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Articles 1 - 30 of 159
Full-Text Articles in Biology
Exploring Mobility: Phylogenetic And Structural Analysis Of The Intein In The Helicase Of Mycobacteriophage Alice, Sandra Xu
Honors Scholar Theses
This paper investigates the intein insertion in the DNA helicase gene Alice_175 of the Mycobacterium phage Alice, exploring its evolutionary significance and potential propagation mechanisms. Using phylogenetic analysis, there is evidence for gene transfer as a driving force in intein dissemination in phage and bacterial genomes. Structural predictions of the Alice_175 intein that were generated through AlphaFold2 as well as a phylogeny generated using SeaView infer a timeline of the intein's invasion and reveal key features that may influence protein functionality and host adaptation. Additionally, protein database searches suggest that intein mobility in this gene may not rely on prophages, …
Investigating Evolution Through The Lens Of Ai-Driven Protein Exploration And Phylogenetic Modeling, Mataya Duncan
Investigating Evolution Through The Lens Of Ai-Driven Protein Exploration And Phylogenetic Modeling, Mataya Duncan
Graduate Theses and Dissertations
Recent advances in computational biology, artificial intelligence, and sequencing technologies have enabled new perspectives for addressing longstanding questions in evolutionary biology. Increased computational power has made large-scale simulations feasible for investigating diverse aspects of evolutionary and phylogenetic modeling. Similarly, deep learning algorithms now allow for the prediction of reasonably accurate tertiary protein structures, unlocking the potential for investigating diversity and evolution of protein structure across a broad range of organisms. This thesis presents two studies that target different aspects of evolutionary inference from unique perspectives. Yet, the share an overarching goal of presenting new perspectives on the evolutionary basis of …
I’M Just Like You: Do Sympatric Lizard Species Exhibit Convergent Morphology? (Genus Sceloporus), Abigail Lamartine, Alison Whiting
I’M Just Like You: Do Sympatric Lizard Species Exhibit Convergent Morphology? (Genus Sceloporus), Abigail Lamartine, Alison Whiting
Library/Life Sciences Undergraduate Poster Competition 2025
The spiny lizards, genus Sceloporus, are the most speciose genus of reptiles endemic to North America. These lizards are commonly seen doing “push-ups” and head bobs, showing off their bright blue belly and throat patches (figure 5).Sceloporus use these displays to attract mates and defend their territory, and the size and color of patches is the most commonly used character to identify species(see figure 3). Within southwestern Utah, there is a small region where two species, S.occidentalis and S. tristichus, overlap in range (figure 1), and lizards can be found that appear to have patches intermediate between the two …
An In-Depth Investigation Into Yersinia Pestis Phages: Isolating A Yersinia Pestis Phage From Soil And Constructing A Comprehensive Phylogenetic Analysis Of Known Yersinia Pestis Phages, Jacqueline Chavez
All HCAS Student Capstones, Theses, and Dissertations
Yersinia pestis, the causative agent of the plague, has become increasingly resistant to many antibiotics; therefore, alternatives such as phage therapy are necessary. Phage therapy uses combinations of bacteriophages or phages, which are viruses that only infect bacteria. However, phages—especially Y. pestis phages —are severely understudied. Thus, this research has sought to specifically isolate a phage from soil that infects Y. pestis. There were 146 samples that were collected from across the US, focusing on those with reported cases of plague. These samples were enriched with Y. pestis to maximize the amount of potential phage that target Y. pestis. …
Prokaryotic Inhabitants Of Hypersaline Brines From Former Salt Mine In Solivar (Presov, Slovakia), Shivani Adhvaryu, Maria Piknova, Lea Nosalova, Lenka Malinicova, Sona Brestovicova, Jana Kiskova, Mariana Kolesarova, Peter Pristas
Prokaryotic Inhabitants Of Hypersaline Brines From Former Salt Mine In Solivar (Presov, Slovakia), Shivani Adhvaryu, Maria Piknova, Lea Nosalova, Lenka Malinicova, Sona Brestovicova, Jana Kiskova, Mariana Kolesarova, Peter Pristas
FRONTIERS UNBOUND: Exploring Extreme Environments
No abstract provided.
A Survey Of The Biodiversity And Phylogeny Of Pucciniales Collected In Puerto Rico, Catherine Liana Rock
A Survey Of The Biodiversity And Phylogeny Of Pucciniales Collected In Puerto Rico, Catherine Liana Rock
Undergraduate Honors Thesis Collection
Rust fungi (Pucciniales) are a diverse group of fungi belonging to the phylum Basidiomycota. Rusts are obligate biotrophic parasites that infect vascular plants many of which have economic and agricultural importance such as legumes, wheat, and coffee crops (Helfer, 2013, Kolmer et al., 2009). In tropical regions of the world, only about 3-4% of the estimated Pucciniales species diversity is known (Piepenbring et al., 2011). This study aims to determine phylogenetic groupings of Pucciniales collected in Puerto Rico using molecular data and to compare this data to rust species previously identified in Cuba, a closely related tropical location in terms …
A Phylogenetic Analysis Of The Population Dynamics Of A Captive Colony Of Diploptera Punctata., Nick Peterson
A Phylogenetic Analysis Of The Population Dynamics Of A Captive Colony Of Diploptera Punctata., Nick Peterson
Theses/Capstones/Creative Projects
The unique milk production of Diploptera punctata makes this species a promising model species in entomology for studying the evolution of milk production and for insect endocrinology. Despite this, the genetic diversity of captive populations of the species is not well studied. To better evaluate the captive diversity and population dynamics of Diploptera punctata at UNO we extracted the DNA of 20 random individuals and amplified their DNA using 4 different primers before cleaning the amplified products and sequencing the genes of the samples for use in both individual and concatenated phylogenetic trees. Our results indicate the UNO colony of …
A Test Of The Gleaner–Opportunist Trade-Off Among Photosynthetic Traits In Cryptophyte Algae, Jake A. Swanson, Matthew J. Greenwold, Tammi L. Richardson, Jeffry L. Dudycha
A Test Of The Gleaner–Opportunist Trade-Off Among Photosynthetic Traits In Cryptophyte Algae, Jake A. Swanson, Matthew J. Greenwold, Tammi L. Richardson, Jeffry L. Dudycha
Biology Faculty Publications and Presentations
As photosynthetic producers, phytoplankton form the foundation of aquaticfood webs. Understanding the relationships among photosynthetic traits inphytoplankton is essential to revealing how diversification of these traitsallows phytoplankton to harvest energy from different light environments. Weinvestigated whether the diversification of 15 species of cryptophytes, a phy-lum of phytoplankton with diverse light-capturing pigments, showed evidenceof trade-offs among photosynthetic performance traits as predicted by the gleaner-opportunist resource exploitation framework. We constructed photo-synthesis versus irradiance (P–E) curves and rapid light curves (RLCs) to estimate parameters characterizing photosynthetic performance and electrontransport rate. We inferred the evolutionary relationships among the 15 specieswith ultraconserved genomic elements and …
Dna Barcoding Indicates Multiple Invasions Of The Freshwater Snail Melanoides Tuberculata Sensu Lato In Florida, Lori Tolley-Jordan, Michael A. Chadwick, Jimmy K. Triplett
Dna Barcoding Indicates Multiple Invasions Of The Freshwater Snail Melanoides Tuberculata Sensu Lato In Florida, Lori Tolley-Jordan, Michael A. Chadwick, Jimmy K. Triplett
Research, Publications & Creative Work
Melanoides tuberculata sensu lato (Thiaridae) are polymorphic female-clonal snails of Asian and African origins that have invaded freshwaters worldwide, including those in Florida. Although the snails have been documented in Florida for at least 70 years, no studies have investigated whether the observed distribution is due to a single introduction or multiple independent invasions. Here, cytochrome oxidase I was used to measure genetic diversity within and among sites in Florida and compare genetic diversity between Florida and other regions of the world. We also examined the relationship between shell morphology and haplotype diversity to determine if shell morphs can serve …
Phylogenomics Reveals The History Of Host Use In Mosquitoes, John Soghigan, Charles Sither, Silvia Andrade Justi, Gen Morinaga, Brian K. Cassel, Christopher J. Vitek, Todd P. Livdahl, Siyang Xia, Andrea Gloria-Soria, Jeffrey R. Powell, Thomas Zavortink, Christopher M. Hardy, Nathan D. Burkett-Cadena, Lawrence E. Reeves, Richard C. Wilkerson, Robert R. Dunn, David K. Yeates, Maria Anice Sallum, Brian D. Byrd, Michelle D. Trautwein, Yvonne-Marie Linton, Michael H. Reiskind, Brian M. Wiegmann
Phylogenomics Reveals The History Of Host Use In Mosquitoes, John Soghigan, Charles Sither, Silvia Andrade Justi, Gen Morinaga, Brian K. Cassel, Christopher J. Vitek, Todd P. Livdahl, Siyang Xia, Andrea Gloria-Soria, Jeffrey R. Powell, Thomas Zavortink, Christopher M. Hardy, Nathan D. Burkett-Cadena, Lawrence E. Reeves, Richard C. Wilkerson, Robert R. Dunn, David K. Yeates, Maria Anice Sallum, Brian D. Byrd, Michelle D. Trautwein, Yvonne-Marie Linton, Michael H. Reiskind, Brian M. Wiegmann
Biology
Mosquitoes have profoundly affected human history and continue to threaten human health through the transmission of a diverse array of pathogens. The phylogeny of mosquitoes has remained poorly characterized due to difficulty in taxonomic sampling and limited availability of genomic data beyond the most important vector species. Here, we used phylogenomic analysis of 709 single copy ortholog groups from 256 mosquito species to produce a strongly supported phylogeny that resolves the position of the major disease vector species and the major mosquito lineages. Our analyses support an origin of mosquitoes in the early Triassic (217 MYA [highest posterior density region: …
The Phylogeny Predicts Potential New Sources Of Antibiotics From Plants, Malini Anna Prasad, Jeanmaire Molina
The Phylogeny Predicts Potential New Sources Of Antibiotics From Plants, Malini Anna Prasad, Jeanmaire Molina
Discovery Day
The evolution and spread of antibiotic resistance has been the greatest threat to successful antibiotic treatment, and hence the driving force behind the search for new therapies. None of our modern pharmaceutical antibiotics have been developed from plants, albeit plants have been used since antiquity in traditional medicine to fight bacterial infections. We phylogenetically analyzed 138 plant species with antibacterial activity and found 5 plant families that are disproportionately important, with confamilials exerting similar antibacterial mechanisms, as expected due to common ancestry. Myrtaceae (guava family) was shown to inhibit quorum sensing, disrupting bacterial communication implicated in pathogenicity, due to its …
Morphological Trait Evolution In Solanum (Solanaceae): Evolutionary Lability Of Key Taxonomic Characters, Rebecca Hilgenhof, Edeline Gagnon, Sandra Knapp, Xavier Aubriot, Eric Tepe, Lynn Bohs, Leandro Giacomin, Yuri Gouvea, Andres Orejuela, Christopher T. Martine, Clara Ines Orozco, Iris E. Peralta, Tina Sarkinen
Morphological Trait Evolution In Solanum (Solanaceae): Evolutionary Lability Of Key Taxonomic Characters, Rebecca Hilgenhof, Edeline Gagnon, Sandra Knapp, Xavier Aubriot, Eric Tepe, Lynn Bohs, Leandro Giacomin, Yuri Gouvea, Andres Orejuela, Christopher T. Martine, Clara Ines Orozco, Iris E. Peralta, Tina Sarkinen
Faculty Journal Articles
Solanum is one of the world's largest and economically most important plant genera, including 1245 currently accepted species and several major and minor crops (e.g., tomato, potato, brinjal eggplant, scarlet eggplant, Gboma eggplant, lulo, and pepino). Here we provide an overview of the evolution of 25 key morphological traits for the major and minor clades of this giant genus based on stochastic mapping using a well-sampled recently published phylogeny of Solanum. The most evolutionarily labile traits (showing >100 transitions across the genus) relate to plant structure (growth form and sympodial unit structure), herbivore defence (glandular trichomes), pollination (corolla shape …
Nuclear Phylogeny And Insights Into Whole-Genome Duplications And Reproductive Development Of Solanaceae Plants, Jie Wang, Weibin Xu, Junwen Zhai, Yi Hu, Jing Guo, Caifei Zhang, Yiyong Zhao, Lin Zhang, Christopher T. Martine, Hong Ma, Chien-Hsun Huang
Nuclear Phylogeny And Insights Into Whole-Genome Duplications And Reproductive Development Of Solanaceae Plants, Jie Wang, Weibin Xu, Junwen Zhai, Yi Hu, Jing Guo, Caifei Zhang, Yiyong Zhao, Lin Zhang, Christopher T. Martine, Hong Ma, Chien-Hsun Huang
Faculty Journal Articles
Solanaceae, the nightshade family, have ∼2700 species, including the important crops potato and tomato, ornamentals, and medicinal plants. Several sequenced Solanaceae genomes show evidence for whole-genome duplication (WGD), providing an excellent opportunity to investigate WGD and its impacts. Here, we generated 93 transcriptomes/genomes and combined them with 87 public datasets, for a total of 180 Solanaceae species representing all four subfamilies and 14 of 15 tribes. Nearly 1700 nuclear genes from these transcriptomic/genomic datasets were used to reconstruct a highly resolved Solanaceae phylogenetic tree with six major clades. The Solanaceae tree supports four previously recognized subfamilies (Goetzeioideae, Cestroideae, Nicotianoideae, …
Comparative Genomic Analysis Of 31 Phytophthora Genomes Reveals Genome Plasticity And Horizontal Gene Transfer, Brent A. Kronmiller, Nicolas Feau, Danyu Shen, Javier F. Tabima, Shahin S. Ali, Andrew D. Armitage, Felipe Arredondo, Bryan A. Bailey, Stephanie R. Bollmann, Angela Dale, Richard J. Harrison, Kelly Hrywkiw, Takao Kasuga, Rebecca Mcdougal, Charlotte F. Nellist, Preeti Panda, Sucheta Tripathy, Nari M. Williams, Wenwu Ye, Yuanchao Wang, Richard C. Hamelin, Niklaus Grünwald
Comparative Genomic Analysis Of 31 Phytophthora Genomes Reveals Genome Plasticity And Horizontal Gene Transfer, Brent A. Kronmiller, Nicolas Feau, Danyu Shen, Javier F. Tabima, Shahin S. Ali, Andrew D. Armitage, Felipe Arredondo, Bryan A. Bailey, Stephanie R. Bollmann, Angela Dale, Richard J. Harrison, Kelly Hrywkiw, Takao Kasuga, Rebecca Mcdougal, Charlotte F. Nellist, Preeti Panda, Sucheta Tripathy, Nari M. Williams, Wenwu Ye, Yuanchao Wang, Richard C. Hamelin, Niklaus Grünwald
Biology
Phytophthora species are oomycete plant pathogens that cause great economic and ecological impacts. The Phytophthora genus includes over 180 known species, infecting a wide range of plant hosts, including crops, trees, and ornamentals. We sequenced the genomes of 31 individual Phytophthora species and 24 individual transcriptomes to study genetic relationships across the genus. De novo genome assemblies revealed variation in genome sizes, numbers of predicted genes, and in repetitive element content across the Phytophthora genus. A genus-wide comparison evaluated orthologous groups of genes. Predicted effector gene counts varied across Phytophthora species by effector family, genome size, and plant host range. …
A Cladoxylopsid With Complex Vascular Architecture From The Early Devonian Battery Point Formation (Québec, Canada), Jessica Chu
A Cladoxylopsid With Complex Vascular Architecture From The Early Devonian Battery Point Formation (Québec, Canada), Jessica Chu
Cal Poly Humboldt theses and projects
Cladoxylopsids are seed-free plants that formed the world’s earliest forests and gave rise to horsetails (sphenopsids), but their evolutionary origins are poorly understood. Here, I describe a new Early Devonian cladoxylopsid from the Emsian (400-395 Ma) Battery Point Formation (Québec, Canada). The structural features of this plant indicate taxonomic affinity to cladoxylalean cladoxylopsids and its phylogenetic position supports placement in genus Cladoxylon (the proposed name, Cladoxylon kespekianum sp. nov., to be formalized by peer-reviewed publication). Specimens of this plant are permineralized in calcium carbonate and were studied using the acetate peel technique with light and electron microscopy. Cladoxylon kespekianum is …
Reassessment Of Chirita Umbrophila (Gesneriaceae) Based On Molecular And Morphological Evidence, Peng-Wei Li, James F. Smith, Debabrata Maity, Xi-Zuo Shi, Li-Hua Yang
Reassessment Of Chirita Umbrophila (Gesneriaceae) Based On Molecular And Morphological Evidence, Peng-Wei Li, James F. Smith, Debabrata Maity, Xi-Zuo Shi, Li-Hua Yang
Biology Faculty Publications and Presentations
Chirita umbrophila is a species endemic to Yunnan, China, and its exact systematic position remains a mystery since it was treated as a species with uncertain generic affiliation in the taxonomic revision of Chirita in 1985. In the present study, the phylogenetic relationships between C. umbrophila and its allied species were inferred using two nuclear ribosomal DNA regions (ETS and ITS) and three chloroplast regions (rpl16, rps16, and trnL-F). Additionally, the type locality of C. umbrophila was revisited and flowering specimens were collected and examined. Our phylogenetic analyses showed that Chirita umbrophila is imbedded in three …
Identifying The Distinct Adaptive And Plastic Gene Expression Patterns And Microbial Indicators That Mediate Coral Disease Resistance, Nicholas James Macknight
Identifying The Distinct Adaptive And Plastic Gene Expression Patterns And Microbial Indicators That Mediate Coral Disease Resistance, Nicholas James Macknight
Biology Dissertations - Archive
Infectious diseases are an increasing threat to coral reefs, resulting in altered community structure and hindering the functional contributions of disease susceptible species. While forecasting disease outbreaks based on environmental factors has progressed, we still lack a comparative understanding of susceptibility among coral species that would help predict disease impacts on coral communities. This dissertation compared the phenotypic, microbial, and coral host gene expression responses of seven diverse Caribbean coral species after exposure to white plague disease. Disease incidence and lesion progression rates were evaluated over a seven-day exposure. Coral microbiomes and RNA were sampled after lesion appearance or at …
Ancestral State Reconstruction Of Oviposition Techniques In New World Stick Insects, Ellie Mcgregor, Jackson Linde, Michael F. Whiting
Ancestral State Reconstruction Of Oviposition Techniques In New World Stick Insects, Ellie Mcgregor, Jackson Linde, Michael F. Whiting
Library/Life Sciences Undergraduate Poster Competition 2022
Phasmids, commonly known as stick bugs, are unique and interesting creatures, both phenotypically and genotypically. Their cryptic abilities are what draws most people to them, but their oviposition techniques, or how they disperse eggs, has become a new source of interest. While most phasmids are known to flick or drop their eggs from the canopy, there are several other techniques including inserting the eggs into the soil or gluing them to a substrate. New world phasmids have not been thoroughly studied, especially in understanding which technique was ancestral. The purpose of this paper was to construct a phylogenetic tree to …
Phylogenomic Discordance Suggests Polytomies Along The Backbone Of The Large Genus Solanum, Edeline Gagnon, Rebeccca Hilgenhof, Andrés Orejuela, Angela J. Mcdonnell, Gaurav Sablok, Xavier Aubriot, Leandro Giacomin, Yuri Gouvêa, Thamyris Bragionis, João Renato Stehmann, Lynn Bohs, Steven Dodsworth, Christopher T. Martine, Péter Poczai, Sandra Knapp, Tiina Särkinen
Phylogenomic Discordance Suggests Polytomies Along The Backbone Of The Large Genus Solanum, Edeline Gagnon, Rebeccca Hilgenhof, Andrés Orejuela, Angela J. Mcdonnell, Gaurav Sablok, Xavier Aubriot, Leandro Giacomin, Yuri Gouvêa, Thamyris Bragionis, João Renato Stehmann, Lynn Bohs, Steven Dodsworth, Christopher T. Martine, Péter Poczai, Sandra Knapp, Tiina Särkinen
Faculty Journal Articles
Premise of the study
Evolutionary studies require solid phylogenetic frameworks, but increased volumes of phylogenomic data have revealed incongruent topologies among gene trees in many organisms both between and within genomes. Some of these incongruences indicate polytomies that may remain impossible to resolve. Here we investigate the degree of gene-tree discordance in Solanum, one of the largest flowering plant genera that includes the cultivated potato, tomato, and eggplant, as well as 24 minor crop plants.
Methods
A densely sampled species-level phylogeny of Solanum is built using unpublished and publicly available Sanger sequences comprising 60% of all accepted species (742 spp.) …
Predicting Gene Function Of Unknown Yeast Orfs Through Phylogenetic Comparative Analysis, Lewis Barr
Predicting Gene Function Of Unknown Yeast Orfs Through Phylogenetic Comparative Analysis, Lewis Barr
Graduate Research Showcase
Yeast (Saccharomyces cerevisiae) has been an instrumental model system for an extraordinary diverse array of research applications for over a century now. The S. cerevisiae genome was fully sequenced in 1996, and, as a result, 6,753 potential proteins were identified. These putative proteins were established by investigating likely open reading frames within the genome. Over the past few decades, nearly 5,000 open reading frames (ORFs) and their expressed proteins have been described, and the remaining undefined open reading frames are labeled as open reading frames of unknown function (ORFans). To better understand the remaining gaps within the S. …
Inferring Phylogenetic Relationships Using The Smith-Waterman Algorithm And Hierarchical Clustering, Rafael Hidalgo, Anthony Devito, Nesreen Salah, Aparna S. Varde, Robert W. Meredith
Inferring Phylogenetic Relationships Using The Smith-Waterman Algorithm And Hierarchical Clustering, Rafael Hidalgo, Anthony Devito, Nesreen Salah, Aparna S. Varde, Robert W. Meredith
Department of Biology Faculty Scholarship and Creative Works
All biological species undergo change over time due to the evolutionary process. These changes can occur rapidly and unpredictably. Due to their high potential to spread quickly, it is critical to be able to monitor changes and detect viral variants. Phylogenetic trees serve as good methods to study evolutionary relationships. Complex big data in biomedicine is plentiful in regards to viral data. In this paper, we analyze phylogenetic trees with reference to viruses and conduct dynamic programming using the Smith-Waterman algorithm, followed by hierarchical clustering. This methodology constitutes an intelligent approach for data mining, paving the way for examining variations …
The Effects Of Average Annual Temperature On Flowering Times And Flower Count, Angela Copploe
The Effects Of Average Annual Temperature On Flowering Times And Flower Count, Angela Copploe
Williams Honors College, Honors Research Projects
Over a course of 15 years, three different species of flowers were examined to see the relationship between the increase in average annual temperature, flowering time, and flower count.
Identification Of A Rickettsial Endosymbiont In A Soft Tick Ornithodoros Turicata Americanus, Lichao Liu, Daniel E. Sonenshine, Hameeda Sultana, Girish Neelakanta
Identification Of A Rickettsial Endosymbiont In A Soft Tick Ornithodoros Turicata Americanus, Lichao Liu, Daniel E. Sonenshine, Hameeda Sultana, Girish Neelakanta
Biological Sciences Faculty Publications
Bacterial endosymbionts are abundantly found in both hard and soft ticks. Occidentia massiliensis, a rickettsial endosymbiont, was first identified in the soft tick Ornithodoros sonrai collected from Senegal and later was identified in a hard tick Africaniella transversale. In this study, we noted the presence of Occidentia species, designated as Occidentia-like species, in a soft tick O. turicata americanus. Sequencing and phylogenetic analyses of the two genetic markers, 16S rRNA and groEL confirmed the presence of Occidentia-like species in O. turicata americanus ticks. The Occidentia-like species was noted to be present in all developmental stages …
Large-Scale Genome Sequencing Of Mycorrhizal Fungi Provides Insights Into The Early Evolution Of Symbiotic Traits, Shingo Miyauchi, Enikő Kiss, Alan Kuo, Elodie Drula, Annegret Kohler, Marisol Sánchez-García, Emmanuelle Morin, Bill Andreopoulos, Kerrie W. Barry, Gregory Bonito, Marc Buée, Akiko Carver, Cindy Chen, Nicolas Cichocki, Alicia Clum, David Culley, Pedro W. Crous, Laure Fauchery, Mariangela Girlanda, Richard D. Hayes, Zsófia Kéri, Kurt Labutti, Anna Lipzen, Vincent Lombard, Jon Magnuson, François Maillard, Claude Murat, Matt Nolan, Robin A. Ohm, Jasmyn Pangilinan, Maíra De Freitas Pereira, Silvia Perotto, David Hibbett
Large-Scale Genome Sequencing Of Mycorrhizal Fungi Provides Insights Into The Early Evolution Of Symbiotic Traits, Shingo Miyauchi, Enikő Kiss, Alan Kuo, Elodie Drula, Annegret Kohler, Marisol Sánchez-García, Emmanuelle Morin, Bill Andreopoulos, Kerrie W. Barry, Gregory Bonito, Marc Buée, Akiko Carver, Cindy Chen, Nicolas Cichocki, Alicia Clum, David Culley, Pedro W. Crous, Laure Fauchery, Mariangela Girlanda, Richard D. Hayes, Zsófia Kéri, Kurt Labutti, Anna Lipzen, Vincent Lombard, Jon Magnuson, François Maillard, Claude Murat, Matt Nolan, Robin A. Ohm, Jasmyn Pangilinan, Maíra De Freitas Pereira, Silvia Perotto, David Hibbett
Biology
Mycorrhizal fungi are mutualists that play crucial roles in nutrient acquisition in terrestrial ecosystems. Mycorrhizal symbioses arose repeatedly across multiple lineages of Mucoromycotina, Ascomycota, and Basidiomycota. Considerable variation exists in the capacity of mycorrhizal fungi to acquire carbon from soil organic matter. Here, we present a combined analysis of 135 fungal genomes from 73 saprotrophic, endophytic and pathogenic species, and 62 mycorrhizal species, including 29 new mycorrhizal genomes. This study samples ecologically dominant fungal guilds for which there were previously no symbiotic genomes available, including ectomycorrhizal Russulales, Thelephorales and Cantharellales. Our analyses show that transitions from saprotrophy to symbiosis involve …
Delineation Of Undescribed, Morphologically Cryptic Cave Beetles Of The Pseudanophthalmus Pubescens Species-Group (Coleoptera: Carabidae: Trechinae), Jedidiah John Nixon
Delineation Of Undescribed, Morphologically Cryptic Cave Beetles Of The Pseudanophthalmus Pubescens Species-Group (Coleoptera: Carabidae: Trechinae), Jedidiah John Nixon
Masters Theses & Specialist Projects
The genus Pseudanophthalmus Jeannel is a widespread and extremely diverse taxon of troglobiont beetle endemic to the karst of eastern North America, with its distribution centered in Tennessee and Kentucky. Despite lying near the heart of this region, the pubescens species-group was thought to contain many undescribed species. In this study, the validities of several of the late Dr. Thomas Barr’s unpublished putative new species in the pubescens-group were tested both morphologically and molecularly. Body measurements (length and width for head, thorax, and abdomen), as well as male genital morphology were compared to see if they reflected theorized species limits.. …
Reptodigitus Chapmanii (Nostocales, Hapalosiphonaceae) Gen. Nov.: A Unique Nostocalean (Cyanobacteria) Genus Based On A Polyphasic Approach1, Dale A. Casamatta, Chelsea D. Villanueva, Alyssa D. Garvey, Holly S. Stocks, Melissa Vaccarino, Petr Dvorak, Petr Hasler, Jeffrey R. Johansen
Reptodigitus Chapmanii (Nostocales, Hapalosiphonaceae) Gen. Nov.: A Unique Nostocalean (Cyanobacteria) Genus Based On A Polyphasic Approach1, Dale A. Casamatta, Chelsea D. Villanueva, Alyssa D. Garvey, Holly S. Stocks, Melissa Vaccarino, Petr Dvorak, Petr Hasler, Jeffrey R. Johansen
2020 Faculty Bibliography
The Nostocales is a monophyletic, heterocytous lineage of cyanobacteria capable of akinete production and division in multiple planes, depending upon family‐level clade. While present in a variety of ecosystems, the diversity of the Nostocales has been poorly elucidated. Due to environmentally ‐induced phenotypic plasticity, morphology alone is often insufficient to determine the true phylogenetic placement of these taxa. In order to bridge this gap, taxonomists now employ the polyphasic approach, combining methods such as morphological analysis, phylogenetic analysis based on DNA sequence and genetic identity based on ribosomal genes, and secondary structure of the 16S‐23S ITS and 16S rRNA gene …
Phylogeny And Taxonomy Of Synechococcus–Like Cyanobacteria, Jiri Komarek, Jeffrey R. Johansen, Jan Smarda, Otakar Strunecký
Phylogeny And Taxonomy Of Synechococcus–Like Cyanobacteria, Jiri Komarek, Jeffrey R. Johansen, Jan Smarda, Otakar Strunecký
2020 Faculty Bibliography
Unicellular cyanobacteria constitute a substantial, ecologically important part of freshwater and marine microflora. Solitary, elongated cyanobacterial cells without apparent slime envelopes and dividing in a single plane perpendicular to the longitudinal axis were traditionally classified into the genus Synechococcus. The type species originates from a freshwater benthic habitat while a number of other Synechococcus–like species were described from diverse environments. Morphologically similar, unicellular populations of “Synechococcus” belong to the most abundant oxygen evolving prokaryotes inhabiting freshwater and oceanic picoplanktic communities. Other species from extreme thermal habitats were described from temperatures over 70 °C. Recent molecular analyses, particularly the 16S rRNA …
Phylogeny Of Terrestrial Isopods Based On The Complete Mitochondrial Genomes, Subvert The Monophyly Of Oniscidea, Rui Zhang, Ruru Chen, Jianmei An, Carlos A. Santamaria
Phylogeny Of Terrestrial Isopods Based On The Complete Mitochondrial Genomes, Subvert The Monophyly Of Oniscidea, Rui Zhang, Ruru Chen, Jianmei An, Carlos A. Santamaria
Integrative Biology Faculty and Staff Publications
Background: Oniscidea is the only truly terrestrial taxon within the Crustacea, and vital to soil formation. However, the monophyly of suborder Oniscidea has been in dispute since 1995, with different studies disagreeing on whether the coastal Ligiidae are included within the suborder. To clarify the phylogenetic hypothesis of suborder Oniscidea, we sequenced the complete mitochondrial genomes of Ligia exotica (Roux, 1828) and Mongoloniscus sinensis (Dollfus, 1901).
Results: Like most metazoan, the complete mitogenomes of two species with circular double strands. The structure and characters of mitogenomes of these two species are analyzed. The constructed phylogenetic analyses show that Oniscidea is …
Temperate Eurasian Origins Of Hawaiian Chenopodium (Amaranthaceae) Plus Description Of A New Species Endemic To Moloka‘I, Jason T. Cantley, Angela J. Mcdonnell, J Branson, S R. Long, W Garnett, Christopher T. Martine
Temperate Eurasian Origins Of Hawaiian Chenopodium (Amaranthaceae) Plus Description Of A New Species Endemic To Moloka‘I, Jason T. Cantley, Angela J. Mcdonnell, J Branson, S R. Long, W Garnett, Christopher T. Martine
Faculty Journal Articles
Chenopodium taxa of Hawai‘i are tetraploids distinguished from other members of the circumglobally distributed genus by minute morphological characters. Because of these reasons, the geographic origin of Hawaiian Chenopodium has remained unclear. Across the Hawaiian Archipelago, Chenopodium taxa are morphologically variable and grow in highly disparate xeric habitats, especially in terms of precipitation, temperature, wind, salt spray, and solar irradiation. Habitats include dry subalpine shrublands, sandy beach strand of atolls in the Northwest Hawaiian Islands, dry forests, and precipitously tall sea cliffs of northwestern Moloka‘i. From the Moloka‘i sea cliffs, which are battered by high energy winds, salt spray, and …
Phylogeny Of The Subfamilies Of Ichneumonidae (Hymenoptera), Andrew M.R. Bennett, Sophie Cardinal, Ian D. Gauld, David B. Wahl
Phylogeny Of The Subfamilies Of Ichneumonidae (Hymenoptera), Andrew M.R. Bennett, Sophie Cardinal, Ian D. Gauld, David B. Wahl
Biology Faculty Publications
A combined morphological and molecular phylogenetic analysis was performed to evaluate the subfamily relationships of the parasitoid wasp family Ichneumonidae (Hymenoptera). Data were obtained by coding 135 morphological and 6 biological characters for 131 exemplar species of ichneumonids and 3 species of Braconidae (the latter as outgroups). The species of ichneumonids represent all of the 42 currently recognized subfamilies. In addition, molecular sequence data (cytochrome oxidase I “DNA barcoding” region, the D2 region of 28S rDNA and part of the F2 copy of elongation factor 1-alpha) were obtained from specimens of the same species that were coded for morphology (1309 …