Digital Commons Network^™

Seed Treatment Using Methyl Jasmonate Induces Resistance To Rice Water Weevil But Reduces Plant Growth In Rice, Emily C. Kraus, Michael J. Stout

Faculty Publications

© 2019 Kraus, Stout. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The jasmonic acid cascade plays a pivotal role in induced plant resistance to herbivores. There have been a number of investigations into the potential uses of derivatives of this hormone for pest management. Understanding the phenotypic plasticity of plant defense traits interactions in agricultural systems may facilitate the development of novel and improved management practices, which is desirable as management of insects …

Dominin And Segon Form Multiprotein Particles In The Plasma Of Eastern Oysters (Crassostrea Virginica) And Are Likely Involved In Shell Formation, Qinggang Xue, Jean Philipe Beguel, Jerome La Peyre

Faculty Publications

Copyright © 2019 Xue, Beguel and La Peyre. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. Dominin and segon are two proteins purified and characterized from the plasma of eastern oysters Crassostrea virginica, making up about 70% of the total plasma …

Growth And Development Symposium: Stem And Progenitor Cells In Animal Growth: The Regulation Of Beef Quality By Resident Progenitor Cells, Xing Fu, Chaoyang Li, Qianglin Liu, Kenneth W. Mcmillin

Faculty Publications

© The Author(s) 2019. Published by Oxford University Press on behalf of the American Society of Animal Science. All rights reserved. The intramuscular adipose tissue deposition in the skeletal muscle of beef cattle is a highly desired trait essential for high-quality beef. In contrast, the excessive accumulation of crosslinked collagen in intramuscular connective tissue contributes to beef toughness. Recent studies revealed that adipose tissue and connective tissue share an embryonic origin in mice and may be derived from a common immediate bipotent precursor in mice and humans. Having the same linkages in the development of adipose tissue and connective tissue …

Erk1/2 Signaling Induces Skeletal Muscle Slow Fiber-Type Switching And Reduces Muscular Dystrophy Disease Severity, Justin G. Boyer, Vikram Prasad, Taejeong Song, Donghoon Lee, Xing Fu, Kelly M. Grimes, Michelle A. Sargent, Sakthivel Sadayappan, Jeffery D. Molkentin

Faculty Publications

© 2019 American Society for Clinical Investigation. MAPK signaling consists of an array of successively acting kinases. ERK1 and -2 (ERK1/2) are major components of the greater MAPK cascade that transduce growth factor signaling at the cell membrane. Here, we investigated ERK1/2 signaling in skeletal muscle homeostasis and disease. Using mouse genetics, we observed that the muscle-specifc expression of a constitutively active MEK1 mutant promotes greater ERK1/2 signaling that mediates fber-type switching to a slow, oxidative phenotype with type I myosin heavy chain expression. Using a conditional and temporally regulated Cre strategy, as well as Mapk1 (ERK2) and Mapk3 (ERK1) …

Fluorescence-Based Ratiometric Nanosensor For Selective Imaging Of Cancer Cells, Isiah M. Warner, Kelsey E. Mcneel, Noureen Siraj, Nimisha Bhattarai

Faculty Publications

Herein, we report the synthesis and characterization of a nanosensor developed from a group of uniform materials based on organic salts (GUMBOS). This sensor is composed of three ionic species, namely, fluorescein, rhodamine B, and tetradecyltrihexyl phosphonium (P-66614) ions. Nanoparticles prepared from this three-component GUMBOS, termed nanoGUMBOS, exhibited increased fluorescence at two wavelengths with increases in pH values. The ratio of fluorescence emission corresponding to FL and RhB components of these nanoGUMBOS also changed with pH, allowing ratiometric analysis of pH through fluorescence measurements. Peak ratios were significantly different at pH 5 and pH 7, indicating potential applications of this …

Synthesis And Investigation Of Phthalocyanine-Biotin Conjugates, M. Graca H. Vicente, Elizabeth A. Okoth, Zehua Zhou, Benson Ongarora

Faculty Publications

An isothiocyanato-functionalized phthalocyanine (Pc) was synthesized in good yield from the corresponding amine-substituted Pc. This Pc reacted with ethanolamine, biotin hydrazine, and biotin diethylamine under mild conditions (room temperature in DMF or DMSO in the presence of TEA) to produce the corresponding thiourea products in 60-75% yields. All Pcs showed intense Q absorptions in DMF around 677 nm, emissions centered at 683 nm, and fluorescence quantum yields in the range 0.18-0.27. The Pcs were phototoxic to human carcinoma HEp2 cells (IC50 similar to 7 at 1.5 J/cm(2)) and localized in multiple organelles, including the lysosomes, Golgi and ER. One biotin-Pc …

Thermal Tolerance And Prediction Of Northern Distribution Of The Crapemyrtle Bark Scale (Hemiptera: Eriococcidae), Zinan Wang, Yan Chen, Rodrigo Diaz

Faculty Publications

© 2019 The Author(s). Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. Physiological limits of non-native species to environmental factors are critical for their establishment and spread in the adventive range. The crapemyrtle bark scale, Acanthococcus lagerstroemiae (Kuwana), is a major pest of crapemyrtles. Despite concerns on its rapid spread, there is a lack of information on potential distribution range of this scale in the United States. To understand this scale's distribution potential, its thermal tolerance was evaluated using higher and lower thermal limits. Exposure time leading to 50 and 90% mortality (Lt50 …

Introduction To The Special Issue On “Economic Modeling Of Natural Resources For Sustainable Development”, Krishna P. Paudel

Faculty Publications

No abstract provided.

Mitofusin 2 Plays A Role In Oocyte And Follicle Development, And Is Required To Maintain Ovarian Follicular Reserve During Reproductive Aging, Man Zhang, Muhammed Burak Bener, Zongliang Jiang, Tianren Wang, Ecem Esencan, Richard Scott, Tamas Horvath, Emre Seli

Faculty Publications

© Zhang et al. Mitochondria change their shape through fusion and fission in order to adapt to their metabolic milieu. Mitofusin-2 (MFN2) is a key regulatory protein in this process, mediating mitochondrial fusion and interaction with endoplasmic reticulum. Targeted deletion of Mfn2 in oocytes resulted in mitochondrial dysfunction and female subfertility associated with impaired oocyte maturation and follicle development. Oocytes lacking MFN2 showed shortened telomeres and increased apoptosis, resulting in compromised oocyte quality and accelerated follicular depletion, consistent with a reproductive aging phenotype.

Dosage Compensation Of The X Chromosomes In Bovine Germline, Early Embryos, And Somatic Tissues, Jingyue Duan, Wei Shi, Nathaniel K. Jue, Zongliang Jiang, Lynn Kuo, Rachel O’Neill, Eckhard Wolf, Hong Dong, Xinbao Zheng, Jingbo Chen, Xiuchun Tian

Faculty Publications

© The Author(s) 2018. Dosage compensation of the mammalian X chromosome (X) was proposed by Susumu Ohno as a mechanism wherein the inactivation of one X in females would lead to doubling the expression of the other. This would resolve the dosage imbalance between eutherian females (XX) versus male (XY) and between a single active X versus autosome pairs (A). Expression ratio of X- and A-linked genes has been relatively well studied in humans and mice, despite controversial results over the existence of upregulation of X-linked genes. Here we report the first comprehensive test of Ohno’s hypothesis in bovine preattachment …

Methylome Dynamics Of Bovine Gametes And In Vivo Early Embryos, Jingyue Ellie Duan, Zongliang Carl Jiang, Fahad Alqahtani, Ion Mandoiu, Hong Dong, Xinbao Zheng, Sadie L. Marjani, Jingbo Chen, Xiuchun Cindy Tian

Faculty Publications

Copyright © 2019 Duan, Jiang, Alqahtani, Mandoiu, Dong, Zheng, Marjani, Chen and Tian. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. DNA methylation undergoes drastic fluctuation during early mammalian embryogenesis. The dynamics of global DNA methylation in bovine embryos, however, have …

Dosage Compensation And Gene Expression Of The X Chromosome In Sheep, Jingyue Duan, Kaleigh Flock, Nathanial Jue, Mingyuan Zhang, Amanda Jones, Sahar Al Seesi, Ion Mandoiu, Sambhu Pillai, Maria Hoffman, Rachel O'Neill, Steven Zinn, Kristen Govoni, Sarah Reed, Hesheng Jiang, Zongliang Jiang, Xiuchun Tian

Faculty Publications

© 2019 by the Genetics Society of America. Ohno's hypothesis predicts that the expression of the single X chromosome in males needs compensatory upregulation to balance its dosage with that of the diploid autosomes. Additionally, X chromosome inactivation ensures that quadruple expression of the two X chromosomes is avoided in females. These mechanisms have been actively studied in mice and humans but lag behind in domestic species. Using RNA sequencing data, we analyzed the X chromosome upregulation in sheep fetal tissues from day 135 of gestation under control, over or restricted maternal diets (100%, 140% and 60% of National Research …

A Highly Contiguous Reference Genome For Northern Bobwhite (Colinus Virginianus), Jessie F. Salter, Oscar Johnson, Norman J. Stafford, William F. Herrin, Darren Schilling, Cody Cedotal, Robb T. Brumfield, Brant C. Faircloth

Faculty Publications

Copyright © 2019 Salter et al. Northern bobwhites (Colinus virginianus) are small quails in the New World Quail family (Odontophoridae) and are one of the most phenotypically diverse avian species. Despite extensive research on bobwhite ecology, genomic studies investigating the evolution of phenotypic diversity in this species are lacking. Here, we present a new, highly contiguous assembly for bobwhites using tissue samples from a vouchered, wild, female bird collected in Louisiana. By performing a de novo assembly and scaffolding the assembly with Dovetail Chicago and HiC libraries and the HiRise pipeline, we produced an 866.8 Mb assembly including 1,512 scaffolds …

Louisiana Agriculture Winter, 2019, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

Normal Tissue Damage: Its Importance, History And Challenges For The Future, Jacqueline P. Williams, Wayne Newhauser

Faculty Publications

Sir Oliver Scott, a philanthropist and radiation biologist and, therefore, the epitome of a gentleman and a scholar, was an early Director of the BECC Radiobiology Research Unit at Mount Vernon. His tenure preceded that of Jack Fowler, with both contributing to basic, translational and clinical thought and application in radiation across the globe. With respect to this review, Fowler's name in particular has remained synonymous with the use of models, both animal and mathematical, that assess and quantify the biological mechanisms that underlie radiation-associated normal tissue toxicities. An understanding of these effects is critical to the optimal use of …

Ecogeographical Rules And The Macroecology Of Food Webs, Benjamin Baiser, Dominique Gravel, Alyssa R. Cirtwill, Jennifer A. Dunne, Ashkaan K. Fahimipour, Luis J. Gilarranz, Joshua A. Grochow, Daijiang Li, Neo D. Martinez, Alicia Mcgrew, Timothée Poisot, Tamara N. Romanuk, Daniel B. Stouffer, Lauren B. Trotta, Fernanda S. Valdovinos, Richard J. Williams, Spencer A. Wood, Justin D. Yeakel

Faculty Publications

© 2019 John Wiley & Sons Ltd Aim: How do factors such as space, time, climate and other ecological drivers influence food web structure and dynamics? Collections of well-studied food webs and replicate food webs from the same system that span biogeographical and ecological gradients now enable detailed, quantitative investigation of such questions and help integrate food web ecology and macroecology. Here, we integrate macroecology and food web ecology by focusing on how ecogeographical rules [the latitudinal diversity gradient (LDG), Bergmann's rule, the island rule and Rapoport's rule] are associated with the architecture of food webs. Location: Global. Time period: …

Impacts Of Experimental Flooding On Microbial Communities And Methane Fluxes In An Urban Meadow, Baton Rouge, Louisiana, Gary M. King, Katherine Henry

Faculty Publications

© 2019 King and Henry. The impacts of extended flooding on microbial communities and their activities in natural and agricultural wetlands have been well-documented, but there is little basis for predicting the responses of urban soil microbial communities to infrequent, short-term flooding. To assess these responses, surface soil samples (0–1 cm) and intact soil cores (10 cm depth) were collected from an urban meadow in Baton Rouge, LA subsequent to an unprecedented flood during August 2016. During the flood, a topographically low region of the meadow (LM) was inundated for at least several days, while an elevated area (upper meadow …

A Taxonomic Synopsis Of Virola (Myristicaceae) In Mesoamerica, Including Six New Species, Daniel Santamaría-Aguilar, Reinaldo Aguilar, Laura P. Lagomarsino

Faculty Publications

© Daniel Santamaría-Aguilar et al. A taxonomic synopsis of Virola (Myristicaceae) is presented for Mesoamerica. Fourteen species are recognised, amongst them six are described and published as new, based on morphology: V. allenii D.Santam. & Aguilar, sp. nov. from Costa Rica, V. otobifolia D.Santam., sp. nov. from Panama and V. amistadensis D.Santam., sp. nov., V. chrysocarpa D.Santam. & Aguilar, sp. nov., V. fosteri D.Santam., sp. nov. and V. montana D.Santam., sp. nov. from both Costa Rica and Panama. Additionally, a lectotype is designated for V. koschnyi, accompanied by an epitype in view of the fragmentary material. Finally, we recognise V. …

Population Expansion Of An Antarctic King Crab?, Michael E. Hellberg, Richard B. Aronson, Kathryn E. Smith, Mark I. Duhon, Shane T. Ahyong, Gustavo A. Lovrich, Sven Thatje, James B. Mcclintock

Faculty Publications

© 2019, the authors. Benthic assemblages of the Antarctic continental shelf are dominated by sessile and slow-moving, epifaunal invertebrates. This community structure persists because shell-crushing (durophagous) predators are absent or ecologically insignificant in shelf habitats. Durophagous teleosts, elasmobranchs, and crustaceans have been excluded by cold waters over the Antarctic shelf for millions of years. Now, as shallow waters warm rapidly, predatory king crabs (Lithodidae) living in the upper bathyal zone could emerge onto the shelf and into nearshore habitats. To assess the potential for a bathymetric expansion, we genetically inferred the historical demography of a population of the most abundant …

Role Of Type I Interferon (Ifn) In The Respiratory Syncytial Virus (Rsv) Immune Response And Disease Severity, Diego R. Hijano, Luan D. Vu, Lawrence M. Kauvar, Ralph A. Tripp, Fernando P. Polack, Stephania A. Cormier

Faculty Publications

© 2019 Hijano, Vu, Kauvar, Tripp, Polack and Cormier. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. Respiratory syncytial virus (RSV) is the most common cause of lower respiratory tract disease in children patients, such as premature infants, patients with cardiac …

Local Adaptation Drives The Diversification Of Effectors In The Fungal Wheat Pathogen Parastagonospora Nodorum In The United States, Jonathan K. Richards, Eva H. Stukenbrock, Jessica Carpenter, Zhaohui Liu, Christina Cowger, Justin D. Faris, Timothy L. Friesen

Faculty Publications

Filamentous fungi rapidly evolve in response to environmental selection pressures in part due to their genomic plasticity. Parastagonospora nodorum, a fungal pathogen of wheat and causal agent of septoria nodorum blotch, responds to selection pressure exerted by its host, influencing the gain, loss, or functional diversification of virulence determinants, known as effector genes. Whole genome resequencing of 197 P. nodorum isolates collected from spring, durum, and winter wheat production regions of the United States enabled the examination of effector diversity and genomic regions under selection specific to geographically discrete populations. 1,026,859 SNPs/InDels were used to identify novel loci, as well …

Larval Pollen Stress Increases Adult Susceptibility To Clothianidin In Honey Bees, Christina L. Mogren, Robert G. Danka, Kristen B. Healy

Faculty Publications

Neonicotinoid insecticides have come under scrutiny for their potential role in honey bee declines. Additionally, reduced access to forage in agricultural areas creates the potential for risk interactions with these pesticides in regions critical for honey production. In this study, we sought to determine whether sufficient access to pollen during larval development could mitigate stress associated with oral clothianidin exposure in honey bee adults. An apiary was established where pollen traps deprived half of the colonies of pollen, which was then supplemented to the others. Adults were fed 0, 10, 40, 200, or 400 µg/L clothianidin in the laboratory, and …

Effector Gene Reshuffling Involves Dispensable Mini-Chromosomes In The Wheat Blast Fungus, Zhao Peng, Ely Oliveira-Garcia, Guifang Lin, Ying Hu, Melinda Dalby, Pierre Migeon, Haibao Tang, Mark Farman, David Cook, Frank F. White, Barbara Valent, Sanzhen Liu

Faculty Publications

Newly emerged wheat blast disease is a serious threat to global wheat production. Wheat blast is caused by a distinct, exceptionally diverse lineage of the fungus causing rice blast disease. Through sequencing a recent field isolate, we report a reference genome that includes seven core chromosomes and mini-chromosome sequences that harbor effector genes normally found on ends of core chromosomes in other strains. No mini-chromosomes were observed in an early field strain, and at least two from another isolate each contain different effector genes and core chromosome end sequences. The mini-chromosome is enriched in transposons occurring most frequently at core …

Lsu General Catalog 2019-2020, 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.

Management Of Economically Important Insect Pests Of Millet, Ruparao T. Gahukar, Gadi V.P. Reddy, Tom Royer

Faculty Publications

Grain of various species of millet is a staple food of rural communities in sub-Saharan Africa, the Indian subcontinent, and China. In addition, millet is used as poultry and cattle feed in the United States, and the foliage is fodder for cattle in India. The crop is damaged by at least 150 insect pests during its growth and development. Although the current status of all of these pests is not known, shoot flies, stem borers, leaf-sucking, and the panicle-attacking insects are considered economically important. Control measures include the application of synthetic pesticides (as both seed treatment and foliar applications) and …

Examining The Interaction Of State And Trait Anxiety On Working Memory Performance, Carly C. Moore

Honors Capstones

No abstract provided.

Dosage Compensation Of The X Chromosomes In Bovine Germline, Early Embryos, And Somatic Tissues, Zongliang Jiang

Faculty Publications

Dosage compensation of the mammalian X chromosome (X) was proposed by Susumu Ohno as a mechanism wherein the inactivation of one X in females would lead to doubling the expression of the other. This would resolve the dosage imbalance between eutherian females (XX) versus male (XY) and between a single active X versus autosome pairs (A). Expression ratio of X- and A-linked genes has been relatively well studied in humans and mice, despite controversial results over the existence of upregulation of X-linked genes. Here we report the first comprehensive test of Ohno's hypothesis in bovine preattachment embryos, germline, and somatic …

Californios, Anglos, And The Performance Of Oligarchy In The U.S. West, Evan Rothera

Civil War Book Review

Andrew Gibb, currently assistant professor of theater history, theory, and criticism at Texas Tech University, offers an important revision of modern understandings of the U.S. West, particularly California. “Despite the individualist ideology that valorizes the working-class Anglos frontiersman,” Gibb asserts, “the truth is that ever since he began to arrive in the West, he had led a life dominated by local oligarchs (1). As Anglos arrived in California, they discovered a uniquely californio (Mexican Californian) system of social organization. This book draws heavily on theory, particularly the idea of performance, to demonstrate how public events both celebrate and proclaim the …

Bibliometrics For Faculty Evaluation: A Statistical Comparison Of H-Indexes Generated Using Google Scholar And Web Of Science Data, David J. Dunaway

Faculty Publications

The growing need for quantification of research performance for promotion and tenure

and grant funding decisions has lead many to rely on citation metrics. There are many metrics to choose from but one of the most common is the h-index. While the h-index has been criticized by many, the metric itself is not the only concern. The source of the citation information used to calculate the h-index is also important. In this case study the h-index was calculated using citation data from Clarivate’s Web of Science (WoS) and Google Scholar (GS) for a selection of faculty working at a large …

Quantifying Amphibian Range Fragmentation In The Southeastern United States, Catherine E. Newman, Christopher C. Austin

Faculty Publications

© the authors. An often overlooked component of research on factors that drive amphibian geographic distributions is description of species range shape. Broad-scale range disjunction has implications for phylogeography, ecology, and conservation, but descriptions of fragmentation are usually based on subjective visual assessment of range maps. Here, we describe a method for objectively quantifying range fragmentation and use this method to describe the patterns of amphibian species range shapes in the southeastern United States, home to the highest amphibian species richness in North America. Species ranges varied widely in degree of fragmentation, from completely contiguous to highly fragmented, and degree …