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Effects of current velocity, irradiance, and herbivory on algal assemblages in laboratory streams

Creator:: Steinman, Alan D.
Abstract:: Effects of current velocity, irradiance, and grazing on the biomass, taxonomic structure, physiognomy, and chemical composition of lotic algal assemblages were investigated. Four experiments, lasting 32 to 75 days, were conducted in laboratory streams to determine how these factors affect algal assemblages singly, and in concert with each other. Regardless...
Resource Type:: Dissertation
Full Text:: STRUCTURE OF ALGAL ASSEMBLAGES IN LABORATORY STREAMS ALAN D. STEINMAN AND C. DAVID MCINTIRE Department of

Characterization of the replication, incompatibility, and recombination regions of Pseudomonas syringae pv. phaseolicola plasmid pEXC8080

Creator:: Poplawsky, Alan R.
Resource Type:: Dissertation
Full Text:: Alan R. Poplawsky for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on

Phylogeny, cospeciation, and host switching in the evolution of the ascomycete genus Rhabdocline on Pseudotsuga and Larix (Pinaceae)

Creator:: Gernandt, David S.
Abstract:: The relative role of cospeciation and host switching in the phylogenetic history of ascomycete foliar symbionts is addressed in the orders Leotiales and Rhytismatales, fungi associated predominantly with Pinaceae (Coniferales). Emphasis is placed on comparing the evolution of the sister genera Pseudotsuga and Larix (Pinaceae) with that of the pathogenic...
Resource Type:: Dissertation
Full Text:: OF David S. Gernandt for the degree of Doctor of Philosophy in Botany and Plant Pathology

Cytokinin O-glycosyltransferases : biochemical characteristics in vitro and developmental regulation in transgenic plants

Creator:: Veach, Yeonjin Kim
Abstract:: Cytokinins are plant hormones regulating cell division and differentiation. Most developmental events from germination, vegetative morphogenesis to seed and fruit set are influenced by cytokinins. t,ns-Zeatin is the major natural occurring cytokinin. Its isomer, cis-zeatin, and its derivatives are usually present in low quantities and have traditionally been considered as...
Resource Type:: Masters Thesis
Full Text:: also want to thank Professor David Mok for assisting me through his knowledge and excellent microscopy

Identification and distribution of the mating-type locus and development of cleistothecia of Podosphaera macularis

Creator:: Wolfenbarger, Sierra N.
Abstract:: Podosphaera macularis, causal agent of hop powdery mildew, is known to produce cleistothecia (syn. chasmothecia) in eastern North America and Europe, but ascocarps are not reported from the Pacific Northwestern region of North America. Reasons for the apparent absence of cleistothecia in the Pacific Northwest are unknown. We established that...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ David H. Gent Podosphaera macularis, causal agent of hop powdery mildew, is known to

Grazer-periphyton interactions in laboratory streams

Creator:: Sumner, William T.
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Redacted for Privacy C. David McIntire The effects of grazing, light intensity, and

Growth and nutrient content of Chamaecyparis lawsoniana seedlings from contrasting soils in Coos County, Oregon

Creator:: Plocher, Milton David
Resource Type:: Masters Thesis
Full Text:: seedlings from contrasting soils in Coos County, Oregon AN ABSTRACT OF THE THESIS OF MILTON DAVID PLOCHER

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:: launch into my academic friends and colleagues, I want to thank David Clark, a friend since second grade

Factors affecting establishment and germination of upland prairie species of conservation concern in the Willamette Valley, Oregon

Creator:: Jones, Katherine D.
Abstract:: Identifying mechanisms that determine who lives and dies is the first step in developing successful restoration techniques for rare species and endangered habitats. We studied interactions that affect establishment of native plant forbs of conservation concern at the seedling stage to support the theoretical basis for restoration activities in Pacific...
Resource Type:: Masters Thesis
Full Text:: more economical to use seed for reintroductions than to use transplants (Kaye and Cramer 2003

The Use and Role of Predictive Systems in Disease Management

Creator:: Gent, David H., Mahaffee, Walter F., McRoberts, Neil, and Pfender, William F.
Abstract:: Disease predictive systems are intended to be management aids. With a few exceptions, these systems typically do not have direct sustained use by growers. Rather, their impact is mostly pedagogic and indirect, improving recommendations from farm advisers and shaping management concepts. The degree to which a system is consulted depends...
Resource Type:: Article
Full Text:: PY51CH13-Gent ARI 2 July 2013 11:59 The Use and Role of Predictive Systems in Disease Management David H

ScholarsArchive@OSU

Effects of current velocity, irradiance, and herbivory on algal assemblages in laboratory streams

Characterization of the replication, incompatibility, and recombination regions of Pseudomonas syringae pv. phaseolicola plasmid pEXC8080

Phylogeny, cospeciation, and host switching in the evolution of the ascomycete genus Rhabdocline on Pseudotsuga and Larix (Pinaceae)

Cytokinin O-glycosyltransferases : biochemical characteristics in vitro and developmental regulation in transgenic plants

Identification and distribution of the mating-type locus and development of cleistothecia of Podosphaera macularis

Grazer-periphyton interactions in laboratory streams

Growth and nutrient content of Chamaecyparis lawsoniana seedlings from contrasting soils in Coos County, Oregon

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

Factors affecting establishment and germination of upland prairie species of conservation concern in the Willamette Valley, Oregon

The Use and Role of Predictive Systems in Disease Management

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