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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:: approved: T. C. Allen, Jr. Cultivated lilies include many garden varieties in addition to the Easter

Development of in vitro lily scale budlets as related to virus elimination

Creator:: Ruttum, Joanne C.
Abstract:: Lily hybrids vary in their ability to produce virus-free (VF) bulblets when grown from virus-infected scales in tissue culture. Asiatic hybrids typically produce a higher percentage of in vitro VF scale bulblets than do Lilium longiflorum cultivars. Three hypotheses concerning the cause of this variation are tested on five lily...
Resource Type:: Masters Thesis
Full Text:: virus elimination AN ABSTRACT OF THE THESIS OF Joanne C. Ruttum for the degree of Master of Science

Differential Effects of First Year Wheat Genotype on the Suppression of Take-All Disease and the Establishment of Suppressive Microbial Agents in the Rhizosphere

Creator:: Perkins, Evan M.
Abstract:: Recent research in the UK has found that the wheat cultivar grown in the first year can have a significant impact on the amount of take-all that develops in the second year, regardless of the cultivar planted in year two. ‘Einstein’ is one such cultivar that reduces take-all disease (reduced...
Resource Type:: Masters Thesis
Full Text:: approved: ____________________________________________________ Christopher C. Mundt Recent

The distribution of planktonic diatoms in Yaquina Estuary, Oregon

Creator:: Karentz, Deneb
Resource Type:: Masters Thesis
Full Text:: £0 r the d eg r e e of _.::.:M:.:;;A:.=S;..:T;..:E=.;R::.:..-O.:::..=.F-..::::S:...::C::...,:I=E:;,:N

Potato virus X : detection and inter-relationship with Verticillium dahliae and Colletotrichum atramentarium

Creator:: Goodell, Jody Jellison
Abstract:: Preliminary studies were run to determine the sensitivity and reliability of enzyme-linked immunosorbent assay (ELISA) for the detection of potato virus X (PVX). ELISA was found to be capable of detecting PVX in tobacco at a 1:3333 sample dilution. The reliability of ELISA for the detection of PVX in potato...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Redacted for privacy Thomas C. Allen Preliminary studies were run to determine the

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

Creator:: Brazil, Jessie A.
Abstract:: Bacterial soft rot of potato (Solanum tuberosum), caused by Pectobacterium and Dickeya species, is among the most common and destructive potato diseases in the United States. These pathogens cause a variety of vascular wilts, and in potato cause a disease complex that includes tuber soft rot, blackleg, aerial stem rot,...
Resource Type:: Masters Thesis
Full Text:: economic and geographic survey. Potato Research, 42, 241–264. Winslow, C. E., Broadhurst, J., Buchanan

A Putative PAMP-Induced Peptide Family Member is Associated with Symptom Severity to the Necrotic Strain NTN of Potato Virus Y in Potato

Creator:: Combest, Max M.
Abstract:: Potato Virus Y (PVY) is an enduring problem for potato production worldwide. Potato varieties that resist the “ordinary” strain PVYO were developed by breeders, but in recent years, recombinant strains of PVY have been able to circumvent this strain-specific resistance and evade growers and seed certification officials by causing fewer...
Resource Type:: Masters Thesis
Full Text:: .................................................................................. 76 7. PVY testing by RT-PCR of leaves from in-season infected plants (A-C) and seedborne

Water deficit stress effects on bacterial ring rot of potato caused by Clavibacter michiganensis subsp. sepedonicus

Creator:: Crabtree, Kristine L.
Abstract:: 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 treatments, and inoculum densities of 0 or 2 X 10⁷ cfu C. m. sepedonicus/seed piece were arranged factorially. Stem...
Resource Type:: Masters Thesis
Full Text:: of 0 or 2 X 107 cfu C. m. sepedonicus/seed piece were arranged factorially. Stem populations of C

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Creator:: Angwin, Peter A.
Abstract:: Studies to identify the environmental factors that influence the rate of ectotrophic mycelial growth of Phellinus weirii (Murr.) Gilbertson along Douglas-fir roots were undertaken both in the laboratory and in the field. The effects of soil pH, nitrogen, moisture, temperature, microorganisms and bulk density were investigated. In the lab, the...
Resource Type:: Masters Thesis
Full Text:: of P. weirii was greatest at 15% soil water content. Maximum growth occurred at 20-25 C. Field

Transposon-induced nutritional and virulence mutants in two pathovars of Pseudomonas syringae

Creator:: Anderson, Dirk M.
Resource Type:: Masters Thesis
Full Text:: target DNA; (B) one DNA strand at each end of the transposon is joined to the cleaved target DNA. (C) The

ScholarsArchive@OSU

Some cytological aspects of streak mottle virus in Lilium speciosum Thunberg

Development of in vitro lily scale budlets as related to virus elimination

Differential Effects of First Year Wheat Genotype on the Suppression of Take-All Disease and the Establishment of Suppressive Microbial Agents in the Rhizosphere

The distribution of planktonic diatoms in Yaquina Estuary, Oregon

Potato virus X : detection and inter-relationship with Verticillium dahliae and Colletotrichum atramentarium

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

A Putative PAMP-Induced Peptide Family Member is Associated with Symptom Severity to the Necrotic Strain NTN of Potato Virus Y in Potato

Water deficit stress effects on bacterial ring rot of potato caused by Clavibacter michiganensis subsp. sepedonicus

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Transposon-induced nutritional and virulence mutants in two pathovars of Pseudomonas syringae

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