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Articles 5881 - 5910 of 13619
Full-Text Articles in Entire DC Network
Weight Gain Reveals Dramatic Increases In Skeletal Muscle Extracellular Matrix Remodeling, Charmaine S. Tam, Jeffrey D. Covington, Sudip Bajpeyi, Yourka Tchoukalova, David Burk, Darcy L. Johannsen, Cristina M. Zingaretti, Saverio Cinti, Eric Ravussin
Weight Gain Reveals Dramatic Increases In Skeletal Muscle Extracellular Matrix Remodeling, Charmaine S. Tam, Jeffrey D. Covington, Sudip Bajpeyi, Yourka Tchoukalova, David Burk, Darcy L. Johannsen, Cristina M. Zingaretti, Saverio Cinti, Eric Ravussin
Faculty Publications
Context: In animal models of obesity, chronic inflammation and dysregulated extracellular matrix remodeling in adipose tissue leads to insulin resistance. Whether similar pathophysiology occurs in humans is not clear. Objective: The aim of this study was to test whether 10% weight gain induced by overfeeding triggers inflammation and extracellular matrix remodeling (gene expression, protein, histology) in skeletal muscleandsc adipose tissue in humans.Wealso investigated whether such remodelingwas associated with an impaired metabolic response (hyperinsulinemic-euglycemic clamp). Design, Setting, Participants, and Intervention: Twenty-nine free-living males were fed 40% over their baseline energy requirements for 8 weeks. Results: Ten percent body weight gain prompted …
Environmental Influences On Maize-Aspergillus Flavus Interactions And Aflatoxin Production, Jake C. Fountain, Brian T. Scully, Xinzhi Ni, Robert C. Kemerait, Robert D. Lee, Zhi Yuan Chen, Baozhu Guo
Environmental Influences On Maize-Aspergillus Flavus Interactions And Aflatoxin Production, Jake C. Fountain, Brian T. Scully, Xinzhi Ni, Robert C. Kemerait, Robert D. Lee, Zhi Yuan Chen, Baozhu Guo
Faculty Publications
Since the early 1960s, the fungal pathogen Aspergillus flavus (Link ex Fr.) has been the focus of intensive research due to the production of carcinogenic and highly toxic secondary metabolites collectively known as aflatoxins following pre-harvest colonization of crops. Given this recurrent problem and the occurrence of a severe aflatoxin outbreak in maize (Zea mays L.), particularly in the Southeast U.S. in the 1977 growing season, a significant research effort has been put forth to determine the nature of the interaction occurring between aflatoxin production, A. flavus, environment and its various hosts before harvest. Many studies have investigated this interaction …
Stylet Penetration Behaviors Of Myzus Persicae (Hemiptera: Aphididae) On Four Ipomoea Spp. Infected Or Noninfected With Sweet Potato Potyviruses, E. N. Wosula, J. A. Davis, C. A. Clark
Stylet Penetration Behaviors Of Myzus Persicae (Hemiptera: Aphididae) On Four Ipomoea Spp. Infected Or Noninfected With Sweet Potato Potyviruses, E. N. Wosula, J. A. Davis, C. A. Clark
Faculty Publications
Myzus persicae (Sulzer) is an efficient vector of potyviruses in sweet potato, Ipomoea batatas (L.). These potyviruses also infect members of the morning glory family Ipomoea cordatotriloba Dennstedt and Ipomoea hederacea Jacqin commonly found within or around sweet potato fields. Infection of sweet potato with potyviruses increases the intrinsic rate of increase of M. persicae. Thus, from the epidemiological stand point, virus infection can modify vector population dynamics, and therefore increase virus spread. To better understand this, stylet penetration behaviors of M. persicae on virus infected and noninfected sweet potato cvs. 'Beauregard' and 'Evangeline', as well as morning glory plants …
Functional Characterization Of Chemosensory Proteins In The Scarab Beetle, Holotrichia Oblita Faldermann (Coleoptera: Scarabaeida), Hongyan Sun, Li Guan, Honglin Feng, Jiao Yin, Yazhong Cao, Jinghui Xi, Kebin Li
Functional Characterization Of Chemosensory Proteins In The Scarab Beetle, Holotrichia Oblita Faldermann (Coleoptera: Scarabaeida), Hongyan Sun, Li Guan, Honglin Feng, Jiao Yin, Yazhong Cao, Jinghui Xi, Kebin Li
Faculty Publications
Chemosensory proteins (CSPs) play important roles in chemical communication by insects, as they recognize and transport environmental chemical signals to receptors within sensilla. In this study, we identified HoblCSP1 and HoblCSP2 from a cDNA library of Holotrichia oblita antennae, successfully expressed them in E. coli and purified them by Ni ion affinity chromatography. We then measured the ligand-binding specificities of HoblCSP1 and Hobl CSP2 to 50 selected ligands in a competitive binding assay. These results demonstrated that HoblCSP1 and HoblCSP2 have similar ligand-binding spectra. Both proteins displayed the highest affinity for β-ionone, α-ionone and cinnamaldehyde, indicating that they prefer binding …
Potential Use Of An Essential Oil From The Flower Of Swertia Densifolia As A Repellent For Apis Florea (Hymenoptera: Apidae), D. G. Naik, H. Vaidya-Kannur, P. V. Deshpande, C. N. Dandge, G. V.P. Reddy
Potential Use Of An Essential Oil From The Flower Of Swertia Densifolia As A Repellent For Apis Florea (Hymenoptera: Apidae), D. G. Naik, H. Vaidya-Kannur, P. V. Deshpande, C. N. Dandge, G. V.P. Reddy
Faculty Publications
ABSTRACT Formulations of compounds repellent to honey bees may be useful tools to keep bees away from areas recently treated with toxic insecticides. Here, we report the activity of a previously unknown honey bee repellent, an essential oil from the flower of Swertia densifolia (Gentianaceae), which has activity toward Indian honey bees Apis florea F. The essential oil was obtained by hydrodistillation and was subjected to a rotating table bioassay with foragers of the honey bee A. florea. Repellency was dose-dependent up to 12 mg/ml and remained constant thereafter. The chemical constitution of the essential oil was examined by gas …
Efficacy Of Pheromone Trapping Of The Sweetpotato Weevil (Coleoptera: Brentidae): Based On Dose, Septum Age, Attractive Radius, And Mass Trapping, Gadi V.P. Reddy, Shaohui Wu, Robert C. Mendi, Ross H. Miller
Efficacy Of Pheromone Trapping Of The Sweetpotato Weevil (Coleoptera: Brentidae): Based On Dose, Septum Age, Attractive Radius, And Mass Trapping, Gadi V.P. Reddy, Shaohui Wu, Robert C. Mendi, Ross H. Miller
Faculty Publications
Pheromone dose, effective trapping distance, and longevity of the rubber septa loaded with sex pheromone of Cylas formicarius (F.) (Coleoptera: Brentidae) were evaluated for their impact on the efficacy of mass trapping of the insect in sweet potato fields in Guam in 2012-2013. The number of adults caught at different distances (10-100 m) was significantly different. Catches declined with increasing release distance from the trap in both downwind and upwind directions. While the maximum radius of attraction of pheromone-baited trap for C. formicarius in the field was 80 m, the effective distance for recapturing marked adults in the pheromone-baited Unitraps …
Sustainable Management Tactics For Control Of Phyllotreta Cruciferae (Coleoptera: Chrysomelidae) On Canola In Montana, Gadi V.P. Reddy, Khanobporn Tangtrakulwanich, Shaohui Wu, John H. Miller, Victoria L. Ophus, Julie Prewett
Sustainable Management Tactics For Control Of Phyllotreta Cruciferae (Coleoptera: Chrysomelidae) On Canola In Montana, Gadi V.P. Reddy, Khanobporn Tangtrakulwanich, Shaohui Wu, John H. Miller, Victoria L. Ophus, Julie Prewett
Faculty Publications
The crucifer flea beetle, Phyllotreta cruciferae (Goeze) (Coleoptera: Chrysomelidae), has recently emerged as a serious pest of canola (Brassica napus L.) in Montana. The adult beetles feed on canola leaves, causing many small holes that stunt growth and reduce yield. In 2013, damage to canola seedlings was high (≈80%) in many parts of Montana, evidence that when flea beetles emerge in large numbers, they can quickly destroy a young canola crop. In the current study, the effectiveness of several biopesticides was evaluated and compared with two insecticides (deltamethrin and bifenthrin) commonly used as foliar sprays as well as seed treatment …
Field Evaluation Of Petroleum Spray Oil And Carbaryl Against Tetranychus Marianae (Acari: Tetranichidae) On Eggplant, Gadi V.P. Reddy, Ross H. Miller
Field Evaluation Of Petroleum Spray Oil And Carbaryl Against Tetranychus Marianae (Acari: Tetranichidae) On Eggplant, Gadi V.P. Reddy, Ross H. Miller
Faculty Publications
Tetranychus marianae McGregor (Acari: Tetranychidae) is a pest of several perennial crops and is widespread in the Pacific Basin, including the Mariana Islands where it was first reported. The mite is also present in the West Indies, Bahamas, southern USA, Nicaragua, Argentina, Brazil and Southeast Asia. Eggplant growers apply carbaryl 10 to 15 times against this pest during each cropping period. Some growers no longer cultivate eggplant and tomato because of uncontrollable mite infestations. Previous indoor studies have shown petroleum spray oil (PSO) to be effective against T. marianae. We therefore examined the comparative effectiveness of PSO (Sun-spray 6E®) at …
Are Sweetpotato Weevils (Coleoptera: Brentidae) Differentially Attracted To Certain Colors?, Nirupa Gadi, G. V.P. Reddy
Are Sweetpotato Weevils (Coleoptera: Brentidae) Differentially Attracted To Certain Colors?, Nirupa Gadi, G. V.P. Reddy
Faculty Publications
The sweetpotato weevil Cylas formicarius (F.) (Coleoptera: Brentidae) is one of the most serious insects causing damage to sweetpotatoes in the world. Small populations of these insects can cause severe damage to tubers of the crop. Without proper and effective control, weevil populations are likely to cause a huge or complete loss of sweetpotato production in sweetpotato growing areas. Consequently, there is an urgent need for development of an eco-friendly control method for this weevil. Although some control methods are effective, toxic pesticides applications are detrimental and damaging to our environment. Although pheromone traps are currently being used, no effective …
Components, Volume 10 (2014), Lsu Center For Computation And Technology
Components, Volume 10 (2014), Lsu Center For Computation And Technology
Components
No abstract provided.
2014 Annual Report, Louisiana Rice Research Board, Lsu Agcenter
2014 Annual Report, Louisiana Rice Research Board, Lsu Agcenter
Louisiana Rice Research Board Annual Report
No abstract provided.
Vitamin D Levels Are Low In Adult Patients With Sickle Cell Disease In Jamaica And West Africa, Bamidele O. Tayo, Titilola S. Akingbola, Babatunde L. Salako, Colin A. Mckenzie, Marvin Reid, Jennifer Layden, Ifeyinwa Osunkwo, Jacob Plange-Rhule, Amy Luke, Ramon Durazo-Arvizu, Richard S. Cooper
Vitamin D Levels Are Low In Adult Patients With Sickle Cell Disease In Jamaica And West Africa, Bamidele O. Tayo, Titilola S. Akingbola, Babatunde L. Salako, Colin A. Mckenzie, Marvin Reid, Jennifer Layden, Ifeyinwa Osunkwo, Jacob Plange-Rhule, Amy Luke, Ramon Durazo-Arvizu, Richard S. Cooper
Faculty Publications
Background: Patients with sickle cell disease in the USA have been noted to have lower levels of vitamin D – measured as 25-hydroxyvitamin D (25(OH)D) – compared to controls. Average serum 25(OH)D levels are also substantially lower in African Americans than whites, while population distributions of 25(OH)D among Jamaicans of African descent and West Africans are the same as among USA whites. The purpose of this study was to examine whether adult patients with sickle cell disease living in tropical regions had reduced 25(OH)D relative to the general population. Methods: We analyzed serum 25(OH)D in stored samples collected from studies …
Distribution Of Metals Exposure And Associations With Cardiometabolic Risk Factors In The "Modeling The Epidemiologic Transition Study", Adrienne S. Ettinger, Pascal Bovet, Jacob Plange-Rhule, Terrence E. Forrester, Estelle V. Lambert, Nicola Lupoli, James Shine, Lara R. Dugas, David Shoham, Ramon A. Durazo-Arvizu, Richard S. Cooper, Amy Luke
Distribution Of Metals Exposure And Associations With Cardiometabolic Risk Factors In The "Modeling The Epidemiologic Transition Study", Adrienne S. Ettinger, Pascal Bovet, Jacob Plange-Rhule, Terrence E. Forrester, Estelle V. Lambert, Nicola Lupoli, James Shine, Lara R. Dugas, David Shoham, Ramon A. Durazo-Arvizu, Richard S. Cooper, Amy Luke
Faculty Publications
Background: Metals are known endocrine disruptors and have been linked to cardiometabolic diseases via multiple potential mechanisms, yet few human studies have both the exposure variability and biologically-relevant phenotype data available. We sought to examine the distribution of metals exposure and potential associations with cardiometabolic risk factors in the "Modeling the Epidemiologic Transition Study" (METS), a prospective cohort study designed to assess energy balance and change in body weight, diabetes and cardiovascular disease risk in five countries at different stages of social and economic development. Methods: Young adults (25-45 years) of African descent were enrolled (N = 500 from each …
Research Capacity. Enabling The Genomic Revolution In Africa, Charles Rotimi, Akin Abayomi, Alash'le Abimiku, Victoria May Adabayeri, Clement Adebamowo, Ezekiel Adebiyi, Adebowale D. Ademola, Adebowale Adeyemo, Dwomoa Adu, Dissou Affolabi, Godfred Agongo, Samuel Ajayi, Sally Akarolo-Anthony, Rufus Akinyemi, Albert Akpalu, Marianne Alberts, Orlando Alonso Betancourt, Ahmed Mansour Alzohairy, Gobena Ameni, Olukemi Amodu, Gabriel Anabwani, Kristian G. Andersen, Fatiu Arogundade, Oyedunni Arulogun, Danny A. Asogun, Rasheed Bakare, Naby Balde, Mary Lynn Baniecki, Christine Beiswanger, Alia Benkahla, Lara Bethke, Micheal Boehnke, Vincent Boima
Research Capacity. Enabling The Genomic Revolution In Africa, Charles Rotimi, Akin Abayomi, Alash'le Abimiku, Victoria May Adabayeri, Clement Adebamowo, Ezekiel Adebiyi, Adebowale D. Ademola, Adebowale Adeyemo, Dwomoa Adu, Dissou Affolabi, Godfred Agongo, Samuel Ajayi, Sally Akarolo-Anthony, Rufus Akinyemi, Albert Akpalu, Marianne Alberts, Orlando Alonso Betancourt, Ahmed Mansour Alzohairy, Gobena Ameni, Olukemi Amodu, Gabriel Anabwani, Kristian G. Andersen, Fatiu Arogundade, Oyedunni Arulogun, Danny A. Asogun, Rasheed Bakare, Naby Balde, Mary Lynn Baniecki, Christine Beiswanger, Alia Benkahla, Lara Bethke, Micheal Boehnke, Vincent Boima
Faculty Publications
No abstract provided.
The Dangers Of Unlimited Access: Fiction, The Internet And The Social Construction Of Childhood., Suzanne Marie Stauffer
The Dangers Of Unlimited Access: Fiction, The Internet And The Social Construction Of Childhood., Suzanne Marie Stauffer
Faculty Publications
At the beginning of the twentieth century, librarians, teachers, and parentswrote about the dangers to children of unlimited access towhatwas termed “sensational literature.” At the beginning of the next century, they struggled to deal with the dangers to children of unlimited access to the Internet. Although separated by a hundred years, they appear to be makingmuch the same argument about themuch the same issue, that of the public library providing unlimited access tominors towhat some viewas inappropriate or dangerousmaterials. However, a closer analysis of the discourse in the professional media regarding these two controversies, one that investigates the mechanisms underlying …
Lsu General Catalog 2014-2015, Louisiana State University And Agricultural And Mechanical College
Lsu General Catalog 2014-2015, Louisiana State University And Agricultural And Mechanical College
LSU General Catalog
The LSU General Catalog describes all undergraduate and graduate departments and programs with degree requirements and courses offered for each one. The LSU General Catalog includes information on registration and financial aid as well as academic services offered to all students.
Lethal And Sublethal Effects Of Lufenuron On The Formosan Subterranean Termite (Isoptera: Rhinotermitidae), Cai Wang, Gregg Henderson, Bal K. Gautam, Xuan Chen
Lethal And Sublethal Effects Of Lufenuron On The Formosan Subterranean Termite (Isoptera: Rhinotermitidae), Cai Wang, Gregg Henderson, Bal K. Gautam, Xuan Chen
Faculty Publications
A laboratory study was conducted to understand the effect of low concentrations of lufenuron on termite physiology and behavior. Survivorship, running speed, body water content, food consumption, tunneling, microbial infection, and two behavioral patterns (carcass-burying behavior and particle transport behavior) were compared among Formosan subterranean termites, Coptotermes formosanus Shiraki, fed lufenuron-treated (250, 500, or 1,000 ppm) or untreated (control) filter paper. In 30-32 d, all lufenuron treatments significantly reduced survivorship, running speed, consumption, and tunneling, but had no substantial effect on body water content. In addition, termites fed the three concentrations of lufenuron became infected by opportunistic pathogens. Carcass-burying and …
Comparative Evaluation Of Three Chitin Synthesis Inhibitor Termite Baits Using Multiple Bioassay Designs, Bal Krishna Gautam, Gregg Henderson
Comparative Evaluation Of Three Chitin Synthesis Inhibitor Termite Baits Using Multiple Bioassay Designs, Bal Krishna Gautam, Gregg Henderson
Faculty Publications
Use of chitin synthesis inhibitors has revolutionized the potential impact of termite baiting systems. Several chitin synthesis inhibitors have been used or tested against subterranean termites. We evaluated the effect of lufenuron on bait matrix consumption and mortality of Coptotermes formosanus and compared it with 2 other chitin synthesis inhibitors presently used for termite control: diflubenzuron and noviflumuron. Laboratory no-choice and multi-chamber bioassay designs were employed. At the end of 6 weeks, in both the no-choice and multi-chamber tests, mortality was significantly higher in all the chitin synthesis inhibitor treatments as compared to the controls; however, lufenuron treatment had significantly …
The Common Marmoset Genome Provides Insight Into Primate Biology And Evolution, Kim C. Worley, Wesley C. Warren, Jeffrey Rogers, Devin Locke, Donna M. Muzny, Elaine R. Mardis, George M. Weinstock, Suzette D. Tardif, Kjersti M. Aagaard, Nicoletta Archidiacono, Nirmala Arul Rayan, Mark A. Batzer, Kathryn Beal, Brona Brejova, Oronzo Capozzi, Saverio B. Capuano, Claudio Casola, Mimi M. Chandrabose, Andrew Cree, Marvin Diep Dao, Pieter J. De Jong, Ricardo Cruz-Herrera Del Rosario, Kim D. Delehaunty, Huyen H. Dinh, Evan E. Eichler, Stephen Fitzgerald, Paul Flicek, Catherine C. Fontenot, R. Gerald Fowler, Catrina Fronick, Lucinda A. Fulton, Robert S. Fulton, Ramatu Ayiesha Gabisi, Daniel Gerlach
The Common Marmoset Genome Provides Insight Into Primate Biology And Evolution, Kim C. Worley, Wesley C. Warren, Jeffrey Rogers, Devin Locke, Donna M. Muzny, Elaine R. Mardis, George M. Weinstock, Suzette D. Tardif, Kjersti M. Aagaard, Nicoletta Archidiacono, Nirmala Arul Rayan, Mark A. Batzer, Kathryn Beal, Brona Brejova, Oronzo Capozzi, Saverio B. Capuano, Claudio Casola, Mimi M. Chandrabose, Andrew Cree, Marvin Diep Dao, Pieter J. De Jong, Ricardo Cruz-Herrera Del Rosario, Kim D. Delehaunty, Huyen H. Dinh, Evan E. Eichler, Stephen Fitzgerald, Paul Flicek, Catherine C. Fontenot, R. Gerald Fowler, Catrina Fronick, Lucinda A. Fulton, Robert S. Fulton, Ramatu Ayiesha Gabisi, Daniel Gerlach
Faculty Publications
We report the whole-genome sequence of the common marmoset (Callithrix jacchus). The 2.26-Gb genome of a female marmoset was assembled using Sanger read data (6×) and a whole-genome shotgun strategy. A first analysis has permitted comparison with the genomes of apes and Old World monkeys and the identification of specific features that might contribute to the unique biology of this diminutive primate, including genetic changes that may influence body size, frequent twinning and chimerism. We observed positive selection in growth hormone/insulin-like growth factor genes (growth pathways), respiratory complex I genes (metabolic pathways), and genes encoding immunobiological factors and proteases (reproductive …
The Psbp Domain Protein 1 Functions In The Assembly Of Lumenal Domains In Photosystem I, Johnna L. Roose, Laurie K. Frankel, Terry M. Bricker
The Psbp Domain Protein 1 Functions In The Assembly Of Lumenal Domains In Photosystem I, Johnna L. Roose, Laurie K. Frankel, Terry M. Bricker
Faculty Publications
Photosystem I (PS I) is a multisubunit membrane protein complex that functions as a light-driven plastocyanin-ferredoxin oxidoreductase. The PsbP domain protein 1 (PPD1; At4g15510) is located in the thylakoid lumen of plant chloroplasts and is essential for photoautotrophy, functioning as a PS I assembly factor. In this work, RNAi was used to suppress PPD1 expression, yielding mutants displaying a range of phenotypes with respect to PS I accumulation and function. These PPD1 RNAi mutants showed a loss of assembled PS I that was correlated with loss of the PPD1 protein. In the most severely affected PPD1 RNAi lines, the accumulated …
Poor Fit To The Multispecies Coalescent Is Widely Detectable In Empirical Data, Noah M. Reid, Sarah M. Hird, Jeremy M. Brown, Tara A. Pelletier, John D. Mcvay, Jordan D. Satler, Bryan C. Carstens
Poor Fit To The Multispecies Coalescent Is Widely Detectable In Empirical Data, Noah M. Reid, Sarah M. Hird, Jeremy M. Brown, Tara A. Pelletier, John D. Mcvay, Jordan D. Satler, Bryan C. Carstens
Faculty Publications
Model checking is a critical part of Bayesian data analysis, yet it remains largely unused in systematic studies. Phylogeny estimation has recently moved into an era of increasingly complex models that simultaneously account for multiple evolutionary processes, the statistical fit of these models to the data has rarely been tested. Here we develop a posterior predictive simulation-based model check for a commonly used multispecies coalescent model, implemented in *BEAST, and apply it to 25 published data sets. We show that poor model fit is detectable in the majority of data sets; that this poor fit can mislead phylogenetic estimation; and …
Predictive Approaches To Assessing The Fit Of Evolutionary Models, Jeremy M. Brown
Predictive Approaches To Assessing The Fit Of Evolutionary Models, Jeremy M. Brown
Faculty Publications
No abstract provided.
Systematics Of The Obligate Ant-Following Clade Of Antbirds (Aves: Passeriformes: Thamnophilidae), Morton L. Isler, Gustavo A. Bravo, Robb T. Brumfield
Systematics Of The Obligate Ant-Following Clade Of Antbirds (Aves: Passeriformes: Thamnophilidae), Morton L. Isler, Gustavo A. Bravo, Robb T. Brumfield
Faculty Publications
© 2014 by the Wilson Ornithological Society. Results of a comprehensive molecular phylogeny of the family Thamnophilidae were consistent with earlier findings that almost all obligate army-ant-followers of the family form a monophyletic group that contains five well-supported clades and encompasses six currently recognized genera: Phaenostictus, Pithys, Willisornis, Gymnopithys, Rhegmatorhina, and Phlegopsis. A comparative analysis of seven suites of morphological, behavioral, and ecological traits within the context of the phylogeny reinforced the validity of five of these genera, but results for the sixth, Gymnopithys, were internally inconsistent and required the description of a new genus, Oneillornis.
Sampling Locality Is More Detectable Than Taxonomy Or Ecology In The Gut Microbiota Of The Brood-Parasitic Brown-Headed Cowbird (Molothrus Ater), Sarah M. Hird, Bryan C. Carstens, Steven W. Cardiff, Donna L. Dittmann, Robb T. Brumfield
Sampling Locality Is More Detectable Than Taxonomy Or Ecology In The Gut Microbiota Of The Brood-Parasitic Brown-Headed Cowbird (Molothrus Ater), Sarah M. Hird, Bryan C. Carstens, Steven W. Cardiff, Donna L. Dittmann, Robb T. Brumfield
Faculty Publications
Brown-headed Cowbirds (Molothrus ater) are the most widespread avian brood parasite in North America, laying their eggs in the nests of approximately 250 host species that raise the cowbird nestlings as their own. It is currently unknown how these heterospecific hosts influence the cowbird gut microbiota relative to other factors, such as the local environment and genetics. We test a Nature Hypothesis (positing the importance of cowbird genetics) and a Nurture Hypothesis (where the host parents are most influential to cowbird gut microbiota) using the V6 region of 16S rRNA as a microbial fingerprint of the gut from 32 cowbird …
Adaptive Processes Drive Ecomorphological Convergent Evolution In Antwrens (Thamnophilidae), Gustavo A. Bravo, J. V. Remsen, Robb T. Brumfield
Adaptive Processes Drive Ecomorphological Convergent Evolution In Antwrens (Thamnophilidae), Gustavo A. Bravo, J. V. Remsen, Robb T. Brumfield
Faculty Publications
© 2014 The Author(s). Phylogenetic niche conservatism (PNC) and convergence are contrasting evolutionary patterns that describe phenotypic similarity across independent lineages. Assessing whether and how adaptive processes give origin to these patterns represent a fundamental step toward understanding phenotypic evolution. Phylogenetic model-based approaches offer the opportunity not only to distinguish between PNC and convergence, but also to determine the extent that adaptive processes explain phenotypic similarity. The Myrmotherula complex in the Neotropical family Thamnophilidae is a polyphyletic group of sexually dimorphic small insectivorous forest birds that are relatively homogeneous in size and shape. Here, we integrate a comprehensive species-level molecular …
Target Capture And Massively Parallel Sequencing Of Ultraconserved Elements For Comparative Studies At Shallow Evolutionary Time Scales, Brian Tilston Smith, Michael G. Harvey, Brant C. Faircloth, Travis C. Glenn, Robb T. Brumfield
Target Capture And Massively Parallel Sequencing Of Ultraconserved Elements For Comparative Studies At Shallow Evolutionary Time Scales, Brian Tilston Smith, Michael G. Harvey, Brant C. Faircloth, Travis C. Glenn, Robb T. Brumfield
Faculty Publications
Comparative genetic studies of non-model organisms are transforming rapidly due to major advances in sequencing technology. A limiting factor in these studies has been the identification and screening of orthologous loci across an evolutionarily distant set of taxa. Here, we evaluate the efficacy of genomic markers targeting ultraconserved DNA elements (UCEs) for analyses at shallow evolutionary timescales. Using sequence capture and massively parallel sequencing to generate UCE data for five co-distributed Neotropical rainforest bird species, we recovered 776-1516 UCE loci across the five species. Across species, 53-77% of the loci were polymorphic, containing between 2.0 and 3.2 variable sites per …
Four New Species Of Coccidia (Apicomplexa: Eimeriidae) From Owen Stanley Skinks, Papuascincus Stanleyanus (Sauria: Scincidae), From Papua New Guinea, Chris T. Mcallister, Donald W. Duszynski, Robert N. Fisher, Christopher C. Austin
Four New Species Of Coccidia (Apicomplexa: Eimeriidae) From Owen Stanley Skinks, Papuascincus Stanleyanus (Sauria: Scincidae), From Papua New Guinea, Chris T. Mcallister, Donald W. Duszynski, Robert N. Fisher, Christopher C. Austin
Faculty Publications
© Institute of Parasitology, Biology Centre ASCR. Between September and November 1991, 12 Owen Stanley skinks, Papuascincus stanleyanus (Booulenger) were collected from various localities on Papua New Guinea and examined for coccidians. Six (50%) were found to harbour four eimerians that we describe here as new. Oocysts of Eimeria burseyi sp. n. were elongate to ellipsoidal with a bilayered wall and measured (length × width, L × W) 36.0 × 24.0 μm, with a L/W ratio of 1.5. Both micropyle and oocyst residuum were absent, but a polar granule was present. Oocysts of Eimeria goldbergi sp. n. were ellipsoidal, with …
Two New Species Of Eimeria (Apicomplexa, Eimeriidae) From Tree Skinks, Prasinohaema Spp. (Sauria: Scincidae), From Papua New Guinea, Chris T. Mcallister, Donald W. Duszynski, Robert N. Fisher, Christopher C. Austin
Two New Species Of Eimeria (Apicomplexa, Eimeriidae) From Tree Skinks, Prasinohaema Spp. (Sauria: Scincidae), From Papua New Guinea, Chris T. Mcallister, Donald W. Duszynski, Robert N. Fisher, Christopher C. Austin
Faculty Publications
Between September 1991 and June 1992, feces from 4 species of tree skinks, Prasinohaema spp. from Papua New Guinea, were collected and examined for coccidia. Two species, P. flavipes and P. prehensicauda were found to harbor eimerians which are described as new. Oocysts of Eimeria krausi sp. nov. from P. flavipes were ellipsoidal to subspheroidal with a smooth bilayered wall and measured (L × W) 19.2 × 16.9 μm, with a length/width (L/W) ratio of 1.1. Micropyle and oocyst residuum were absent but a fragmented polar granule was present. Sporocysts were ellipsoidal, 9.7 × 6.7 μm, L/W of 1.5. Stieda, …
Intergenic Transcriptional Interference Is Blocked By Rna Polymerase Iii Transcription Factor Tfiiib In Saccharomyces Cerevisiae, Asawari Korde, Jessica M. Rosselot, David Donze
Intergenic Transcriptional Interference Is Blocked By Rna Polymerase Iii Transcription Factor Tfiiib In Saccharomyces Cerevisiae, Asawari Korde, Jessica M. Rosselot, David Donze
Faculty Publications
The major function of eukaryotic RNA polymerase III is to transcribe transfer RNA, 5S ribosomal RNA, and other small non-protein-coding RNA molecules. Assembly of the RNA polymerase III complex on chromosomal DNA requires the sequential binding of transcription factor complexes TFIIIC and TFIIIB. Recent evidence has suggested that in addition to producing RNA transcripts, chromatin-assembled RNA polymerase III complexes may mediate additional nuclear functions that include chromatin boundary, nucleosome phasing, and general genome organization activities. This study provides evidence of another such "extratranscriptional" activity of assembled RNA polymerase III complexes, which is the ability to block progression of intergenic RNA …
Research Matters Spring 2014, Louisiana State University And Agricultural & Mechanical College
Research Matters Spring 2014, Louisiana State University And Agricultural & Mechanical College
Research Matters & RNR Newsletters
Research Matters is a publication which highlights ongoing research, international travel experiences, classroom happenings and degree program developments of and for the School of Renewable Natural Resources' students and faculty.