Index Catalog // ScholarsArchive@OSU

Serpentine and non-serpentine edaphic ecology and the recovery of Lomatium cookii (Apiaceae), an endangered endemic of southwest Oregon

Creator:: Silvernail, Ian S.
Abstract:: The role of unusual geologies in plant distribution and form is well-known. Serpentine (ultramafic) soils exert a particularly strong influence on plants, as evidenced by a high level of endemism and the morphological and physiological traits displayed in adaptation to the extraordinary chemistry of these substrates. Adaptation may lead to...
Resource Type:: Masters Thesis
Full Text:: Ian S. Silvernail for the degree of Master of Science in Botany and Plant Pathology presented on

Influence of atmospheric humidity on sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor.

Creator:: Hural, Kirsten
Abstract:: The influence of atmospheric humidity on three aspects of sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor., which causes rose powdery mildew, was studied on leaf disks of susceptible Rosa cultivar Samantha. To study conidiophore production, leaf disks were inoculated on the adaxial (upper) surface with conidia of S....
Resource Type:: Masters Thesis
Full Text:: were inoculated on the adaxial (upper) surface with conidia of S. pannosa race 2 and incubated at 21 C

Responses of algal populations to parasitism by Aphelidium chlorococcarum and chytrids in an Oregon sewage lagoon

Creator:: Woods, Wendy W.
Abstract:: The abundance of algal species and their parasites was monitored weekly for two years in a sewage lagoon at the Corvallis Airport, Oregon. During the cooler months, Euglena species were dominant followed by a Chlamydomonas assemblage in the spring and a predominantly Scenedesmus assemblage in the summer and fall. Parasites...
Resource Type:: Dissertation
Full Text:: S. armatus for a month. Other declines after severe parasitism were small and lasted approximately

Biology and control of Fusarium spp. on Douglas-fir (Pseudotsuga menziesii)

Creator:: Hoefnagels, Mariëlle Henriette, 1965-
Abstract:: Fusarium spp. are among the most important pathogens of Douglas-fir (Pseudotsuga menziesii) seedlings in bareroot nurseries. Currently the most effective disease control method is soil fumigation with methyl bromide. As methyl bromide is phased out, however, other disease management strategies may become more important. We explored two alternative approaches to...
Resource Type:: Dissertation
Full Text:: of Fusarium spp 126 Appendix B Fusarium Recovery from Douglas-fir Seeds Representing 43

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Creator:: Schisler, David Albert
Abstract:: Fusarium spp. frequent conifer nursery soils yet are rarely recovered from coniferous forest soils. Experiments were performed to determine what influence humic-rich organic amendments and volatiles from soil, ectomycorrhizal fungi and ectomycorrhizae have on the populations of several physiologic and taxonomic microbial groups potentially related to this phenomenon. A comparative...
Resource Type:: Dissertation
Full Text:: -fixers N1 4.9E+07 b 2.7E+03 1.1E+05 1.4E+02 7.5E+06 9.8E+05 8.6E+06 4.6E+05 N2 2.1E+08 1.1E+06 2.8E+06

Characterization of fungal and bacterial communities associated with mat-forming ectomycorrhizal fungi from old-growth stands in the H.J. Andrews Experimental Forest

Creator:: Hesse, Cedar N.
Abstract:: Mat-forming ectomycorrhizal (EcM) fungi represent a prevalent constituent of many temperate forest ecosystems and create dramatic changes in soil structure and chemistry. EcM mat soil have been shown to have increased microbial respiration rates and have been hypothesized to harbor unique assemblages of fungi and bacteria. The objectives of this...
Resource Type:: Dissertation
Full Text:: my thesis committee; P.J. Bottomley, D.J. Arp, B. McCune, and T.M. Filtz, as well as former

Biology, epidemiology, and biological and chemical control of Phytophthora vignae

Creator:: Fernando, W. Gerard Dilantha
Abstract:: Phytophthora vignae, causal agent of stem and root rot of cowpea (Vigna unguiculata), was reported for the first time in Sri Lanka. The pathogen was found in cowpea field soils from 3 of 5 geographic regions sampled. Only one site however, had plants exhibiting disease symptoms. Of the eight cowpea...
Resource Type:: Dissertation
Full Text:: Lanka, which reported the presence of P. vignae in Sri Lanka for the first time. B. Sivakadadcham

Interactions of ammonia monooxygenase in Nitrosomonas europaea with hydrocarbons and substituted hydrocarbons

Creator:: Keener, William Kelvin
Resource Type:: Dissertation
Full Text:: inactivation of NH3-dependent 02 uptake by 1,2-dimethylcyclopropane 111 4.3 B. Rep lot yielding pseudo first

The effects of abscisic acid on gene expression during embryogenesis in wheat

Creator:: Williamson, John D. (John David), 1948-
Resource Type:: Dissertation
Full Text:: , GA, GM, hnRNA, NaCl/Cit, PAGE, poly(A)+RNA, S-30, SDS, TE, WGA, bp, kb, kD, ng, Pg, Pg

ScholarsArchive@OSU

Serpentine and non-serpentine edaphic ecology and the recovery of Lomatium cookii (Apiaceae), an endangered endemic of southwest Oregon

Influence of atmospheric humidity on sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor.

Responses of algal populations to parasitism by Aphelidium chlorococcarum and chytrids in an Oregon sewage lagoon

Biology and control of Fusarium spp. on Douglas-fir (Pseudotsuga menziesii)

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Characterization of fungal and bacterial communities associated with mat-forming ectomycorrhizal fungi from old-growth stands in the H.J. Andrews Experimental Forest

Biology, epidemiology, and biological and chemical control of Phytophthora vignae

Interactions of ammonia monooxygenase in Nitrosomonas europaea with hydrocarbons and substituted hydrocarbons

The effects of abscisic acid on gene expression during embryogenesis in wheat

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