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The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

Creator:: Graham, James Herbert
Abstract:: The ectomycorrhizal fungi Cenococcum geophilum, Hebeloma crustuliniforme and Laccaria laccata produced ethylene in vitro in modified Melin-Norkrans liquid medium only if amended with 2.5 to 10 mM methionine; Pisolithus tinctorius failed to produce ethylene unless the cultures were renewed with fresh methionine-amended medium prior to ethylene assay. An additional 19...
Resource Type:: Dissertation
Full Text:: Fusarium Infection of Douglas-Fir Roots AN ABSTRACT OF THE THESIS OF James Herbert Graham, Jr. for the

Phylogeography and Evolution of Effector Genes in Phytophthora Species

Creator:: Shakya, Shankar K.
Abstract:: Plant pathogens in the genus Phytophthora are known to cause disease on field crops, nursery plants, and forest trees. The best known example probably is Phytophthora infestans, which triggered the infamous Irish potato famine. Other important Phytophthora species include: P. ramorum (sudden oak death pathogen), P. sojae (soybean root rot...
Resource Type:: Dissertation

A systematic study of Lathyrus vestitus Nutt. ex T. & G. (Fabaceae) and allied species of the Pacific Coast

Creator:: Broich, Steven L.
Abstract:: Eight species of Lathvrus (Fabaceae, Faboideae) endemic to the Pacific Coast of North America were the subject of a systematic investigation. Taxa studied included Lathvrus vestitus, Nutt. ex T. & G., L. laetif lorus Greene, L.. iepsonii Greene, £,. splendens Kellogg, L. polvphvllus, Nutt. ex T. & G., L. holochlorus...
Resource Type:: Dissertation
Full Text:: ArVydas Grybauskas. Mary Allcott, W. Roderick and especially James R. Griffin graciously responded to

Response of potato cultivars to moisture deficit stress and Verticillium dahliae

Creator:: Arbogast, Meghan Canfield
Resource Type:: Masters Thesis
Full Text:: sensitive a moderately tolerant a susceptible a susceptible a a Mosley and Chase, 1993 b James

Fire and Grazing Influence Site Resistance to Bromus tectorum Through Their Effects on Shrub, Bunchgrass and Biocrust Communities in the Great Basin (USA)

Creator:: Condon, Lea A. and Pyke, David A.
Abstract:: Shrubs, bunchgrasses and biological soil crusts (biocrusts) are believed to contribute to site resistance to plant invasions in the presence of cattle grazing. Although fire is a concomitant disturbance with grazing, little is known regarding their combined impacts on invasion resistance. We are the first to date to test the...
Resource Type:: Article
Full Text:: textures are associated with increased cover of B. tectorum (Stewart and Hull 1949)1 SPP fi ± grass comp

Cryptogam communities in forest and steppe ecosystems of Oregon, USA

Creator:: Root, Heather T.
Abstract:: I focus on addressing knowledge gaps relating to management of cryptogams in Oregon's public lands in Pseudotsuga menziesii-Tsuga heterophylla forests on the west side of the Cascade Range and dryland steppe in the Cascade Range's rainshadow. While a great deal of research has illustrated the importance of late-successional forests for...
Resource Type:: Dissertation
Full Text:: Rosentreter, Kerry Knudsen, James Lendemer, Toby Spribille, Einar Timdal and Othmar Breuss have provided

Seed and seedling ecology of Artemisia tridentata in a restoration context

Creator:: Wijayratne, Upekala C.
Abstract:: The semi-arid sagebrush steppe ecosystem is one of the largest biomes in North America. The steppe provides critical habitat and forage for wildlife and is economically important to recreation and livestock industries. However, the ecosystem is threatened primarily due to several negative effects associated with expansion of the exotic annual...
Resource Type:: Dissertation
Full Text:: winter are larger and more productive (Stewart and Hull 1949, Mack and Pyke 1984), which allows B

An analysis of montane forest vegetation on the east flank of the central Oregon Cascades

Creator:: West, Neil E.
Abstract:: Montane forest vegetation as it occurs on the east flank of the central Oregon Cascades has provided excellent conditions for a "natural experiment" in the use of various methodologies in studying vegetational distribution. This "experiment" has reflected on some theory and practice for the discipline of plant synecology. Detailed descriptions,...
Resource Type:: Dissertation
Full Text:: - trary units for discussion purposes. (c. f. Whittaker, 146; Swedberg, 112; and Thilenius, 115). The

Succession and certain adaptive features of plants native to the sand dunes of the Oregon coast

Creator:: Kumler, Marion Lawrence, 1941-
Abstract:: The vegetation of the Oregon coast is characterized by a variety of stages of plant succession which are repeated widely throughout the sand dune area. During the years from 1960 to 1963 the gradation of upland sand dune succession was studied on 48 plots within a 150 mile section of...
Resource Type:: Dissertation

ScholarsArchive@OSU

The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

Phylogeography and Evolution of Effector Genes in Phytophthora Species

A systematic study of Lathyrus vestitus Nutt. ex T. & G. (Fabaceae) and allied species of the Pacific Coast

Response of potato cultivars to moisture deficit stress and Verticillium dahliae

Fire and Grazing Influence Site Resistance to Bromus tectorum Through Their Effects on Shrub, Bunchgrass and Biocrust Communities in the Great Basin (USA)

Cryptogam communities in forest and steppe ecosystems of Oregon, USA

Seed and seedling ecology of Artemisia tridentata in a restoration context

An analysis of montane forest vegetation on the east flank of the central Oregon Cascades

Succession and certain adaptive features of plants native to the sand dunes of the Oregon coast

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