Digital Commons Network^™

The Plant Structure Ontology, A Unified Vocabulary Of Anatomy And Morphology Of A Flowering Plant, Katica Ilic, Elizabeth A. Kellogg, Pankaj Jaiswal, Felipe Zapata, Peter F. Stevens, Leszek P. Vincent, Shulamit Avraham, Leonore Reiser, Anuradha Pujar, Martin M. Sachs, Noah T. Whitman, Susan R. Mccouch, Mary L. Schaeffer, Doreen H. Ware, Lincoln D. Stein, Seung Y. Rhee

Peter Stevens

Cadherin-2 Participates In The Morphogenesis Of The Zebrafish Inner Ear, Sherry Babb-Clendenon, Yu-Chi Shen, Qin Liu, Katharyn E. Turner, M. Susan Mills, Greg W. Cook, Caroline A. Miller, Vincent H. Gattone Ii, Kate F. Barald, James A. Marrs

Qin Liu

Molecular mechanisms that control inner ear morphogenesis from the placode to the three-dimensional functional organ are not well understood. We hypothesize that cell-cell adhesion, mediated by cadherin molecules, contributes significantly to various stages of inner ear formation. Cadherin-2 (Cdh2) function during otic vesicle morphogenesis was investigated by examining morpholino antisense oligonucleotide knockdown and glass onion (glo) ( Cdh2 mutant) zebrafish embryos. Placode formation, vesicle cavitation and specification occurred normally, but morphogenesis of the otic vesicle was affected by Cdh2 deficiency: semicircular canals were reduced or absent. Phalloidin staining of the hair cell stereocillia demonstrated that cadherin-2 (cdh2) loss-of-function did not …

Peritrophic Membrane Of The Penaeid Shrimp, Sicyonia Ingentis; Structure, Formation And Permeability., Gary Martin

Gary Martin

Peritrophic membranes (PTMs) are secreted acellular layers that separate ingested materials from the gut epithelium in a variety of invertebrates. In insects and crustaceans, PTMs are produced in the midgut trunk (MGT, or intestine), but the MGT in decapod crustaceans, unlike that of insects, is not involved with digestion or absorption of food. We demonstrate that the PTM in the penaeid shrimp Sicyonia ingentis is similar to that in other crustaceans that have been studied and is primarily composed of chitin. The lectin WGA binds only to the PTM and glycocalyx along the microvilli of the midgut cells, which is …

Quantitative Profiling Of Arabidopsis Polar Glycerolipids In Response To Phosphorus Starvation. Roles Of Phospholipases Dζ1 And Dζ2 In Phosphatidylcholine Hydrolysis And Digalactosyldiacylglycerol Accumulation In Phosphorus-Starved Plants, Xuemin Wang, Maoyin Li, Ruth Welti

Xuemin (Sam) Wang

The Localized Dynamics Of A Ca2+Channel (30-Minute Talk), Borbala Mazzag, Christoper Tignanelli, Gregory D. Smith

Borbala Mazzag

No abstract provided.

Evaluating The Monophyly Of Eulimnadia And The Limnadiinae (Branchiopoda : Spinicaudata) Using Dna Sequences, W. R. Hoeh, N. D. Smallwood, D. M. Senyo, E. G. Chapman, Stephen C. Weeks

Stephen C. Weeks

The evolutionary relationships among the six nominal genera within the spinicaudate clam shrimp family Limnadiidae, as well as the validity of the limnadiid genus Eulimnadia, have been much debated in the literature with little consensus emerging. The lack of resolution on these topics impedes evaluations of limnadiid biodiversity, phylogeny, and character evolution. To address these issues, we used Bayesian and parsimony methods to analyze DNA sequences from three genetic loci (28S, 12S, cytb) that were obtained from representatives of five nominal limnadiid genera and one undescribed limnadiid species. These analyses confirm the monophyly of Eulimnadia and the most taxonomically inclusive …

Homeland Security: Engaging The Frontlines - Symposium Proceedings, George H. Baker, Cheryl J. Elliott

George H Baker

The rise of the American homeland security endeavor under the leadership of the new Department of Homeland Security has been heralded by several major national strategy documents. These documents have served to organize efforts at top levels within the government and industry. However, the national strategy guidance is not getting to many organizations and people at the grass-roots level who can make the most difference in preventing attacks, protecting systems, and recovering from catastrophic events, viz. the general citizenry, private infrastructure owners, and local governments. To better understand grass-roots issues and solutions, James Madison University, in cooperation with the Federal …

A Subset Of Mer1p-Dependent Introns Requires Bud13p For Splicing Activation And Nuclear Retention, Marc Spingola, Frederick W. Scherrer Jr

Marc Spingola

Phylogeography Of The Flag Cabrilla Epinephelus Labriformis (Serranidae): Implications For The Biogeography Of The Tropical Eastern Pacific And The Early Stages Of Speciation In A Marine Shore Fish, Mathew T. Craig, Phillip A. Hastings, Daniel J. Pondella Ii, D. Ross Robertson, Jorge A. Rosales-Casián

Daniel Pondella

To examine the role of previously described biogeographical boundaries in shaping phylogeographical relationships within and among two putative eastern Pacific sibling species, the flag cabrilla, Epinephelus labriformis and the Clipperton grouper, Epinephelus clippertonensis (Serranidae).

Rapid Signaling At The Plasma Membrane By A Nuclear Receptor For Thyroid Hormone, Hemayet Ullah

Hemayet Ullah

Littoral Benthic Marcroinvertebrates Under Contrasting Drawdown In A Reservoir And A Natural Lake, Paula Furey, Rick N. Nordin, Asit Mazumder

Paula Furey

No abstract provided.

Longitudinal Changes In Visual Acuity In Keratoconus, Larry J. Davis, Kenneth B. Schechtman, Brad S. Wilson, Carol E. Rosenstiel, Colleen H. Riley, David P. Libassi, Ralph E. Gundel, Louis Rosenberg, Mae O. Gordon, Karla Zadnik

Larry Davis

Double Knockouts Of Phospholipases Dζ1 And Dζ2 In Arabidopsis Affect Root Elongation During Phosphate-Limited Growth But Do Not Affect Root Hair Patterning, Xuemin Wang, Maoyin Li, Chunbo Qin, Ruth Welti

Xuemin (Sam) Wang

Variation In The Innate And Acquired Arms Of The Immune System Among Five Shorebird Species, Luisa Mendes, Theunis Piersma, Dennis Hasselquist, Kevin D. Matson, Robert E. Ricklefs

Robert Ricklefs

Costs And Benefits Of Gregarious Feeding In The Meadow Spittlebug, Philaenus Spumarius, Warren Abrahamson, M.J. Wise, D.L. Kieffer

Warren G. Abrahamson, II

No abstract provided.

Post-Fire Canopy Recovery In Two Fire-Adapted Palms, Serenoa Repens And Sabal Etonia (Arecaceae), Warren Abrahamson, C.R. Abrahamson

Warren G. Abrahamson, II

No abstract provided.

Ecology Of Marine Fishes : California And Adjacent Waters, Larry Allen, Daniel Pondella, Michael Horn

Daniel Pondella

Fundamental ideas in marine ecology have emerged from the study of marine fishes. This unique, authoritative, and accessible reference, compiled by 35 luminary ecologists, evolutionary biologists, and ichthyologists, provides the first-ever synthesis and interpretation of the large, often daunting, body of information on the ecology of marine fishes. Comprehensive and generously illustrated, this volume focuses on the fauna of the eastern pacific, paying particular attention to the California coast, which is among the most diverse and best studied of all marine ecosystems.

Tailor-Made Composite Functions As Tools In Model Choice: The Case Of Sigmoidal Vs Bi-Linear Growth Profiles, Winfried Peters, Tobias Baskin

Winfried S. Peters

Scrub Hickory: A Florida Endemic, Warren Abrahamson, J.N. Layne

Warren G. Abrahamson, II

No abstract provided.

The Effect Of Environmental Parameters And Cyanobacterial Blooms On Phytoplankton Dynamics Of A Portuguese Temperate Lake, Daniela De Figueiredo, Ana Reboleira, S. Antunes, N. Abrantes, U. Azeiteiro, F. Gonçalves, M. Pereira

Ana Sofia P.S. Reboleira

The increasing occurrence of cyanobacterial blooms in freshwaters is of great concern due to the ability of many cyanobacteria to produce cyanotoxins. In the present work, the eutrophied Vela Lake (Central Portugal), used for recreational purposes and as a water source for agriculture, was monitored every fortnight between 2000 and 2001. Phytoplankton diversity and densities were measured and correlated to environmental parameters. A seasonal phytoplanktonic succession was observed and it was mainly correlated with conductivity, temperature, total suspended solids and nutrients availability (particularly phosphorus). Diatoms were dominant during winter months (inferior temperatures and higher nutrients availability) followed by green algae …

African-American Mitochondrial Dnas Often Match Mtdnas Found In Multiple African Ethnic Groups [Published Correction Appears In Bmc Biol 2006; 5:13], Bert Ely, Jamie L. Wilson, Fatimah Linda Collier Jackson, Bruce A. Jackson

Fatimah Linda Collier Jackson

Rack1 Mediates Multiple Hormone Responsiveness And Developmental Processes In Arabidopsis, Hemayet Ullah

Hemayet Ullah

Identification And Characterization Of A New Class Of Bilin Lyase Responsible For Attachment Of Phycocyanobilin To Cys-153 On The Β-Subunit Of Phycocyanin In Synechococcus Sp. Pcc 7002, Wendy M. Schluchter

Wendy M Schluchter

No abstract provided.

Molecular Detection Of Marine Invertebrate Larvae, Shana Goffredi, William J. Jones, Christopher A. Scholin, Roman Marin Iii, Robert C. Vrijenhoek

Shana Goffredi

The ecological patterns of many invertebrate larvae remain an ongoing mystery, in large part owing to the difficult task of detecting them in the water column. The development of nucleic-acid-based technology has the potential to resolve this issue by direct identification and monitoring of embryonic and larval forms in situ. We report herein on the successful development and application of nucleic-acid-based sandwich hybridization assays that detect barnacles using rRNA-targeted probes with both group-(order Thoracica) and species-(Balanus glandula) specificity. Primary results include the determination of target 18S rRNA sequences and the construction of "capture" probes for detection of larvae using hybridization …

Silken Toolkits: Biomechanics Of Silk Fibers Spun By The Orb Web Spider Argiope Argentata (Fabricius 1775), Todd A. Blackledge, Cheryl Y. Hayashi

Todd A. Blackledge

Orb-weaving spiders spin five fibrous silks from differentiated glands that contain unique sets of proteins. Despite diverse ecological functions, the mechanical properties of most of these silks are not well characterized. Here, we quantify the mechanical performance of this toolkit of silks for the silver garden spider Argiope argentata. Four silks exhibit viscoelastic behaviour typical of polymers, but differ statistically from each other by up to 250% in performance, giving each silk a distinctive suite of material properties. Major ampullate silk is 50% stronger than other fibers, but also less extensible. Aciniform silk is almost twice as tough as other …

Ethnic Identity And Type 2 Diabetes Health Attitudes In Americans Of African Ancestry, Jelena Brezo, Charmaine D. Royal, Franklin Ampy, Verle Headings

Franklin Ampy

Multiple Sequence Alignment Accuracy And Phylogenetic Inference, T. Heath Ogden, Michael S. Rosenberg

T. Heath Ogden

Phylogenies are often thought to be more dependent upon the specifics of the sequence alignment rather than on the method of reconstruction. Simulation of sequences containing insertion and deletion events was performed in order to determine the role that alignment accuracy plays during phylogenetic inference. Data sets were simulated for pectinate, balanced, and random tree shapes under different conditions (ultrametric equal branch length, ultrametric random branch length, nonultrametric random branch length). Comparisons between hypothesized alignments and true alignments enabled determination of two measures of alignment accuracy, that of the total data set and that of individual branches. In general, our …

Laboratory Bioefficacy Of Creek 1.0g (Tentephos) Against Aedes (Stegomyia) Aegypti (Linnaeus) Lairvae, Chen Chee Dhang

Chen Chee Dhang

The bioefficacy of a commercial formulation of temephos, Creek((R)) againstAedes aegypti larvae was studied in the laboratory. Earthen jars were filled with 10 L tap water each. One g of temephos (Creek((R))) sand granule formulation was added into each earthen jar as recommended by the manufacturer. The final test concentration of Creek((R)) was 1 mg ai./L One earthen jar was filled with 10 L tap water and served as a test control (untreated). Thirty late 3(rd) or early 4(th) instar of lab-bred Ae. aegypti larvae were added into each earthen jar. Mortality of the larvae was recorded after 24 hours …

Female Preferences For Male Calling Songs In The Bladder Grasshopper Bullacris Membracioides, Vanessa C. K. Couldridge, Moira J. Van Staaden

Moira J. van Staaden

Male acoustic signals and the information they convey are often critical determinants of female mate choice. Bladder grasshoppers are one of numerous orthopteran taxa utilizing sound as the basis of courtship and ultimately mating. However, despite the extreme specializations for long-distance acoustic communication in this family, female mating preferences for male calls have not been previously investigated. Here we examine female acoustic responses to playbacks of male calls in Bullacris membracioides. Females were tested in three separate contexts, viz. response to conspecific calls of different individuals, response to degraded conspecific calls, and response to the calls of two heterospecifics. Female …

The Use Of The Major Chelae By Reproductive Male Crayfish (Orconectes Rusticus) For Discrimination Of Female Odours, Rachelle M. Belanger, Paul A. Moore

Paul A. Moore

The major chelae have been found to be important structures used for breeding and reproduction in crustaceans; however their role in the detection of conspecific sex odours is unknown. We implemented a behavioural bioassay to test whether male reproductive (form I) and nonreproductive (form II) crayfish (Orconectes rusticus) use their major chelae to detect reproductive female odours. We videotaped and analysed the behavioural reactions of form I and form II males to four different odour treatments: reproductive female-conditioned water, male-conditioned water, filtered fish homogenate (food odour; positive control), and water (negative control) delivered from an air stone (N = 20 …