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Some cytological aspects of streak mottle virus in Lilium speciosum Thunberg

Creator:: Elser, John Elmore
Abstract:: Cultivated lilies include many garden varieties in addition to the Easter lily, Lilium longiflorum Thunb. A popular member of the garden group is Lilium speciosum Thunb., whose leaves can be discolored by a virus symptom described as streak mottle. This disorder is characterized by dashes of chlorotic tissue interspersed with...
Resource Type:: Masters Thesis
Full Text:: by ultrathin tissue sectioning for the electron microscope. Virology 7: 193 -219. Shalla, T. A

Ozone flux in Helianthus annuus (L.)

Creator:: Smith, Elaine D.
Abstract:: Sunflower (Helianthus annuus L., cv. NK894) seedlings, grown hydroponically, were exposed to ozone concentrations of 0.0, 0.1, 0.2, and 0.3 ppm at 60% RH, or 0.0 and 0.3 ppm at 30% and 90% RH, for 6 h/d, for four consecutive days, at ages 15 to 18 days from seeding. Plant...
Resource Type:: Masters Thesis
Full Text:: Privacy David T. T44kei Sunflower (Helianthus annuus L., cv. NK894) seed- lings, grown hydroponically

The growth of wild-type and genetically-marked strains of Tilletia caries and T. controversa in susceptible and resistant wheat cultivars

Creator:: Trail, Frances
Abstract:: The objective of this study was to provide basic information on the interaction of the bunt fungi Tilletia caries and T. controversa with their host, Triticum aestivum. Studies on the ability of haploid strains to colonize wheat heads provided the basis for experiments in which haploid strains were crossed in...
Resource Type:: Masters Thesis
Full Text:: . controversa and hybrids formed by the cross of T. caries, and a genetically-marked strain of T. controversa

Examination of necrotic fleck-diseased Lilium longiflorum

Creator:: Lyons, Alan Robert
Resource Type:: Masters Thesis
Full Text:: Inhibition of Transmission Dr. R. 0. Hampton, U. S. D. A. and Dr. T. C. Allen, both of Oregon State

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

Creator:: Wright, Carolyn E.
Abstract:: Astragalus diaphanus is a rare plant endemic to the John Day River drainage of north-central Oregon. This species has several interesting features, including the dimorphism of its fruit and its geographical isolation from the two nearest taxonomically related species, which occur in Colorado. This study addressed the species' distribution and...
Resource Type:: Masters Thesis
Full Text:: A systematic and ecological study of Astragalus diaphanus

Systematics of the genus Otidea in the Pacific Northwest

Creator:: Peterson, Eric T.
Abstract:: The fungal ascomycete genus Otidea as represented in the Pacific Northwest of North America includes eight well known species and two poorly-known species. Cladistic analysis utilizing characters from ribosomal DNA and morphology allowed the development of a robust phylogenetic species concept for Otidea. The combination of characters from the ribosomal...
Resource Type:: Masters Thesis
Full Text:: Eric T. Peterson A THESIS submitted to Oregon State University in partial fulfillment of the

Grazer-periphyton interactions in laboratory streams

Creator:: Sumner, William T.
Resource Type:: Masters Thesis
Full Text:: six laboratory streams over a period of 80 days. Oxytrema silicula, an herbi- vorous snail common to

Development of Quantitative PCR Assays to Aid in Root-knot Nematode (Meloidogyne spp.) Diagnostics and Resistance Breeding Efforts in the Pacific Northwest

Creator:: Soule, Michelle L.
Abstract:: In the Pacific Northwest (PNW), the two most common root-knot nematodes are Meloidogyne hapla and Meloidogyne chitwoodi. These nematodes can infect a wide variety of crops and can cause significant losses. Currently, it is common for the field of nematology to use labor-intensive microscopy to identify plant-parasitic nematodes based on...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ Inga A. Zasada In the Pacific Northwest (PNW), the two most common root-knot nematodes

Yield responses of invasive grasses to carbon doses

Creator:: Brunson, Jessi L.
Abstract:: The sagebrush steppe ecosystem of the northern Great Basin is severely degraded and continues to decline due in large part to the invasive, non-native annual grasses Bromus tectorum L. (cheatgrass) and Taeniatherum caput-medusae (L.) Nevski (medusahead). Restoration of invasive-dominated areas is difficult, but can be enhanced by adding a carbon...
Resource Type:: Masters Thesis
Full Text:: : David A. Pyke Patricia S. Muir The sagebrush steppe ecosystem of the northern Great Basin is

Development and control of benomyl-tolerant Botrytis cinerea strains on snap beans (Phaseolus vulgaris)

Creator:: Johnson, Earl Ray
Abstract:: Benomyl-tolerant Botrytis cinerea was found in snap bean fields throughout the Willamette Valley while no tolerant isolates of Whetzelinia sclerotiorum were detected. Thirty-five benomyl-tolerant isolates of B. cinerea had slower radial growth rates than eighteen benomyl-sensitive isolates. Sporulation of an aggressive tolerant isolate was not stimulated when grown on benomyl-treated...
Resource Type:: Masters Thesis
Full Text:: was inoculated with the 50:50 (T/S) mixture and the other set with a 5:95 (T/S) mixture. The 5:95 (T

ScholarsArchive@OSU

Some cytological aspects of streak mottle virus in Lilium speciosum Thunberg

Ozone flux in Helianthus annuus (L.)

The growth of wild-type and genetically-marked strains of Tilletia caries and T. controversa in susceptible and resistant wheat cultivars

Examination of necrotic fleck-diseased Lilium longiflorum

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

Systematics of the genus Otidea in the Pacific Northwest

Grazer-periphyton interactions in laboratory streams

Development of Quantitative PCR Assays to Aid in Root-knot Nematode (Meloidogyne spp.) Diagnostics and Resistance Breeding Efforts in the Pacific Northwest

Yield responses of invasive grasses to carbon doses

Development and control of benomyl-tolerant Botrytis cinerea strains on snap beans (Phaseolus vulgaris)

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