Index Catalog // ScholarsArchive@OSU

Studies on canker in European filbert caused by Anisogramma anomala

Creator:: Postman, Joseph D.
Abstract:: Anisogramma anomala causes a stem canker of filberts, Corylus avellana. This disease became a threat to the main U.S. filbert growing region when it was introduced into the Pacific Northwest around 1968. Various methods of artificially inoculating filbert trees and seeds were explored. Less than 1% of potted filbert trees...
Resource Type:: Masters Thesis
Full Text:: anomala AN ABSTRACT OF THE THESIS OF Joseph D. Postman for the degree of Master of Science in Botany

Studies of the fungal endophyte Acremonium coenophialum in tall fescue

Creator:: Azevedo, Mark D.
Abstract:: Tall fescue is thought to have co-evolved with the fungal endophyte Acremonium coenophialum to form a mutualistic relationship. Endophyte-infected (EI) plants can have increased growth and survival when compared with endophyte-free (EF) plants. Responses to endophyte-infection vary and are host-genotype and fungal-biotype specific. Mechanism(s) by which endophyte-infection confers increased growth...
Resource Type:: Masters Thesis

Distribution of Acremonium coenophialum in developing seedlings and inflorescences of Festuca arundinacea

Creator:: Cook, Kathy L.
Abstract:: Acremonium coenophialum is an endophytic fungus which infects the reproductive and vegetative tissue of tall fescue. Interest in this fungus was sparked by research which linked its presence in tall fescue with reduced weight gains and alkaloid-like poisoning in cattle. Incomplete information was available on the endophyte's life or disease...
Resource Type:: Masters Thesis
Full Text:: . Univ. Georgia, Athens, (Atlanta Mtg.). Bacon, C. W., P. C. Lyons, J. K. Porter, and J. D. Robbins

Double-stranded RNA isolated from grapevine affected by grapevine stem-pitting disease

Creator:: Walter, Michael H.
Abstract:: Nucleic acid extracted from dormant cane phloem of grapevines affected by grapevine stem-pitting disease (SP) formed a high molecular weight (MW) band on 1.0% and 0.8% agarose gels. The band was unique to diseased vines. Other bands appeared from samples of both diseased and virus-free vines, but did not associate...
Resource Type:: Masters Thesis
Full Text:: . Ronald Cameron Nucleic acid extracted from dormant cane phloem of grapevines affected by grapevine stem

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

The detection of ilarvirus (subgroup B) by enzyme-linked immunosorbent assay

Creator:: McMorran, Jeffrey P.
Abstract:: The reliability and sensitivity of enzyme-linked immunosorbent assay (ELISA) in the detection of ilarvirus (isometric labile ringspot virus) subgroup B and prune dwarf virus (PDV) isolates in Prunus and Malus species has been well established. To use this technique in large scale virus indexing programs more information was required on...
Resource Type:: Masters Thesis
Full Text:: Enzyme-linked Immunosorbent Assay Abstract approved: Redacted for Privacy H. Ronald Cameron The

Rhynchosporium orthosporum in orchardgrass, isolation frequency, colonization, variability, and an evaluation of cultivar resistance

Creator:: Fernandez, Jesus Perez
Resource Type:: Dissertation
Full Text:: Ronald E. Welty Studies were undertaken in orchardgrass (Dactylis glomerata) and the plant pathogen

The life history of Anisogramma anomala (Pk.) E. Müller (Diaporthaceae) and its pathological and epidemiological association with Corylus avellana L.

Creator:: Gottwald, Timothy Ross
Abstract:: Eastern Filbert Blight, caused by Anisogramma anomala (Peck) E. Miller, was first discovered in the Pacific Northwest in 1974. Orchard experiments suggest that the fungus completes its life cycle in two years. Infection takes place from mid-January to May, mainly through mite-galled-buds infested with an Eriophyid mite, Phytocoptella avellanae Nal....
Resource Type:: Dissertation
Full Text:: : Redacted for Privacy Dr. H. Ronald Cameron Eastern Filbert Blight, caused by Anisogramma anomala (Peck) E

Brown rot of sweet cherry in western Oregon

Creator:: Gashaira, Bashir
Resource Type:: Dissertation
Full Text:: SWEET CHERRY IN WESTERN OREGON Abstract approved: Redacted for privacy C 1 H. Ronald Cameron Brown rot

Studies on the germination and growth of Anisogramma anomala Peck (Muller) in vitro

Creator:: Lightfoot, Richard (Richard Thomas), 1958-
Abstract:: This study examined the effects of pH, temperature, washing, and post-hydration drying on germination of Anisogramma anomala ascopores. Spores germinate most readily in the temperature range of 5 to 15 degrees C, with an optimal temperature of 10 degrees (1 sd=0.05). Growth was best in the pH range of 5...
Resource Type:: Masters Thesis
Full Text:: 10 degrees C <1 s d =0.05), though spores germinated readily from 5 to 15 degrees C. Washed

The effects of univalent cations on the inductive formation of nitrate reductase

Creator:: Nitsos, Ronald Eugene
Abstract:: An investigation was undertaken to determine whether potassium is indeed necessary for the in vivo synthesis of a specific protein. The effects of univalent cations on the inductive formation of nitrate reductase and on the level of activity of representative non-adaptive enzyme are presented. Cultures of Neurospora crassa were grown...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Ronald Eugene Nitsos for the

The effects of univalent cations on the activity of particulate starch synthetase

Creator:: Nitsos, Ronald Eugene
Resource Type:: Dissertation
Full Text:: particulate starch synthetase AN ABSTRACT OF THE THESIS OF RONALD EUGENE NITSOS for the DOCTOR OF

Origin and distribution of polyploid Achillea (Compositae) in western North America

Creator:: Tyrl, Ronald J.
Abstract:: A cytogeographical study was made of populations of tetraploid (n=18) and hexaploid (n=27) Achillea millefolium (Compositae- Anthemideae) from the Pacific Coast states. There is a complex distributional pattern, involving overlapping ranges, mixed populations, migration of one form into areas occuplied by the other, pentaploid hybrids, and septaploid and octoploid plants....
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF RONALD JAY TYRL for the DOCTOR

Photoinduction of kaurene synthetase, an enzyme of the gibberellin biosynthetic pathway, during de-etiolation of pea seedlings

Creator:: Gomez-Navarrete, Gladys
Abstract:: Previous investigations have shown that the enzymes catalyzing the biosynthesis of the gibberellin-type of hormones from mevalonic acid in plants are compartmentalized in plastids. Moreover, the activity of one of the key enzymes in the biosynthetic sequence, kaurene synthetase, exhibits markedly enhanced activity when a dark-grown pea seedling undergoes de-etiolation...
Resource Type:: Masters Thesis
Full Text:: concerning the preparation of this manuscript. Appreciation is also expressed to Drs. Ronald C. Cool

Risk of Exposure to Eastern Equine Encephalomyelitis Virus Increases with the Density of Northern Cardinals

Creator:: Estep, Laura K., McClure, Christopher J. W., Vander Kelen, Patrick, Burkett-Cadena, Nathan D., Sickerman, Stephen, Hernandez, José, Jinright, Joseph, Hunt, Brenda, Lusk, John, Hoover, Victor, Armstrong, Keith, Stark, Lillian M., Hill, Geoffrey E., and Unnasch, Thomas R.
Abstract:: For a variety of infectious diseases, the richness of the community of potential host species has emerged as an important factor in pathogen transmission, whereby a higher richness of host species is associated with a lowered disease risk. The proposed mechanism driving this pattern is an increased likelihood in species-rich...
Resource Type:: Article
Full Text:: . McClure2, Patrick Vander Kelen3, Nathan D. Burkett-Cadena3, Stephen Sickerman4, José Hernandez4, Joseph

Postemergence herbicides and take-all disease in winter wheat : alterations in the incidence and severity of disease and crop growth

Creator:: Geddens, Ray M.
Abstract:: Eight postemergence herbicides were evaluated to determine their influence on the incidence and severity of take-all disease caused by the fungus Gaeumannomyces graminis var. tritici in winter wheat. Mecoprop ((+)-2-(4-chloro-2-methylphenoxy)propanoic acid), difenzoquat (1,2- dimethyl- 3,5- diphenyl -1H- pyrazolium), dinoseb amine (amine salt of 2-(1-methylpropy1)-4,6-dinitrophenol), and diclofopmethyl (methyl ester of (+)-2-[4-(2,4-dichlorophenoxy)...
Resource Type:: Dissertation
Full Text:: members of my graduate committee, Dr. Neil Christensen, Dr. Robert Linderman, Dr. Ronald Welty, Dr

Ecological thresholds, climate extremes, and tree species' distributions across the Pacific coastal United States

Creator:: Lintz, Heather E.
Abstract:: Species' distributions across the landscape are perhaps the least understood yet most conspicuous features of life on earth. Ecologists have long studied species' distributions; yet, many questions remain about why species occur where they do. Such questions persist largely because species' distributions are complex systems with challenging properties like non-linearity,...
Resource Type:: Dissertation
Full Text:: diagonality (D). We use 48 simulated response surfaces of different shapes to test the efficacy of the

Overexpression of thiamin biosynthesis genes increase leaf and seed thiamin content but not resistance to Xanthomonas oryzae in rice

Creator:: Dong, Wei, Thomas, Nicholas, Ronald, Pamela C., and Goyer, Aymeric
Abstract:: Thiamin diphosphate (ThDP), also known as vitamin B1, serves as an enzymatic cofactor in glucose metabolism, the Krebs cycle, and branched-chain amino acid biosynthesis in all living organisms. Unlike plants and microorganisms, humans are not able to synthesize ThDP de novo and must obtain it from their diet. Staple crops...
Resource Type:: Article
Full Text:: ., Canlas, P. E., Navarre, D. A., and Ronald, P. C. (2005). Overexpression of a rice NPR1 homolog leads to

Some properties of ribonucleotide reductase in Rhizobium species

Creator:: Cowles, Joe Richard, 1941-
Abstract:: Ribonucleotide reductase from Rhizobium meliloti has been partially purified and characterized. The enzymatic reduction of ribonucleotides to deoxyribonucleotides is dependent upon B₁₂ coenzyme and dihydrolipoate. B₁₂ coenzyme was more effective than B₁₂ coenzyme analogues in the reductase reaction. The affinity of the R. meliloti reductase system for B₁₂ coenzyme was...
Resource Type:: Dissertation
Full Text:: ) for the PH. D. (Degree) presented on July 16. 1968 (Date) Title: SOME PROPERTIES OF RIBONUCLEOTIDE

Overwintering of Erysiphe necator and Inoculum Monitoring for Decision Aids

Creator:: Thiessen, Lindsey D.
Abstract:: Grape powdery mildew (Erysiphe necator) causes economic damages to grape worldwide due to the cost of management and injury to berries. Each region where European grapevine (Vitis vinifera) is grown experiences a unique epidemic, and disease prediction models that are based on empirical correlations of weather data to disease fail...
Resource Type:: Dissertation
Full Text:: Lindsey D. Thiessen for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on

Candidate Genes Associated with Blister Rust Resistance in Whitebark Pine (Pinus albicaulis) Revealed through de novo Transcriptome Assembly and Differential Gene Expression Analysis

Creator:: Bair, Zolton J.
Abstract:: Whitebark pine (Pinus albicaulis) is an iconic North American high-elevation tree species currently threatened by climate change, mountain pine beetle, and white pine blister rust (WPBR), a lethal disease caused by the non-native fungal pathogen Cronartium ribicola. In collaboration with the USDA Forest Service Dorena Genetic Resource Center, germplasm was...
Resource Type:: Dissertation

Morphology, ultrastructure and mating of sporidia of a wheat-bunt fungus, Tilletia caries (DC.) Tul.

Creator:: Kollmorgen, James Frederick
Abstract:: The teliospore of Tilletia caries germinates to produce a promycelium with a whorl of primary sporidia at its tip. The time between emergence of the promycelium and the development of primary sporidia averaged 2.3 h. Fusion between compatible sporidia occurred within an additional 3.8 h. Primary sporidia appeared to be...
Resource Type:: Dissertation
Full Text:: . J. Metzger, D. I. Mills, R. L. Powelson and R. S. Quatrano. Grateful appreciation is also due to

A revision of Juncus subgenus genuini (Juncaceae) in the Pacific states

Creator:: Lint, Harold LeRoy
Abstract:: A study was made of the subgenus Genuini of the genus Juncus in the Pacific States, California, Oregon and Washington. Extensive morphological comparisons, geographical distributions, habitat differences and observations of apparent presence or absence of natural hybrids provided the major data sources. Cytological studies were made, but were inconclusive. Eleven...
Resource Type:: Dissertation

Role of GacSA Two-component System and Bacterial Surface Attachment in Pseudomonas syringae Virulence

Creator:: O'Malley, Megan R.
Abstract:: Pseudomonas syringae are plant pathogenic bacteria that cause disease by rapidly multiplying within the aboveground tissues of host plants. Growth of P. syringae within plant host tissues requires the disarmament of host immune defenses that limit microbial growth. To combat host defenses, P. syringae deploys a type III secretion system...
Resource Type:: Dissertation
Full Text:: –350. https://doi.org/10.1007/s10327-015-0605-z 4. Hirano, S. S., and C. D. Upper. 1986. Temporal

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:: onto cucumber cv. Straight 8 (A and C) and hop cv. Pacific Gem (B and D

Fescue taxonomy in the Pacific coast states

Creator:: Wilson, Barbara L.
Abstract:: Accurate taxonomy is essential to preservation and management of native grasses. Four problems in fescue taxonomy were investigated: the identity of the native fescue that dominates western Oregon and Washington prairies, the relationship of native Festuca roemeri to closely related grasses, the status of F. howellii and F. washingtonica, and...
Resource Type:: Dissertation
Full Text:: campestris 159 8.5 Leaf cross sections of Festuca filiformis (A), F. glauca (B-C), F. huonii (D) 160 8.6

Soil moisture depletion trends under five plant species present on the Douglas-fir clear-cuts of Mary's Peak, Oregon

Creator:: Drew, Stephen Ernest
Abstract:: Soil moisture depletion trends under five plant species growing on the clear-cuts of the Marys Peak Watershed near Corvallis, Oregon, were followed during the summers of 1963 and 1964. The species were Holcus lanatus, Lotus crassifolius var. subglaber, Gaultheria shallon, Berberis nervosa, and Acer circinatum; and were dominant plants of...
Resource Type:: Masters Thesis
Full Text:: Redacted for Privacy Dean of Graduate School Date thesis is presented Typed by Velda D. Mullins for

Evolutionary relationships and an investigation of sympatric speciation within Limnanthaceae

Creator:: Meyers, Stephen C.
Abstract:: Limnanthes floccosa ssp. floccosa and L. floccosa ssp. grandiflora are two of five subspecies of Limnanthes floccosa endemic to vernal pools in southern Oregon and northern California. Three seasons of monitoring natural populations have quantified that L. floccosa ssp. grandiflora is always found growing sympatrically with L. floccosa ssp. floccosa...
Resource Type:: Dissertation

An Evaluation of Putative Sympatric Speciation within Limnanthes (Limnanthaceae)

Creator:: Meyers, Stephen C., Liston, Aaron, and Meinke, Robert
Abstract:: Limnanthes floccosa ssp. floccosa and L. floccosa ssp. grandiflora are two of five subspecies within Limnanthes floccosa endemic to vernal pools in southern Oregon and northern California. Three seasons of monitoring natural populations have quantified that L. floccosa ssp. grandiflora is always found growing sympatrically with L. floccosa ssp. floccosa...
Resource Type:: Article
Full Text:: 7 | Issue 5 | e36480 11. Schliewen UK, Kocher TD, McKaye KR, Seehausen O, Tautz D (2006

The genome of the xerotolerant mold Wallemia sebi reveals adaptations to osmotic stress and suggests cryptic sexual reproduction

Creator:: Padamsee, Mahajabeen, Kumar, T. K. Arun, Riley, Robert, Binder, Manfred, Boyd, Alex, Calvo, Ana M., Furukawa, Kentaro, Hesse, Cedar, Hohmann, Stefan, James, Tim Y., LaButti, Kurt, Lapidus, Alla, Lindquist, Erika, Lucas, Susan, Miller, Kari, Shantappa, Sourabha, Grigoriev, Igor V., Hibbett, David S., McLaughlin, David J., Spatafora, Joseph W., and Aime, M. Catherine
Abstract:: Wallemia (Wallemiales, Wallemiomycetes) is a genus of xerophilic Fungi of uncertain phylogenetic position within Basidiomycota. Most commonly found as food contaminants, species of Wallemia have also been isolated from hypersaline environments. The ability to tolerate environments with reduced water activity is rare in Basidiomycota. We sequenced the genome of W....
Resource Type:: Article
Full Text:: Mahajabeen Padamsee a,2, T.K. Arun Kumar b, Robert Riley c, Manfred Binder d, Alex Boyd e, Ana M. Calvo f

The humic water of Klamath Marsh and its effect on the growth of Anabaena cyclindrica Lemm. in culture

Creator:: Peek, Chester Allen
Resource Type:: Dissertation
Full Text:: . D. in Botany (Name) (Degree) (Major) Date thesis is presented May 15, 1963 Title THE HUMIC WATER

Conservation biology of Plagiobothrys hirtus (Boraginaceae) : evaluation of life history and population enhancement

Creator:: Amsberry, Kelly
Abstract:: Plagiobothrys hirtus (Boraginaceae) is a state and federally listed endangered plant found only in Douglas County, Oregon. This vernal pool endemic has historically been threatened by agricultural conversion of seasonal wetlands in the Sutherlin area, and is currently being eradicated as habitat is lost due to the rapid urban development...
Resource Type:: Masters Thesis
Full Text:: pool species as early as 1941 (Hoover 1941), and researchers currently estimate that 60-90% of pools

Thiamin biofortification of crops

Creator:: Goyer, Aymeric
Abstract:: Thiamin is essential for human health. While plants are the ultimate source of thiamin in most human diets, staple foods like white rice have low thiamin content. Therefore, populations whose diets are mainly based on low-thiamin staple crops suffer from thiamin deficiency. Biofortification of rice grain by engineering the thiamin...
Resource Type:: Article
Full Text:: United States: A public health perspective. Nutr Rev 2002, 60:15-26. 7. Lonsdale D: A review of the

A fistful of Astragalus : phenotypic and genotypic basis of the most taxon rich species in the North American flora

Creator:: Knaus, Brian J.
Abstract:: The study of the infra-specific ranks (i.e., subspecies and variety) can be considered the study of the process of speciation. Astragalus lentiginosus Douglas ex Hooker (Fabaceae) is the most taxon rich species in the U.S. flora currently including 40 taxonomic varieties. These varieties were described using traditional taxonomic methods primarily...
Resource Type:: Dissertation
Full Text:: Appendix D. Synonymy of A. lentiginosus .................................... 139 Appendix E. Phylogeny of

Diverse Lifestyles and Strategies of Plant Pathogenesis Encoded in the Genomes of Eighteen Dothideomycetes Fungi

Creator:: Ohm, Robin A., Feau, Nicolas, Henrissat, Bernard, Schoch, Conrad L., Horwitz, Benjamin A., Barry, Kerrie W., Condon, Bradford J., Copeland, Alex C., Dhillon, Braham, Glaser, Fabian, Hesse, Cedar N., Kosti, Idit, LaButti, Kurt, Lindquist, Erika A., Lucas, Susan, Salamov, Asaf A., Bradshaw, Rosie E., Ciuffetti, Lynda, Hamelin, Richard C., Kema, Gert H. J., Lawrence, Christopher, Scott, James A., Spatafora, Joseph W., Turgeon, B. Gillian, de Wit, Pierre J. G. M., Zhong, Shaobin, Goodwin, Stephen B., and Grigoriev, Igor V.
Abstract:: Correction 5 Mar 2013: Ohm RA, Feau N, Henrissat B, Schoch CL, Horwitz BA, et al. (2013) Correction: Diverse Lifestyles and Strategies of Plant Pathogenesis Encoded in the Genomes of Eighteen Dothideomycetes Fungi. PLOS Pathogens 9(3): 10.1371/annotation/fcca88ac-d684-46e0-a483-62af67e777bd
Resource Type:: Article
Full Text:: | Volume 8 | Issue 12 | e1003037 T a b le 1 . Sp e ci e s u se d in th is co m p ar at iv e

Isolation of putative pAgK84 transconjugants from commerical cherry and raspberry plants treated with Agrobacterium radiobacter strain K84

Creator:: Lu, Shu-Fen
Resource Type:: Masters Thesis
Full Text:: suspension was pipetted into 2.7 ml of the opine liquid medium at 0 h (0.D. = 0.01). Bacterial growth was

Phylogenetic insights into the correlates of dioecy in meadow-rues (Thalictrum, Ranunculaceae)

Creator:: Soza, Valerie L., Brunet, Johanne, Liston, Aaron, Smith, Patricia Salles, and Di Stilio, Veronica S.
Abstract:: Numerous studies have examined the evolution of sexual systems in angiosperms, but few explore the interaction between these and the evolution of pollination mode. Wind pollination is often associated with unisexual flowers, but which evolved first and played a causative role in the evolution of the other is unclear. Thalictrum,...
Resource Type:: Article
Full Text:: classification (a) (b) (c) (e) (f) (g) (d) (h) se st ca se st ca Fig. 2. Floral diversity of sexual

Insights into phylogeny, sex function and age of Fragaria based on whole chloroplast genome sequencing

Creator:: Njuguna, Wambui, Liston, Aaron, Cronn, Richard, Ashman, Tia-Lynn, and Bassil, Nahla
Abstract:: The cultivated strawberry is one of the youngest domesticated plants, developed in France in the 1700s from chance hybridization between two western hemisphere octoploid species. However, little is known about the evolution of the species that gave rise to this important fruit crop. Phylogenetic analysis of chloroplast genome sequences of...
Resource Type:: Article
Full Text:: Cronn c, Tia-Lynn Ashman d, Nahla Bassil e aDepartment of Horticulture, Oregon State University, ALS

New perspectives on evolutionary relationships within Pinus (Pinaceae) and within subsection Ponderosae (subgenus Pinus)

Creator:: Willyard, Ann Nachreiner
Abstract:: A fossil-calibrated phylogenetic framework based on exemplars from each of the four taxonomic sections within Pinus was created using multiple nuclear and chloroplast loci. Calibration at the well-defined subgeneric split within Pinus with either fossil leaves and cones (ca. 45 million years ago) or fossil wood (ca. 85 million years...
Resource Type:: Dissertation
Full Text:: , N. T. 1967. The genus Pinus. The Ronald Press Company, New York, NY. Neale, D. B., and O

Molecular and genetic analyses of genome variability in Ustilago hordei

Creator:: Agnan, Jacqueline
Abstract:: Pulsed-field gel electrophoresis (PFGE) of the strains representing the 14 races of U. hordei, the causal agent of covered smut on barley, revealed extensive polymorphism in chromosome length and number. The purpose of this study was to determine by two approaches the exact chromosome number for each U. hordei race,...
Resource Type:: Dissertation
Full Text:: mechanisms of dimorphic growth in fungi. 20 References Abdennadher, M., McCluskey K., and Mills, D

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:: ., Ronald, P., Foster, G. D. 2012. Top 10 plant pathogenic bacteria in molecular plant pathology. Molecular

Susceptibility of Pacific yew (Taxus brevifolia Nutt.) to Phytophthora lateralis

Creator:: Murray, Marion S.
Abstract:: In 1991 Pacific yew (Taxus brevifolia Nutt.) was reported as a new host for Phytophthora lateralis Tucker and Milbrath which is an aggressive root rot pathogen thought previously to be specific to Port-Orford-cedar. This study was designed to compare the pathogenicity of P. lateralis on the two hosts, and to...
Resource Type:: Masters Thesis
Full Text:: . crippsii and gracilis, and C. nootkatensis (D. Don) Spach. Port-Orford-cedar is native to a localized

Irrigated crop research in Oregon's Columbia Basin : 1981 research report

Creator:: Oregon State University. Agricultural Experiment Station and Columbia Basin Agricultural Research Center
Abstract:: Published July 1981. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: 40-acre tract. On April 16, 1931, an executive order signed by President Herbert Hoover set aside

Abandoning Sverdrup’s critical depth hypothesis on phytoplankton blooms

Creator:: Behrenfeld, Michael J.
Abstract:: The Critical Depth Hypothesis formalized by Sverdrup in 1953 posits that vernal phytoplankton blooms occur when surface mixing shoals to a depth shallower than a critical depth horizon defining the point where phytoplankton growth exceeds losses. This hypothesis has since served as a cornerstone in plankton ecology and reﬂects the...
Resource Type:: Article
Full Text:: it (Fig. 4C). Indeed, the mean value of r from mid-December to mid-April at NA-5 is only 0.018/d

The Genome of Tolypocladium inflatum: Evolution, Organization, and Expression of the Cyclosporin Biosynthetic Gene Cluster

Creator:: Bushley, Kathryn E., Raja, Rajani, Jaiswal, Pankaj, Cumbie, Jason S., Nonogaki, Mariko, Boyd, Alexander E., Owensby, C. Alisha, Knaus, Brian J., Elser, Justin, Miller, Daniel, Di, Yanming, McPhail, Kerry L., and Spatafora, Joseph W.
Abstract:: The ascomycete fungus Tolypocladium inflatum, a pathogen of beetle larvae, is best known as the producer of the immunosuppressant drug cyclosporin. The draft genome of T. inflatum strain NRRL 8044 (ATCC 34921), the isolate from which cyclosporin was first isolated, is presented along with comparative analyses of the biosynthesis of...
Resource Type:: Article
Full Text:: -proteinogenic substrates including 2-aminobutyric acid, D-alanine, and (4R)-4- [(E)-2-butenyl]-4-methyl

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:: ) Date thesis is presented Ph. D. in Plant Ecology (Degree) (Major) Title AN ANALYSIS OF MONTANE

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:: algorithm known as CLUSB (provided by C. D. McIntire, Department of Botany and Plant Path- ology, Oregon

Mitigating cyanobacterial harmful algae blooms : the role of plant humics

Creator:: Theis, Susan A. F.
Abstract:: Cyanobacterial harmful algae blooms (cyanoHABs) are a growing concern worldwide due to damage of ecosystems and threats to human health. Previous research indicates that plant humics from aquatic and wetland vascular plants are effective inhibitors of cyanobacterial metabolism and growth and may be useful as control agents for mitigating cyanoHABs....
Resource Type:: Masters Thesis
Full Text:: doses (g/L) and growth rates (µ/d) of Microcystis.........................……………………….………………....42

The effects of defoliation on Bromus tectorum seed production and growth

Creator:: Mayer, Kara Hempy
Abstract:: Cheatgrass (Bromus tectorum L.) is a widespread exotic weed in the Intermountain sagebrush steppe. An annual grass, it is highly prolific and very competitive with native perennial grass seedlings. A clipping experiment carried out at two cheatgrass-dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation...
Resource Type:: Masters Thesis
Full Text:: /ni) ............................. 46 1 D. Succor Creek residual plot of final density (log plants

Molecular karyotyping of Ustilago hordei and related smut fungi

Creator:: McCluskey, Kevin
Resource Type:: Dissertation
Full Text:: hampered by the small sizes of the chromosomes (Fincham et d., 1979), poor metaphase condensation

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