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Expression Of An Arabidopsis Phosphoglycerate Mutase Homologue Is Localized To Apical Meristems, Regulated By Hormones, And Induced By Sedentary Plant-Parasitic Nematodes, Mitra Mazarei, Kristen A. Lennon, David P. Puthoff, Steven R. Rodermel, Thomas J. Baum Nov 2003

Expression Of An Arabidopsis Phosphoglycerate Mutase Homologue Is Localized To Apical Meristems, Regulated By Hormones, And Induced By Sedentary Plant-Parasitic Nematodes, Mitra Mazarei, Kristen A. Lennon, David P. Puthoff, Steven R. Rodermel, Thomas J. Baum

Plant Pathology and Microbiology Publications

We previously isolated a partial soybean cDNA clone whose transcript abundance is increased upon infection by the sedentary, endoparasitic soybean cyst nematode Heterodera glycines. We now isolated the corresponding full-length cDNA and determined that the predicted gene product was similar to the group of cofactor-dependent phosphoglycerate mutase/bisphosphoglycerate mutase enzymes (PGM/bPGM; EC 5.4.2.1/5.4.2.4). We designated the corresponding soybean gene GmPGM. PGM and bPGM are key catalysts of glycolysis that have been well characterized in animals but not plants. Using the GmPGM cDNA sequence, we identified a homologous Arabidopsis thaliana gene, which we ...


Floral Nectary Fine Structure And Development In Glycine Max L. (Fabaceae), Harry T. Horner, Rosaria A. Healy, Teresa Cervantes-Martinez, Reid G. Palmer Sep 2003

Floral Nectary Fine Structure And Development In Glycine Max L. (Fabaceae), Harry T. Horner, Rosaria A. Healy, Teresa Cervantes-Martinez, Reid G. Palmer

Botany Publication and Papers

Floral nectaries of annual cultivated Glycine max develop between the bases of the central gynoecium and lateral stamen ring. Each discoid nectary forms immediately before flower opening and degenerates within 24 h. Three stages of nectary development are identified: preactive, active, and postactive. Preactive and active nectaries are composed of a single-layered epidermis that contains many open stomata, with guard cells having thickened walls, starch-engorged plastids, and other organelles. The major portion of each nectary consists of thin-walled special parenchyma cells, each having dense cytoplasm with a nucleus, Golgi bodies and vesicles, mitochondria, plastids, endoplasmic reticulum, many ribosomes, and one ...


Analysis Of The Effects Of Hypogeal And Epigeal Emergence On Seedling Competition In Legumes, Keith E. King May 2003

Analysis Of The Effects Of Hypogeal And Epigeal Emergence On Seedling Competition In Legumes, Keith E. King

McCabe Thesis Collection

Seedling emergence is either hypogeal or epigeal. In hypogeal emergence the cotyledons remain below the soil surface during seedling development, while in epigeal emergence the cotyledons extend above the soil surface due to elongation of the hypocotyl. Here we examine the effect of seed size, and emergence type, on seedling growth. Six legumes with variation in seed size and either epigeal or hypogeal emergence were grown under dark and light conditions. A competition study was also conducted where a hypogeal and epigeal legume were grown in combination with wheat and ryegrass. Legumes expressing epigeal emergence were cowpea (Vigna unguiculata), mung ...


Impacts Of Small Mammals And Birds On Low-Tillage, Dryland Crops, Ray T. Sterner, Brett E. Petersen, Stanley E. Gaddis, Kenneth L. Tope, David J. Poss Apr 2003

Impacts Of Small Mammals And Birds On Low-Tillage, Dryland Crops, Ray T. Sterner, Brett E. Petersen, Stanley E. Gaddis, Kenneth L. Tope, David J. Poss

USDA National Wildlife Research Center - Staff Publications

During 2000–2001, small mammals, birds, and potential corn/soybean damage were studied at a low-tillage, non-irrigated agricultural research site in the Colorado Piedmont. A small mammal surveyinvolved four trapping sessions and 18, 12-live-trap grids each. Within years, two grids each were placed at random, fixed locations in experimental corn, fallow, millet, pea, soybean, sunflower, and wheat plots at the site; two off-plot grids each were set at random, fixed locations <100m from the north and south edge of these plots. In 2001, periodic bird observations were conducted, and damage to corn and soybean plants was assessed. Capture rates were low during all trap sessions (range 0.1%–3.3%, Χ̅ = 2:2%). Sixty-three small mammals were captured and 39 were recaptured. Captures included deer mouse (Peromyscus maniculatus), northern grasshopper mouse (Onychomys leucogaster), thirteen-lined ground squirrel (Spermophilus tridecemlineatus), and western harvest mouse (Reithrodontomys megalotis). Deer mice accounted for 56 of the initial captures (88.9 ...


The Soybean - Our Great Treasure, Mary E. Norton Apr 2003

The Soybean - Our Great Treasure, Mary E. Norton

ESSAI

No abstract provided.


Ec03-101 Nebraska Seed Guide, 2004, Lenis Alton Nelson, Robert N. Klein, Roger Wesley Elmore, David D. Baltensperger, Charles A. Shapiro, Stevan Z. Knezevic, James Krall Jan 2003

Ec03-101 Nebraska Seed Guide, 2004, Lenis Alton Nelson, Robert N. Klein, Roger Wesley Elmore, David D. Baltensperger, Charles A. Shapiro, Stevan Z. Knezevic, James Krall

Historical Materials from University of Nebraska-Lincoln Extension

This circular is a progress report of corn hybrid performance tests conducted by the Agronomy/Horticulture Department and the Northeast, South Central, West Central and Panhandle Research and Extension Centers of Nebraska and University of Wyoming at Torrington. Conduct of experiments and publication of results is a joint effort of the Agricultural Research Division and the Cooperative Extension Service.


Imported Longhorned Weevil (Coleoptera: Curculionidae) Injury To Soybean: Physiological Response And Injury Guild-Level Economic Injury Levels, Thomas E. Hunt, Leon G. Higley, Fikru J. Haile Jan 2003

Imported Longhorned Weevil (Coleoptera: Curculionidae) Injury To Soybean: Physiological Response And Injury Guild-Level Economic Injury Levels, Thomas E. Hunt, Leon G. Higley, Fikru J. Haile

Faculty Publications: Department of Entomology

The imported longhorned weevil, Calomycterus setarius Roelofs, is an occasional pest of soybean, Glycine max (L.), and can cause substantial defoliation of seedling soybean when the weevil is present in large numbers. Because weevil populations can reach high levels, the potential exists for significant seedling injury, so economic injury levels (EILs) are needed for imported longhorned weevil on seedling soybean. Because the bean leaf beetle, Cerotoma trifurcata (Forster), also is present on seedling soybean, injury by this insect should be included in EIL calculations. This study was conducted to (1) determine daily soybean consumption rates of imported longhorned weevil; (2 ...


The Probabilistic Economic Injury Level: Incorporating Uncertainty Into Pest Management Decision-Making, Robert K. D. Peterson, Thomas E. Hunt Jan 2003

The Probabilistic Economic Injury Level: Incorporating Uncertainty Into Pest Management Decision-Making, Robert K. D. Peterson, Thomas E. Hunt

Faculty Publications: Department of Entomology

Despite the recognition that the economic injury level (EIL) is determined by dynamic biological and economic parameters, which can be highly variable and uncertain, there has been little effort to quantify uncertainty and to use estimates of uncertainty in the determination of EILs. In this paper, we define the probabilistic EIL (PEIL) and develop PEILs for two insect pest scenarios: alfalfa weevil larvae, Hypera postica (Gyllenhal), on early bud-stage alfalfa, and bean leaf beetle adults, Cerotoma trifurcata (Forster), on V1-stage soybean. The PEIL is an EIL that reflects its probability of occurrence. The probability of occurrence is determined by incorporating ...


Ec03-1892 Identifying Soybean Rust Jan 2003

Ec03-1892 Identifying Soybean Rust

Historical Materials from University of Nebraska-Lincoln Extension

This four-color extension circular identifies the different diseases of soybeans: soybean rust, bacterial blight, bacterial pustle, and downy mildew. It also shows diseases that are similar looking: Cercospora blight, Frogeye leaf spot and brown spot. It also discusses what to look for when scouting for soybean rust.


Ec03-883 Crop And Livestock Prices For Nebraska Producers, 1960-2003, Darrell R. Mark, Dillon Feuz, Roger Selley, Tina N. Barrett Jan 2003

Ec03-883 Crop And Livestock Prices For Nebraska Producers, 1960-2003, Darrell R. Mark, Dillon Feuz, Roger Selley, Tina N. Barrett

Historical Materials from University of Nebraska-Lincoln Extension

This report contains historical price data for the major crops and livestock commodities produced in Nebraska. Prices received by producers are reported for 1960-2002 for most of the commodities.

The data was compiled from Nebraska Agricultural Statistics Services and Agricultural Prices, National Agricultural Statistics Service, USDA; Oil Crops Situation and Outlook, Economic Research Service, USDA; Cotton and Wool Outlook, Economic Research Service, USDA; and Livestock and Grain Market News, Agricultural Marketing Service, USDA. Sources of prices for each commodity are indicated on the tables.