Digital Commons Network^™

Uptake And Transformation Of Trichloroethylene By Hybrid Poplar: Laboratory Studies, Julie K. Chard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Trichloroethylene (TCE) was widely used as an industrial solvent and degreasing agent for most of the twentieth century. It is now a widespread groundwater contaminant. Phytoremediation may be a cost-effective cleanup method for TCE-contaminated soils and groundwater. Studies of environmental TCE fate are complicated by its volatility. The literature reports both significant and insignificant plant uptake of TCE. Conflicting findings may be due to differences in exposure level, conditions, and duration of the studies, or to experimental artifacts from laboratory systems.

This research quantified plant uptake and volatilization of TCE using a unique laboratory system. Hybrid poplar trees were exposed …

Effects Of Safflower (A Spring Crop), And Wheat Planting Date On Controlling Jointed Goatgrass (Aegilops Cylindrica) In Winter Wheat, Caleb Dale Dalley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To improve management and control of jointed goatgrass (Aegilops cylindrica Host.) on traditional winter wheat (Triticum aestivum L.) cropland, a better understanding of the effects spring crop and wheat planting date have on weed populations and wheat yield is needed. A study of the effects of safflower (a spring crop) and wheat planting dates (early vs late) was conducted over a 2-yr period. Long term effects will be examined over a 5-yr period. The effects these treatments had on yield, weed seed contamination, jointed goatgrass population density, and soil seedbank concentration were measured. Two identical experiments were initiated, …

Effect Of Blue Light And Temperature On Leaf Expansion, Stem Elongation, And Growth, Tracy A. O. Dougher

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Short height and high yield per unit energy in controlled environments are essential to the success of a food production system for spaceflight. Temperature and light quality can be manipulated in controlled environments to reduce plant height and increase yield. Although the effects of temperature on height and yield are well studied at ambient CO₂, temperature effects at elevated CO₂ with a hydroponic root zone are not well characterized. We studied soybean yield and height under two lamp types over a broad range of temperatures. Temperature had little effect on yield or height, but lamp type had …

Investigation Of The Determinants Of African Savanna Vegetation Distribution: A Case Study From The Lower Omo Basin, Ethiopia, Catherine A. Schloeder

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Ethiopian Wildlife Conservation Organization has little information on the extent and ecological determinants of plant species composition and distribution in Omo National Park. Elsewhere, the determinants of African savanna vegetation dynamics have been the focus of numerous investigations, yet our understanding of the hierarchical nature and relative importance of any relationships remains very general. As well, our ability to derive predictions about vegetation responses is limited to extreme generalizations. African savanna landscape ecotones have received even less attention than most landscapes. In this dissertation, I test hypotheses about plant species distribution-determinant relationships in Omo National Park, a park that …

Influence Of Grazing, Fire, And Rainfall Regime On Plant Species Dynamics In An Ethiopian Perennial Grassland, Michael J. Jacobs

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The dominant habitat-type of Omo National Park (ONP), Ethiopia, is grassland. This grassland supports a variety of wild herbivores and indigenous people; the latter hunt large herbivores for subsistence or graze their domestic livestock in the Park. Therefore, an understanding of grassland dynamics is a high priority for ONP management. Grazing and fire are major factors influencing species composition and vegetation change in East African grasslands. Rainfall regime, in turn, can influence both grassland response to grazing and fire. The ONP grasslands occur along a rainfall gradient ranging from subhumid to semiarid. Research objectives were to: (1) test the Milchunas, …

Ultraviolet-B Radiation: Effects On Pollen Of 34 Taxa, And Inheritance Patterns And Carryover Of Radiation Response In Arabidopsis, Javad Torabinejad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although considerable research has addressed effects of elevated ultraviolet-B (UV-8) radiation on vegetative plant structures and processes, the reproductive biology and patterns of inheritance of UV-B tolerance have received much less attention. I examined the effects of UV-B radiation on pollen of 34 taxa. I also addressed questions concerning the patterns of inheritance of UV-B tolerance in Arabidopsis thaliana and examined potential cumulative carryover effects of UV-B exposure through multiple generations of this species.

In the first study, a significant reduction in pollen germination occurred in only five species, but pollen tube growth in more than half of the species …

Environmental Stress And Winterizing Plants, Larry A. Sagers, Jerry L. Goodspeed

Archived Gardening Publications

No abstract provided.

The Vines That Ate Utah, Dennis Hinkamp

All Archived Publications

No abstract provided.

Tomatoes - Tips To Avoid Their Tantrums, Dennis Hinkamp

All Archived Publications

No abstract provided.

The Dirt As Your Canvas, Dennis Hinkamp

All Archived Publications

No abstract provided.

Tent Caterpillars - Are They Setting Up Camp In Your Yard?, Dennis Hinkamp

All Archived Publications

No abstract provided.

Fungus - Nothing Cute About Fairy Rings, Dennis Hinkamp

All Archived Publications

No abstract provided.

Filberts - Nutty Trees, Shrubs And "Trubs", Dennis Hinkamp

All Archived Publications

No abstract provided.

Deicing Compounds And Utah Landscapes, Rich Koenig, Larry Rupp

All Archived Publications

No abstract provided.

Apples From B.C. To Y2k, Dennis Hinkamp

All Archived Publications

No abstract provided.

Pesticide Storage Facility Design And Management Plan, Stephen E. Poe, Howard M. Deer, Kitt Farrell Poe

All Archived Publications

No abstract provided.

Molecular Marker Analysis Of Leymus Flavescens And Chromosome Pairing In Leymus Flavescense Hybrids (Poaceae: Triticae), David Hole, K B. Jensen, R R-C Wang, S M. Clawson

Plants, Soils, and Climate Faculty Publications

Leymus flavescens (Scribner&Smith) Pilger, yellow wild rye, is a long-lived, strongly rhizomatous, tetraploid (2n54x528) perennial grass of the tribe Triticeae distributed throughout centralWashington, eastern Oregon, and the Snake River plains of Idaho. Our objectives were (1) to describe chromosome pairing and fertility in F1 hybrids between L. flavescens and North American tetraploids (2n54x528) L. triticoides and L. cinereus and Eurasian tetraploids L. secalinus, L. racemosus, and L. alaicus subsp. karataviensis and (2) to utilize genome-specific random amplified polymorphic DNA (RAPD) markers to verify the genomic composition of L. flavescens. The hybrids L. flavescens # L. triticoides (NsNsXmXm), L. flavescens # …

'Super Dwarf' Rice: Temperature Studies, Steve Klassen, Bruce Bugbee

Dwarf Crops

Detailed temperature studies are a prerequisite to the optimization of crop productivity because field studies at ambient CO2 provide only a general guide to optimal temperatures. Meristem temperature has a profound effect on crop development rate, and the optimum temperature usually decreases as the crop matures. Previous studies with semi-dwarf rice (Ai-nan-tsao & 29-Lu-1) indicated that temperatures above about 33 ºC reduce seed set if they occur during anthesis. In rice, high temperatures are especially detrimental if there is rapid dark-to-light temperature increase. Conversely, average day/night temperatures in the mid 20's delay heading and cause an undesirable increase in vegetative …

'Usu-Apogee' Wheat - Registration, Bruce Bugbee, G. Koerner, R. Albrechtsen, W. Dewey, S. Clawson

Dwarf Crops

'USU-Apogee' is a full-dwarf hard red spring wheat (Triticum aestivum L.) (NSSL Reg. no. 331390.01; PI 592742) cultivar developed for high yields in controlled environments. USU-Apogee was developed by the Utah Agricultural Experiment Station in cooperation with the National Aeronautics and Space Administration and released in April 1996. NASA is interested in improved food crops for bioregenerative life support systems in space.

Apogee is the point in an orbit farthest from the earth. USU-Apogee is a shorter, higher yielding alternative to 'Yecora Rojo' and 'Veery-10', the short field cultivars previously selected for use in controlled environments (Bugbee and Salisbury, 1988). …

Unique Procedures For Germinating 'Super Dwarf' Rice, Jonathan Frantz, Bruce Bugbee

Dwarf Crops

Rice (Oryza sativa L.) is an important crop for advanced life support, but the height of even full-dwarf cultivars (80-cm tall) has made them difficult to use in controlled environments. We identified a rice mutant that lacks 3ß-hydroxylase, the enzyme responsible for conversion of gibberellic acid 20 (GA20) to GA1 (Murai et al., 1990; Honda et al., 1996). GA1 is the active form of GA in most plants, so this rice variety is extremely short (20-cm tall). ‘Super Dwarf’ rice has a higher harvest index (50%) and similar yield to the commonly used rice cultivars ‘Ai-Nan-Tsao’ and ‘29-Lu-1' and its …

Tomato And Tobacco Hornworms, Jay B. Karren

All Archived Publications

No abstract provided.

Banded Ash Borer, Jay B. Karren

All Archived Publications

No abstract provided.

These Violets Don't Shrink, Dennis Hinkamp

All Archived Publications

No abstract provided.

Weaving Dreams Of Spring Gardens, Dennis Hinkamp

All Archived Publications

No abstract provided.

A Shrub By Any Other Name Is A Bush, Dennis Hinkamp

All Archived Publications

No abstract provided.

Do Organic Watchdogs Work?, Dennis Hinkamp

All Archived Publications

No abstract provided.

Do You Want A Lawn Or A Trout Farm?, Dennis Hinkamp

All Archived Publications

No abstract provided.

Fertilizer Management For Alfalfa, Richard Koenig, Clyde Hurst, James Barnhill, Boyd Kitchen, Marlon Winger, Mike Johnson

All Archived Publications

No abstract provided.

Manure Best Management Practices, Jessica Davis, Richard Koenig, Robert Flynn

All Archived Publications

No abstract provided.

Utah Pesticide Applicator Training, Howard M. Deer

All Archived Publications

No abstract provided.