Index Catalog // ScholarsArchive@OSU

Measuring and modeling gene flow from hybrid poplar plantations : implications for transgenic risk assessment

Creator:: DiFazio, Stephen P.
Abstract:: Hybrid poplar plantations (Populus trichocarpa x Populus deltoides) are a relatively new feature on the landscape in the Pacific Northwest of the United States, and these plantations may soon include genetically engineered trees. Meanwhile, many wild poplar populations (Populus spp.) are highly degraded due in part to logging, dams, grazing,...
Resource Type:: Dissertation

Chloroplast DNA variability and phylogeny in the California closed cone pines

Creator:: Hong, Yong-pyo, 1958-
Abstract:: Chloroplast DNA (cpDNA) variability and phylogeny were studied via analysis of restriction site mutations and DNA sequencing in a complex of three closely related species of pines: Pinus radiata D. Don, P. attenuata Lemm., and muricata D. Don. Genomic DNA from 384 trees representing 20 populations in the complex were...
Resource Type:: Dissertation

Nitrogen dynamics across silvicultural canopy gaps in young forests of western Oregon

Creator:: Thiel, Aaron L.
Abstract:: Silvicultural canopy gaps are emerging as an alternative management tool to accelerate development of complex forest structure in young, even-aged forests of the Pacific Northwest. I investigated patterns of nitrogen (N) availability along transects through 0.1 and 0.4 ha silvicultural gaps in three 50-70 year old Douglas-fir forests of western...
Resource Type:: Masters Thesis
Full Text:: Steven S. Perakis Silvicultural canopy gaps are emerging as an alternative management tool to

Stand development after 20-years of growth in Douglas-fir and red alder mixtures

Creator:: Garrelts, Brennan T.
Abstract:: This study examines the long-term role of interference on stand development of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) and red alder (Alnus rubra Bong.) planted mixtures in the Central Cascades of Oregon, USA. The two species are common associates in naturally regenerated and planted conifer stands in the Pacific Northwest. Due...
Resource Type:: Masters Thesis
Full Text:: Mixtures Abstract approved: Steven R. Radosevich This study examines the long

Calcium-oxalate in sites of contrasting nutrient status in the Coast Range of Oregon

Creator:: Dauer, Jenny M.
Abstract:: Calcium (Ca) is an essential macronutrient that is increasingly recognized as a biogeochemical factor that influences ecosystem structure and function. Progress in understanding the sustainability of ecosystem Ca supply has been hampered by a lack of information on the various forms and pools of Ca in forest ecosystems. In particular,...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________________________ Steven S. Perakis Calcium (Ca) is an essential macronutrient that is increasingly

Growth, morphology, and in vitro development of transgenic poplars with RNAi-inhibited PtDDM1-1/2 gene expression

Creator:: Zhu, Ruoqing
Abstract:: Epigenetic mechanisms are important for control of plant development, and may play a particularly important role in trees given their long life cycles and distinctive and stable tissue types. To help understand the role of epigenetics in tree development, we produced transgenic poplars with reduced activity of the DDM1 genes,...
Resource Type:: Masters Thesis
Full Text:: Expression Abstract approved: _______________________________________________________________ Steven

Tree species-soils relationships in old-growth forests of the Oregon Coast Range

Creator:: Cross, Alison
Abstract:: Tree species directly and indirectly affect soil nutrient cycles. I sought to characterize soils and foliage associated with four common canopy tree species (Douglas-fir, western hemlock, western redcedar, and bigleaf maple) in mixed-species old-growth forests of the Oregon Coast Range and to determine whether and how soils differ among the...
Resource Type:: Masters Thesis
Full Text:: : __________________________________________________________________ Steven S. Perakis Tree species directly and indirectly affect soil nutrient cycles. I

Effectiveness of protected area management in Thailand

Creator:: Maneesai, Ronasit
Abstract:: The main objectives of this study are to identify the nature of threats to protected areas and assess the effectiveness of protected area systems and management in Thailand, and to evaluate the use of conservation biology concepts in protected area management. The results from a survey of the heads of...
Resource Type:: Dissertation

Evaluation of transgenes for stress tolerance, lignin modification, and growth enhancement in poplar

Creator:: Elias, Ani Anna
Abstract:: We evaluated genes previously identified from a large scale functional genomics screen for their potential value to help enhance carbon sequestration in planted trees. We used poplar as a model tree species because of its abundant genetic variation, ease of gene transfer, and availability of large databases for genomic, anatomical,...
Resource Type:: Masters Thesis
Full Text:: Poplar. Abstract approved: Steven H. Strauss We evaluated genes previously identified from a

Structure and expression of two Populus trichocarpa homologs of the floral homeotic gene AGAMOUS

Creator:: Brunner, Amy Marie
Abstract:: Because of their small genomes, facile clonal propagation, fast growth, and susceptibility to Agrobacterium transformation, poplars (genus Populus) are widely considered model systems for the application of molecular genetics and biotechnology in forestry. However, a major concern over commercial use of genetically engineered trees is the release of transgenes into...
Resource Type:: Dissertation

ScholarsArchive@OSU

Measuring and modeling gene flow from hybrid poplar plantations : implications for transgenic risk assessment

Chloroplast DNA variability and phylogeny in the California closed cone pines

Nitrogen dynamics across silvicultural canopy gaps in young forests of western Oregon

Stand development after 20-years of growth in Douglas-fir and red alder mixtures

Calcium-oxalate in sites of contrasting nutrient status in the Coast Range of Oregon

Growth, morphology, and in vitro development of transgenic poplars with RNAi-inhibited PtDDM1-1/2 gene expression

Tree species-soils relationships in old-growth forests of the Oregon Coast Range

Effectiveness of protected area management in Thailand

Evaluation of transgenes for stress tolerance, lignin modification, and growth enhancement in poplar

Structure and expression of two Populus trichocarpa homologs of the floral homeotic gene AGAMOUS

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