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Addressing the relationship between Pseudoperonospora cubensis and P. humuli using phylogenetic analyses and host specificity assays

Creator:: Mitchell, Melanie N.
Abstract:: The two most economically important plant pathogens in the Pseudoperonospora (Peronosporaceae) genus are P. cubensis, causal agent of cucurbit downy mildew, and P. humuli, causal agent of hop downy mildew. These organisms have been shown to be very closely related phylogenetically and morphologically. In 2005, researchers in Korea proposed that...
Resource Type:: Masters Thesis
Full Text:: ) sequence data, P. humuli should be reduced taxonomically to a synonym of P. cubensis. As this taxonomic

The role of Verticillium albo-atrum Reinke and Berth in seed transmission and induction of a latent disease of Pelargonium

Creator:: Koocheki, Hormozdyar Khodadad
Abstract:: Many initially healthy Pelargonium seedlings developed symptoms of Verticillium wilt in an Oregon State University greenhouse when they attained blooming age. The symptoms first appeared in May as "edge burning," yellowing, and wilting of leaves. In late summer, these seedlings which were the offspring of Verticillium infected plants, became severely...
Resource Type:: Masters Thesis
Full Text:: a learned and under- standing director, Dr. Roy A. Young. The writer wishes to thank Dr. Frank P

The association of epiphytic macrolichens and bryophytes with riparian stand types along a valley continuum, Oregon Coast Range

Creator:: Ruchty, Andrea M.
Abstract:: I surveyed epiphytic macrolichens and bryophytes in six stands in each of seven riparian stand types in the Oregon Coast Range. This study (Chapter 2) describes the association of epiphytes with stand types and the corresponding potential of forest canopy conversions to affect epiphyte communities. Species composition, diversity, and representation...
Resource Type:: Masters Thesis
Full Text:: . MRPP produces a test statistic (T), chancecorrected within- group agreement (A) and a p-value, where p

Identification of Genetic Variation between Obligate Plant Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Creator:: Summers, Carly F., Gulliford, Colwyn M., Carlson, Craig H., Lillis, Jacquelyn A., Carlson, Maryn O., Cadle-Davidson, Lance, Gent, David H., and Smart, Christine D.
Abstract:: RNA sequencing (RNA-seq) and genotyping-by-sequencing (GBS) were used for single nucleotide polymorphism (SNP) identification from two economically important obligate plant pathogens, Pseudoperonospora cubensis and P. humuli. Twenty isolates of P. cubensis and 19 isolates of P. humuli were genotyped using RNA-seq and GBS. Principle components analysis (PCA) of each data...
Resource Type:: Article
Full Text:: that P. cubensis isolates from squash are genetically distinct from cucumber and cantaloupe isolates. A

Lichen response to the environment and forest structure in the western Cascades of Oregon

Creator:: Martin, Erin P.
Abstract:: Lichens are an important part of the biota in western Oregon forests, where they perform valuable ecological roles and contribute significantly to biodiversity. Lichens in western Oregon are threatened by a number of factors including air pollution and land use practices. If we wish to maintain the persistence of lichens...
Resource Type:: Dissertation
Full Text:: Western Cascades of Oregon by Erin P. Martin A DISSERTATION submitted to Oregon State University in

Molecular characterization of a protein toxin involved in the Pyrenophora tritici-repentis/wheat interaction

Creator:: Tuori, Robert P.
Resource Type:: Dissertation
Full Text:: . °Copyright by Robert P. Tuori April 2, 1998 All Rights Reserved Molecular Characterization of a

Effect of resident epiphytic fungi development of brown rot blossom blight of stone fruits

Creator:: Wittig, Hans P. P.
Abstract:: Antagonistic effects of Epicoccum purpurascens, Aureobasidium pullulans, Trichoderma spp., and Botrytis cinerea on establishment of Monilinia fructicola infections in cherry and peach blossoms were assessed in field and mist chamber studies. Conidia of each fungus were applied to blossoms that were subsequently inoculated with conidia of M fructicola. Mist chamber...
Resource Type:: Masters Thesis
Full Text:: fungi were recovered at a significantly (P=.05) higher percentage on green cherries where they had

Analysis and prediction of patterns in lichen communities over the western Oregon landscape

Creator:: Peterson, Eric B.
Abstract:: The diverse lichen flora of the Pacific Northwest is being impacted by population growth and by forest management practices. Accumulating information about our lichen flora will improve our conservation strategies. This dissertation first collects information to improve our understanding of how lichen communities vary among forests of differing structure, and...
Resource Type:: Dissertation
Full Text:: 11 M fuliginosa (Fr. ex Duby) Essi. MELFUL P 8 12 M multispora (A. Schneider) Essi. MELMUL P 0 2 U M

An investigation of vegetation : hydrology interactions in watershed 1 at the H.J. Andrews Experimental Forest

Creator:: Bredensteiner, Kim C.
Abstract:: For management purposes, it would be useful to be able to predict streamflow response to forest practices in small, unmonitored basins. The primary objective of this study is to investigate the influence of early successional vegetation on summer streamflow levels. The long-term data records from watershed 1 at the H.J....
Resource Type:: Masters Thesis
Full Text:: Abstract Approved: Ronald P. Neilson For management purposes, it would be useful to be able to predict

Studies on the bacterial gummosis of stone fruits

Creator:: Van Gundia, Gordon Keller
Resource Type:: Masters Thesis
Full Text:: ) U) Q) - Culture .-i a) Q P Q) i r-4 () $ U) to 'Q - 138 + rrl r-4 t) O I-4 r1

ScholarsArchive@OSU

Addressing the relationship between Pseudoperonospora cubensis and P. humuli using phylogenetic analyses and host specificity assays

The role of Verticillium albo-atrum Reinke and Berth in seed transmission and induction of a latent disease of Pelargonium

The association of epiphytic macrolichens and bryophytes with riparian stand types along a valley continuum, Oregon Coast Range

Identification of Genetic Variation between Obligate Plant Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Lichen response to the environment and forest structure in the western Cascades of Oregon

Molecular characterization of a protein toxin involved in the Pyrenophora tritici-repentis/wheat interaction

Effect of resident epiphytic fungi development of brown rot blossom blight of stone fruits

Analysis and prediction of patterns in lichen communities over the western Oregon landscape

An investigation of vegetation : hydrology interactions in watershed 1 at the H.J. Andrews Experimental Forest

Studies on the bacterial gummosis of stone fruits

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