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Remote Sensing To Detect The Movement Of Wheat Curl Mites Through The Spatial Spread Of Virus Symptoms, And Identification Of Thrips As Predators Of Wheat Curl Mites, Abby R. Stilwell
Department of Entomology: Dissertations, Theses, and Student Research
The wheat curl mite (WCM), Aceria tosichella Keifer, transmits three viruses to winter wheat: wheat streak mosaic virus, High Plains virus, and Triticum mosaic virus. This virus complex causes yellowing of the foliage and stunting of plants. WCMs disperse by wind, and an increased understanding of mite movement and subsequent virus spread is necessary in determining the risk of serious virus infections in winter wheat. These risk parameters will help growers make better decisions regarding WCM management. The objectives of this study were to evaluate the capabilities of remote sensing to identify virus infected plants and to establish the potential …
Education In Plant Pathology Present Status And Future Challenges, James Macdonald, Caitilyn Allen, David Gadoury, William Jacobi, Segenet Kelemu, James Moyer, Tim Murray, Kevin Ong, Charles Pearson, John Sherwood, Ann Vidaver
Education In Plant Pathology Present Status And Future Challenges, James Macdonald, Caitilyn Allen, David Gadoury, William Jacobi, Segenet Kelemu, James Moyer, Tim Murray, Kevin Ong, Charles Pearson, John Sherwood, Ann Vidaver
Department of Plant Pathology: Faculty Publications
Plant pathology is largely a mission driven discipline that seeks to increase the fundamental understanding of host–pathogen interactions and the etiology of plant diseases for the purpose of preventing or mitigating crop loss. This is an important mission because all nations face serious challenges in their efforts to prevent disease on plants cultivated for food, fiber, ornamental use, timber, and fuel, as well as those growing in native ecosystems. In 1994, it was estimated that global losses due to plant diseases ranged from 9.7 to 14.2% of potential yield (12).
Patterns Of Bison Hair Use In Nests Of Tallgrass Prairie Birds, Bryan R. Coppedge
Patterns Of Bison Hair Use In Nests Of Tallgrass Prairie Birds, Bryan R. Coppedge
The Prairie Naturalist
I examined patterns of bison (Bison bison L.) hair use by passerine birds nesting in the Tallgrass Prairie Preserve, Osage County, Oklahoma, 2002-2004. I collected and dissected 103 nests of 15 species into their constituent components. Nests were predominately composed of herbaceous material such as grass stems and leaves. Woody material and mud were rarely used. Bison hair was the most prominent zoological material used in nests, with lesser amounts and occurrence of arthropod silk, snake skin, feathers, jack rabbit (Lepus californicus Oray) fur, and man-made materials such as cellophane and string. At least one nest of 13 …
Observations Of Badgers Preying On Black-Tailed Prairie Dogs, Daniel S. Licht
Observations Of Badgers Preying On Black-Tailed Prairie Dogs, Daniel S. Licht
The Prairie Naturalist
American badgers (Taxidea taxus) often visit black-tailed prairie dog (Cynomys ludovicianus) colonies, most likely in search of prey (Lomolino and Smith 2004, Shaughnessy and Cifelli 2004). Badgers are well suited to hunting fossorial prey such as prairie dogs by excavating burrows and capturing individuals belowground (Lindzey 2003). However, the ecological literature is sparse regarding details of how badgers hunt and capture prairie dogs underground. Eads and Biggins (2008) documented three occurrences of a badger excavating prairie dogs. That badger (apparently the same individual) had a den within the prairie dog town where captures occurred. This note …
Monitoring Meadows With A Modified Robel Pole In The Northern Black Hills, South Dakota, Daniel W, Uresk, Daryl E. Mergen, Ted A. Benzon
Monitoring Meadows With A Modified Robel Pole In The Northern Black Hills, South Dakota, Daniel W, Uresk, Daryl E. Mergen, Ted A. Benzon
The Prairie Naturalist
We used a modified Robel pole to measure vegetation for a study conducted in the northern Black Hills, South Dakota. Objectives were to determine the relationship between visual obstruction readings and clipped standing herbage, and develop guidelines for monitoring standing herbage. The relationship between visual obstruction readings and standing herbage was linear and regression coefficients were significant (P≤ 0.001). Herbage ranged from 140 to 3313 kg· ha-1 with a mean of 1386 kg· ha-1 (SE = 320 kg· ha-1) for 123 transects. Visual obstruction readings (VOR) ranged from 0.6 to 30.4 (number of 1.27 cm bands …
Mortality Of Cranes (Gruidae) Associated With Powerlines Over A Major Roost On The Platte River, Nebraska, Gregory D. Wright, Timothy J. Smith, Robert K. Murphy, Jeffery T. Runge, Robert R. Harms
Mortality Of Cranes (Gruidae) Associated With Powerlines Over A Major Roost On The Platte River, Nebraska, Gregory D. Wright, Timothy J. Smith, Robert K. Murphy, Jeffery T. Runge, Robert R. Harms
The Prairie Naturalist
Two 69-kilovolt powerlines spanning the Platte River in south central Nebraska are suspected to cause substantial mortality to sandhill cranes (Grus canadensis) and pose a threat to endangered whooping cranes (G. americana) that roost overnight on the river during spring and fall migrations. Most studies of crane collisions with powerlines in the region have focused on counts of carcasses away from night roosts on the river and none have accounted for potential biases in detecting carcasses. We found 61 carcasses of sandhill cranes below over-river segments of the two powerlines during 4 March to 7 April …
Noteworthy Winter Prey Of Short-Eared Owls In Southern Texas: A Case Study, Damon Williford, Marc C. Woodin, Mary Kay Skoruppa
Noteworthy Winter Prey Of Short-Eared Owls In Southern Texas: A Case Study, Damon Williford, Marc C. Woodin, Mary Kay Skoruppa
The Prairie Naturalist
The winter range of North American short-eared owls (Asio flammeus) encompasses much of the United States, including southern Texas, where it is a common winter resident (Oberholser 1974, Rappole and Blacklock 1985). Winter food habits of short-eared owls are relatively weJl documented, but the majority of investigations have been conducted in eastern Canada and northeastern U.S. (Clark 1975, Holt 1993); midwestern U.S. (Colvin and Spaulding 1983); and British Columbia and Pacific northwestern U.S. (Bogiatto et al. 2001). The short-eared owl has a narrow trophic niche, generally preying on small mammals, with voles (Microtus spp.) and deer mice …
Bed Site Selection Of Fawn Pronghorn In Custer State Park, South Dakota, Chad P. Lehman, Jamin D. Hartland, Barbara J. Keller, Joshua J. Millspaugh, Gary C. Brundige
Bed Site Selection Of Fawn Pronghorn In Custer State Park, South Dakota, Chad P. Lehman, Jamin D. Hartland, Barbara J. Keller, Joshua J. Millspaugh, Gary C. Brundige
The Prairie Naturalist
We evaluated pronghorn (Antilocapra americana) fawn bedding site characteristics on a prairie and ponderosa pine (Pinus ponderosa) landscape interface in Custer State Park, South Dakota. We radio-marked 16 adult female pronghorn and collected bed site information from their fawns during 2007~2008. We compared bed site selection with random sites (n = 74) during 2 periods; the early hiding phase when fawns were 1 ~28 days of age (n = 23 bed sites) and the later group phase when fawns were 29~60 days of age (n = 52 bed sites). During the hiding phase fawns selected dry …
A Partial Inventory Of Islands In North Dakota: Potential For Breeding Waterfowl Management, Michael L. Szymanski
A Partial Inventory Of Islands In North Dakota: Potential For Breeding Waterfowl Management, Michael L. Szymanski
The Prairie Naturalist
Islands can provide secure nesting habitat for ducks and other waterbirds, especially in agriculturally dominated landscapes. I inventoried natural and man-made islands in the portion of North Dakota covered by the Prairie Pothole Joint Venture (PPJV). I mapped 1,305 islands in this area; up to 46% of which could provide enhanced nest success with management (e.g., predator removal or establishment of brushy cover). Management of islands for breeding ducks may be an important method for achieving desired reproductive rates in the PP JV as substantial areas of perennial grass cover are lost from federal conservation programs, primarily the Conservation Reserve …
Long Distance Molt Migration By A Giant Canada Goose From Eastern South Dakota, Bobby J. Anderson, Charles D. Dieter
Long Distance Molt Migration By A Giant Canada Goose From Eastern South Dakota, Bobby J. Anderson, Charles D. Dieter
The Prairie Naturalist
To reduce crop damage by resident giant Canada geese (Schaible et al. 2005), the South Dakota Department of Game, Fish and Parks (SDGFP) initiated a program to reduce goose nesting success in eastern South Dakota. One management tool used by SDGFP personnel was the destruction of giant Canada goose nests. When a giant Canada goose has its nest destroyed, they are known to initiate a molt migration (Mykut 2002, Luukkonen et aI. 2008). We attached Platform Transmitting Terminals (PTT; model ST -19) to document and describe molt migrations of giant Canada geese following nest destruction. We captured 3 adult nesting …
Detection And Measurement Of Water Stress In Vegetation Using Visible Spectrum Reflectance, Arthur Zygielbaum
Detection And Measurement Of Water Stress In Vegetation Using Visible Spectrum Reflectance, Arthur Zygielbaum
Department of Geography: Dissertations, Theses, and Student Research
At any scale, from a single microbe to the planet that nurtures us, water defines our place in the universe. It provides the hydraulic forces needed to give plants structure, and the medium enabling photosynthesis, the basis for most life on Earth, to occur. Knowledge of plant water status is vital to understanding the state or condition of vegetation, information which is essential to disciplines as diverse as agriculture, geography, and climatology. Non-destructive and remote sensing of plant water status allows the gathering of such information across wide geographic extents and over long periods of time. Monitoring vegetation remotely requires …
Nebline, Nov./Dec. 2009
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Middle School Youth on a “Nutrition Mission”
Roasts – Easy to Make for the Holidays and Any Other Time, Too!
Family & Community Education (FCE) Clubs: Presidents’ Notes—Bonnie’s Bits
FCE News & Events
Household Hints: Get a Handle on Holiday Cleaning
Radon—A Health Hazard
Computer Cleaning—Hotspots for Germs
Flexible Cash Lease Provisions
Thistle Control Still Possible This Fall — but Hurry
Use Season-Long Records to Assess Pumping Plant Performance
Diversity is the Key to Attracting Wildlife
Provide Basic Needs to Attract Birds
Relocating Problem Wild Animals: Not as Humane as Most People Think
Evergreen Colors for Winter
Fall Vegetable Garden …
Ribosomal Protein L10 Is Encoded In The Mitochondrial Genome Of Many Land Plants And Green Algae, Jeffrey P. Mower, Linda Bonen
Ribosomal Protein L10 Is Encoded In The Mitochondrial Genome Of Many Land Plants And Green Algae, Jeffrey P. Mower, Linda Bonen
Center for Plant Science Innovation: Faculty and Staff Publications
Background: The mitochondrial genomes of plants generally encode 30-40 identified protein-coding genes and a large number of lineage-specific ORFs. The lack of wide conservation for most ORFs suggests they are unlikely to be functional. However, an ORF, termed orf-bryo1, was recently found to be conserved among bryophytes suggesting that it might indeed encode a functional mitochondrial protein.
Results: From a broad survey of land plants, we have found that the orf-bryo1 gene is also conserved in the mitochondria of vascular plants and charophycean green algae. This gene is actively transcribed and RNA edited in many flowering plants. Comparative sequence …
Nebline, October 2009
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Extension Helps Establish a Garden at City Mission
Nutrition Classes Focus on Produce from Garden
How to Reduce Energy Cost for Grain Drying
Tree Planting for Success
Successful Composting
$tretch Your Food Dollar by Making Your Own Mixes
Slow Cookers and Food Safety
Family & Community Education (FCE) Clubs: Presidents’ View—Bonnie’s Bits
FCE News & Events
Household Hints: End-of-Summer Cleanup
10 Tips for Parent-Teacher Conferences
Drying Gourds
Growing American Bittersweet
Storing Vegetables
Praying Mantids: Garden Carnivores
Problem Squirrels in Buildings
October's Heart of 4-H Award Winner: Jennifer Cusick-Rawlinson
Nebraska State Fair 4-H Results
Free Speech: UNL Speakers Bureau in 15th …
Wheat (Triticum Aestivum) Nam Proteins Regulate The Translocation Of Iron, Zinc, And Nitrogen Compounds From Vegetative Tissues To Grain, Brian M. Waters, Cristobal Uauy, Jorge Dubcovsky, Michael A. Grusak
Wheat (Triticum Aestivum) Nam Proteins Regulate The Translocation Of Iron, Zinc, And Nitrogen Compounds From Vegetative Tissues To Grain, Brian M. Waters, Cristobal Uauy, Jorge Dubcovsky, Michael A. Grusak
Department of Agronomy and Horticulture: Faculty Publications
The NAM-B1 gene is a NAC transcription factor that affects grain nutrient concentrations in wheat (Triticum aestivum). An RNAi line with reduced expression of NAM genes has lower grain protein, iron (Fe), and zinc (Zn) concentrations. To determine whether decreased remobilization, lower plant uptake, or decreased partitioning to grain are responsible for this phenotype, mineral dynamics were quantified in wheat tissues throughout grain development. Control and RNAi wheat were grown in potting mix and hydroponics. Mineral (Ca, Cu, Fe, K, Mg, Mn, P, S, and Zn) and nitrogen (N) contents of organs were determined at regular intervals to …
Prediction Of Antigenic Epitopes On Protein Surfaces By Consensus Scoring, Shide Liang, Dandan Zheng, Chi Zhang, Martin Zacharias
Prediction Of Antigenic Epitopes On Protein Surfaces By Consensus Scoring, Shide Liang, Dandan Zheng, Chi Zhang, Martin Zacharias
Center for Plant Science Innovation: Faculty and Staff Publications
Background: Prediction of antigenic epitopes on protein surfaces is important for vaccine design. Most existing epitope prediction methods focus on protein sequences to predict continuous epitopes linear in sequence. Only a few structure-based epitope prediction algorithms are available and they have not yet shown satisfying performance.
Results: We present a new antigen Epitope Prediction method, which uses ConsEnsus Scoring (EPCES) from six different scoring functions - residue epitope propensity, conservation score, sidechain energy score, contact number, surface planarity score, and secondary structure composition. Applied to unbounded antigen structures from an independent test set, EPCES was able to predict antigenic eptitopes …
The Prairie Naturalist. Volume 41, No. 3/4, September/December 2009, The Great Plains Natural Science Society
The Prairie Naturalist. Volume 41, No. 3/4, September/December 2009, The Great Plains Natural Science Society
The Prairie Naturalist
THE PRAIRIE NATURALIST MANUSCRIPT SUBMISSION GUIDELINES. C. N. Jacques, T. W. Grovenburg, and J. A. Jenks
A PARTIAL INVENTORY OF ISLANDS IN NORTH DAKOTA: POTENTIAL FOR BREEDING WATERFOWL MANAGEMENT. M. L. Szymanski
BED SITE SELECTION OF FAWN PRONGHORN IN CUSTER STATE PARK, SOUTH DAKOTA. C. P. Lehman, J. D. Hartland, B. J. Keller, J. J. Millspaugh, and G. C. Brundige
PATTERNS OF BISON HAIR USE IN NESTS OF TALL GRASS PRAIRIE BIRDS B. R. Coppedge
MORTALITY OF CRANES (GRUIDAE) ASSOCIATED WITH POWERLINES OVER A MAJOR ROOST ON THE NORTH PLATTE RIVER, NEBRASKA. G. D. Wright, T. J. Smith, R. K. …
Nebline, September 2009
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
September is Preparedness Month
Overseeding Lawns
Water Young Trees to Prevent Winter Damage
Winterizing Your Home
Propagating Plants from Cuttings
Just Like Kids, Head Lice are Back in School
When a Bat Gets Indoors
Eating Locally Grown Foods in the Fall
Get Your Grains
Laundry Tips for Back-to-School Garments and Stains
Parent-Teacher Communication
Family & Community Education (FCE) Clubs: Presidents’ View—Bonnie’s Bits
FCE News & Events
Household Hints: Recognize Symptoms of Stress
Ten Tips for Welcoming Wildlife into Your Landscape
Weedy Vines: Identification and Control
Winter Annual Weeds in Lawn
Fall is a Good Time to Control Weeds
September's Heart …
The Majority Of The Type Iii Effector Inventory Of Pseudomonas Syringae Pv. Tomato Dc3000 Can Suppress Plant Immunity, Ming Guo, Fang Tian, Yashitola Wamboldt, James R. Alfano
The Majority Of The Type Iii Effector Inventory Of Pseudomonas Syringae Pv. Tomato Dc3000 Can Suppress Plant Immunity, Ming Guo, Fang Tian, Yashitola Wamboldt, James R. Alfano
Center for Plant Science Innovation: Faculty and Staff Publications
The Pseudomonas syringae type III protein secretion system (T3SS) and the type III effectors it injects into plant cells are required for plant pathogenicity and the ability to elicit a hypersensitive response (HR). The HR is a programmed cell death that is associated with effector-triggered immunity (ETI). A primary function of P. syringae type III effectors appears to be the suppression of ETI and pathogen-associated molecular pattern–triggered immunity (PTI), which is induced by conserved molecules on microorganisms. We reported that seven type III effectors from P. syringae pv. tomato DC3000 were capable of suppressing an HR induced by P. fluorescens …
Biofuels: Cultivating Energy, Not Invasive Species, Invasive Species Advisory Committee
Biofuels: Cultivating Energy, Not Invasive Species, Invasive Species Advisory Committee
National Invasive Species Council
Biofuels: Cultivating Energy, not Invasive Species, approved by ISAC on August 11, 2009
ISSUE
To provide alternatives to petroleum-based energy, the United States government has mandated a greater proportion of plant-based biofuels be integrated into its energy portfolio. However, certain plant species being proposed for biofuel production in the United States are invasive species or are likely to escape cultivation and become invasive. United States Executive Order (EO) 131121 defines invasive species as “alien [non-native] species whose introduction does or is likely to cause economic or environmental harm or harm to human health” and states: “Each Federal agency whose actions …
Experiencia De Productoras Con El Uso De Harina De Sorgo: Por Años El Cultivo Del Sorgo Ha Sido Utilizado Para El Consumo Humano Y Animal, Roxana Ortiz, Eduardo Funes
Experiencia De Productoras Con El Uso De Harina De Sorgo: Por Años El Cultivo Del Sorgo Ha Sido Utilizado Para El Consumo Humano Y Animal, Roxana Ortiz, Eduardo Funes
INTSORMIL Impacts and Bulletins
En marzo del año pasado, la industria panifi cadora experimento los precios altos que sufrió la harina de trigo y en la búsqueda de nuevas alternativas algunos de ellos se interesaron en el uso de harina de sorgo para elaborar pan dulce y bebidas étnicas.
Es así que el Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA) a través del Laboratorio de Alimentos impulsa esta tecnología. El interés de probar nuevas opciones llevo a muchas Panaderías, Asociaciones de Productoras, ONG, Industrias de Alimentos, Fundaciones y otras a capacitarse en el uso de esta harina.
Triticum Mosaic Virus: A Distinct Member Of The Family Potyviridae With An Unusually Long Leader Sequence, Satyanarayana Tatineni, Amy D. Ziems, Stephen N. Wegulo, Roy French
Triticum Mosaic Virus: A Distinct Member Of The Family Potyviridae With An Unusually Long Leader Sequence, Satyanarayana Tatineni, Amy D. Ziems, Stephen N. Wegulo, Roy French
Department of Plant Pathology: Faculty Publications
The complete genome sequence of Triticum mosaic virus (TriMV), a member in the family Potyviridae, has been determined to be 10,266 nucleotides (nt) excluding the 3′ polyadenylated tail. The genome encodes a large polyprotein of 3,112 amino acids with the “hall-mark proteins” of potyviruses, including a small overlapping gene, PIPO, in the P3 cistron. The genome of TriMV has an unusually long 5′ nontranslated region of 739 nt with 12 translation initiation codons and three small open reading frames, which resemble those of the internal ribosome entry site containing 5′ leader sequences of the members of Picornaviridae. Pairwise …
Effect Of Growth Stage On The Relationship Between Tan Spot And Spot Blotch Severity And Yield In Winter Wheat, Stephen N. Wegulo, Julie A. Breathnach, P. Stephen Baenziger
Effect Of Growth Stage On The Relationship Between Tan Spot And Spot Blotch Severity And Yield In Winter Wheat, Stephen N. Wegulo, Julie A. Breathnach, P. Stephen Baenziger
Department of Plant Pathology: Faculty Publications
Foliar fungal diseases frequently cause significant economic losses in the hard red winter wheat production areas of the Great Plains of the United States. In 2007, field experiments were conducted in four environments in Nebraska, USA to determine the crop growth stage at which severity of tan spot and spot blotch was most strongly related to yield in winter wheat. Secondary objectives were to evaluate the efficacy of fungicides in controlling tan spot and spot blotch and to determine the effect of fun¬gicide application timing on disease intensity and yield. Disease severity assessed at Zadoks growth stage (ZGS) 60 (flower¬ing) …
An Integrated Crop- And Soil-Based Strategy For Variable-Rate Nitrogen Management In Corn, Darrin F. Roberts
An Integrated Crop- And Soil-Based Strategy For Variable-Rate Nitrogen Management In Corn, Darrin F. Roberts
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Nitrogen (N) management in cereal crops has been the subject of considerable research and debate for several decades. Historic N management practices have contributed to low nitrogen use efficiency (NUE). Low NUE can be caused by such things as poor synchronization between soil N supply and crop demand, uniform application rates of fertilizer N to spatially variable landscapes, and failure to account for temporally variable influences on soil N supply and crop N need. Active canopy reflectance sensors and management zones (MZ) have been studied separately as possible plant- and soil-based N management tools to increase NUE. Recently, some have …
Nebline, August 2009
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Landscape Water Saving Methods
Natural Sources of Nitrogen for Plant Growth
Commercial Nitrogen Fertilizer Sources
Pumping Water For Ponds
Canning Fruits and Vegetables
Heating With Wood
Fall Prairie Seeding Site Preparation
Handling Food Safely on the Road $tretch Your Food Dollar by Packing Your Lunch Family & Community Education (FCE) Clubs: Presidents’ View—Bonnie’s Bits
FCE News & Events
Household Hints
Financial Security: Consumer Credit
Running Out of Time for Bagworm Control
Harvesting and Preserving Herbs
Summertime Bug Bites
Taking Insect Photos at Spring Creek Prairie
4-H’ers Test Animal Science Skills at PASE
4-H’ers Test Family and Consumer Sciences Skills at …
Switchgrass For Forage And Bioenergy: Ii. Effects Of P And K Fertilization, John A. Guretzky, Maru Kering, Jon Biermacher, Billy Cook
Switchgrass For Forage And Bioenergy: Ii. Effects Of P And K Fertilization, John A. Guretzky, Maru Kering, Jon Biermacher, Billy Cook
Department of Agronomy and Horticulture: Faculty Publications
Switchgrass (Panicum virgatum L.) has been targeted for cellulosic ethanol production. Our objective was to evaluate effects of P and K fertilization on switchgrass biomass yields. Experiments were established in switchgrass (cv. Alamo) fields planted at three Oklahoma locations in 2007. Interactions of N and P fertilizer rates were evaluated on two sites that had low soil test P (6 to 9 kg/ha). Interactions of N and K fertilizer rates and harvest system were evaluated on a site that had low soil test K (134 kg/ha). In the N and P rate experiments, biomass yields during establishment …
Effects Of Nitrogen Supply On The Root Morphology Of Corn And Velvetleaf, Kimberly D. Bonifas, John L. Lindquist
Effects Of Nitrogen Supply On The Root Morphology Of Corn And Velvetleaf, Kimberly D. Bonifas, John L. Lindquist
Department of Agronomy and Horticulture: Faculty Publications
Root morphology will affect interplant competition for soil nutrients. Research was conducted to assess fine root fraction, mean root radius, specific root length, root length density, and nitrogen (N) uptake per unit fine root biomass of corn and velvetleaf over time and in response to nitrogen supply. Pots containing either corn or velvetleaf were embedded in the ground and received one of three N treatments. Plants were destructively sampled on 10 dates during each of two years and root subsamples analyzed using root scanning software. While corn root morphology was more responsive to N supply than velvetleaf, velvetleaf N uptake …
A Preliminary Analysis Of The Effects Of Hr 2454 On U.S. Agriculture, Economic Research Service
A Preliminary Analysis Of The Effects Of Hr 2454 On U.S. Agriculture, Economic Research Service
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
USDA performed a preliminary economic analysis of the impacts of House-passed climate legislation, HR 2454, on U.S. agriculture. The analysis assumes no technological change, no alteration of inputs in agriculture, and no increase in demand for bio-energy as a result of higher energy prices. Therefore, it overstates the impact of the climate legislation on agriculture costs in the short (2012-18), medium (2027-2033), and long-term (2042 to 2048). In USDA’s analysis, short-term costs remain low in part because of provisions in HR 2454 that reduce the impacts of the bill on fertilizer costs. In fact, the impact on net farm income …
An Icosahedral Algal Virus Has A Complex Unique Vertex Decorated By A Spike, Mickaël V. Cherrier, Victor A. Kostyuchenko, Chuan Xiao, Valorie D. Bowman, Anthony J. Battisti, Xiaodong Yan, Paul R. Chipman, Timothy S. Baker, James L. Van Etten, Michael G. Rossmann
An Icosahedral Algal Virus Has A Complex Unique Vertex Decorated By A Spike, Mickaël V. Cherrier, Victor A. Kostyuchenko, Chuan Xiao, Valorie D. Bowman, Anthony J. Battisti, Xiaodong Yan, Paul R. Chipman, Timothy S. Baker, James L. Van Etten, Michael G. Rossmann
Department of Plant Pathology: Faculty Publications
Paramecium bursaria Chlorella virus-1 is an icosahedrally shaped, 1,900-Å-diameter virus that infects unicellular eukaryotic green algae. A 5-fold symmetric, 3D reconstruction using cryoelectron microscopy images has now shown that the quasiicosahedral virus has a unique vertex, with a pocket on the inside and a spike structure on the outside of the capsid. The pocket might contain enzymes for use in the initial stages of infection. The unique vertex consists of virally coded proteins, some of which have been identified. Comparison of shape, size, and location of the spike with similar features in bacteriophages T4 and P22 suggests that the spike …
Functional Characterization Of The Arabidopsis Β-Ketoacyl-Coenzyme A Reductase Candidates Of The Fatty Acid Elongase, Frédéric Beaudoin, Xianzhong Wu, Fengling Li, Richard P. Haslam, Jennifer E. Markham, Huanquan Zheng, Johnathan A. Napier, Ljerka Kunst
Functional Characterization Of The Arabidopsis Β-Ketoacyl-Coenzyme A Reductase Candidates Of The Fatty Acid Elongase, Frédéric Beaudoin, Xianzhong Wu, Fengling Li, Richard P. Haslam, Jennifer E. Markham, Huanquan Zheng, Johnathan A. Napier, Ljerka Kunst
Department of Biochemistry: Faculty Publications
In plants, very-long-chain fatty acids (VLCFAs; >18 carbon) are precursors of sphingolipids, triacylglycerols, cuticular waxes, and suberin. VLCFAs are synthesized by a multiprotein membrane-bound fatty acid elongation system that catalyzes four successive enzymatic reactions: condensation, reduction, dehydration, and a second reduction. A bioinformatics survey of the Arabidopsis (Arabidopsis thaliana) genome has revealed two sequences homologous to YBR159w encoding a Saccharomyces cerevisiae β-ketoacyl reductase (KCR), which catalyzes the first reduction during VLCFA elongation. Expression analyses showed that both AtKCR1 and AtKCR2 genes were transcribed in siliques, flowers, inflorescence stems, leaves, as well as developing embryos, but only AtKCR1 …