting understory herb presence and flowering in young second-growth Douglas-fir (Pseudotsuga menziesii) forests on the west side of the Cascade Mountains, Oregon, USA. I studied the belo ...
Using local climate to explain temporal variation in rare plant populations

Pfingsten, Ian A. (2012-08-28)

Increased temperatures due to anthropogenic-induced climate change may raise the threat of extinction for taxa with sessile life histories (e.g., plants) in the near future. Linking climate change models to demographic m ...
Variation in plant response to inoculation with different isolates of vesicular arbuscular mycorrhizal fungi

Ianson, David C. (1990-12-21)
Variation of drought resistance and root regeneration among genotypes of Port-Orford-cedar (Chamaecyparis lawsoniana)

Sharpe, Jodie M. (2002-10-18)

Drought resistance among genotypes of Port-Orford-cedar (Chamaecyparis lawsoniana (A. Murr.) Pan., Cupressaceae) seedlings was evaluated both in the field and in the greenhouse. Field water potentials (Ψ) of 5-year-old ...
Vascular and nonvascular vegetation of the Caldera of Mt. Aniakchak, Alaska

Hasselbach, Linda M. (1995-01-24)
Vegetation and fire history of a Ponderosa pine-white fir forest in Crater Lake National Park

McNeil, Robert Curlan (1975-07-14)
Vegetative ecology of a montane mire, Crater Lake National Park, Oregon

Seyer, Susan C. (1979-12-14)
Vegetative ecology of Hunts Cove, Mt. Jefferson, Oregon

Campbell, Alcetta Gilbert (1973-02-22)

The vegetative communities in the subalpine meadows of Hunts Cove, Mt. Jefferson, and some of the major environmental factors affecting them were studied in the summer of 1971. Hunts Cove is in the subalpine Tsuga mer ...
Viability and infective potential of Phytophthora pini zoospores in a recirculating irrigation system

Shay, Sarah D. (2012-08-31)

Phytophthora pini Leonian, recently re-established from P. citricola I, is a pathogen with a wide range of forest and nursery hosts. It causes foliar infections in horticultural nurseries in Oregon, where recirculating ...
Water deficit stress effects on bacterial ring rot of potato caused by Clavibacter michiganensis subsp. sepedonicus

Crabtree, Kristine L. (1994-05-31)

Population size of Clavibacter michiganensis subsp. sepedonicus in potato cv Russet Burbank and plant response as affected by drought were assessed in a greenhouse experiment. Water deficit stress and no stress treatm ...