Sugar pine and western white pine are widely distributed, economically valuable, and ecologically important native tree species in North America. However, white pine blister rust (WPBR), caused by a non-native fungal pathogen, Cronartium ribicola J.C. Fisch. in Rabh., has substantially affected populations of these species. Cronartium is an obligate parasite,...
Douglas-fir (Pseudotsuga menziesii) is a widely distributed, ecologically important, and commercially valuable tree species in North America. However, climate change is expected to adversely impact Douglas-fir trees, and assisted migration may become necessary to lessen the effects of climate change. Because drought stress is one of the projected effects of...
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Glenn Thomas Howe
Douglas-fir (Pseudotsuga menziesii) is a widely distributed, ecologically
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,...
Data on motor carrier commodity weights collected in 1976
at Oregon weigh stations by the Public Utilities Commission and the
Department of Transportation are not in a form that readily allows
for commodity flow analysis. A methodology is presented that reduces
existing forest product commodity data into a graphically displayed...
Image-based dietary intake assessment (IBDIA) is a new way by which the accuracy of dietary assessment can be improved through the use of digital images of food. The ability of nutrition and dietetics students and interns to accurately interpret images for diet intake assessment is currently unknown. An online survey...
A method for Agrobacterium-mediated transformation of hybrid
poplar (Populus alba x P. grandidentata) suspension cultures and
regeneration of transformed plants is described. The best protocol
was one in which suspension cultures were inoculated with
Agrobacterium tumefaciens to a density of 10⁷ cfu's/ml, cocultivated
for 48 hours, plated to cellulose acetate...
Characiform fishes form one of the most diverse freshwater fish clades in the world. Comprising more than 2000 species and distributed primarily in South America and Africa, characiforms vary dramatically in their ecomorphology. However, the evolutionary processes responsible for the immense ecomorphological diversity remains unknown. Recently, a study postulated that...
The Altar Valley is an important working landscape that supports biodiversity and vulnerable species in Pima County, Arizona (Huckelberry 2000). This semi-desert grassland, alluvial valley and 713,807-acre watershed composed of 39 subbasins serves as an aquifer to a portion of southwestern Tucson. This region of Southern Arizona has been identified...
The objectives of this study are to determine:
• How the time of leaf pulling affects Pinot noir fruit quality and composition
• How the intensity of leaf pulling affects Pinot noir fruit quality and composition
• If there is a difference in fruit quality and composition when lateral leafs...
Daily cyclical changes of light are brought on by the axial rotation of the Earth while seasonal changes in light are caused by Earth’s tilt as it revolves around the sun. Major life history traits, such as development, which are tied to metabolic processes, have a strong link to the...