Relevant bibliographies by topics / Alvinella

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Alvinella'

Author: Grafiati
Published: 26 October 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Alvinella.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Alvinella"

1

Tunnicliffe, Verena, Daniel Desbruyères, Didier Jollivet, and Lucien Laubier. "Systematic and ecological characteristics of Paralvinella sulfincola Desbruyères and Laubier, a new polychaete (family Alvinellidae) from northeast Pacific hydrothermal vents." Canadian Journal of Zoology 71, no. 2 (February 1, 1993): 286–97. http://dx.doi.org/10.1139/z93-041.

Full text
Abstract:
Polychaetes of the family Alvinellidae (Terrebellida) are endemic to hydrothermal vent communities. A new species from the Juan de Fuca and Gorda ridges in the Northeast Pacific is described; aspects of its buccal appendages, segment number, and uncini placement are unique. Because of initial confusion with a sympatric species, Paralvinella palmiformis Desbruyères and Laubier, protein mobilities were examined to differentiate the species electrophoretically with reference to a third alvinellid, Alvinella pompejana. Among the 17 loci scored, fewer than a quarter of the alleles were present in the two Paralvinella species; Paralvinella sulfincola n.sp. has several diagnostic allozymes. This new species inhabits tubes on the sides of active smoker chimneys and migrates upward as the chimney grows. Individuals are recorded within 1 cm of hydrothermal fluids at temperatures in excess of 300 °C; the species appears to have several molecular adaptations to high ambient temperatures. The Alvinellidae form a fascinating group within which to study phylogenetic and selective processes.
APA, Harvard, Vancouver, ISO, and other styles
2

Alayse-Danet, A. M., F. Gaill, and D. Desbruyeres. "In situ Bicarbonate Uptake by Bacteria-Alvinella Associations." Marine Ecology 7, no. 3 (September 1986): 233–40. http://dx.doi.org/10.1111/j.1439-0485.1986.tb00160.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Jeanthon, Christian, and Daniel Prieur. "Susceptibility to Heavy Metals and Characterization of Heterotrophic Bacteria Isolated from Two Hydrothermal Vent Polychaete Annelids, Alvinella pompejana and Alvinella caudata." Applied and Environmental Microbiology 56, no. 11 (1990): 3308–14. http://dx.doi.org/10.1128/aem.56.11.3308-3314.1990.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Lee, Charles K., S. Craig Cary, Alison E. Murray, and Roy M. Daniel. "Enzymic Approach to Eurythermalism of Alvinella pompejana and Its Episymbionts." Applied and Environmental Microbiology 74, no. 3 (December 14, 2007): 774–82. http://dx.doi.org/10.1128/aem.01960-07.

Full text
Abstract:
ABSTRACT The equilibrium model, which describes the influence of temperature on enzyme activity, has been established as a valid and useful tool for characterizing enzyme eurythermalism and thermophily. By introducing K eq, a temperature-dependent equilibrium constant for the interconversion between Eact, the active form of enzyme, and Einact, a reversibly inactive form of enzyme, the equilibrium model currently provides the most complete description of the enzyme-temperature relationship; its derived parameters are intrinsic and apparently universal and, being derived under reaction conditions, potentially have physiological significance. One of these parameters, T eq, correlates with host growth temperature better than enzyme stability does. The vent-dwelling annelid Alvinella pompejana has been reported as an extremely eurythermal organism, and the symbiotic complex microbial community associated with its dorsal surface is likely to experience similar environmental thermal conditions. The A. pompejana episymbiont community, predominantly composed of epsilonproteobacteria, has been analyzed metagenomically, enabling direct retrieval of genes coding for enzymes suitable for equilibrium model applications. Two such genes, coding for isopropylmalate dehydrogenase and glutamate dehydrogenase, have been isolated from the A. pompejana episymbionts, heterologously expressed, and shown by reverse transcription-quantitative PCR to be actively expressed. The equilibrium model parameters of characterized expression products suggested that enzyme eurythermalism constitutes part of the thermal adaptation strategy employed by the episymbionts. Moreover, the enzymes' thermal characteristics correspond to their predicted physiological roles and the abundance and expression of the corresponding genes. This paper demonstrates the use of the equilibrium model as part of a top-down metagenomic approach to studying temperature adaptation of uncultured organisms.
APA, Harvard, Vancouver, ISO, and other styles
5

Wijckmans, Eveline, Mieke Nys, Sarah Debaveye, Marijke Brams, Els Pardon, Katrien Willegems, Daniel Bertrand, Jan Steyaert, Rouslan Efremov, and Chris Ulens. "Functional and Biochemical Characterization of Alvinella pompejana Cys-Loop Receptor Homologues." PLOS ONE 11, no. 3 (March 21, 2016): e0151183. http://dx.doi.org/10.1371/journal.pone.0151183.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Wijckmans, Eveline, Mieke Nys, Sarah Debaveye, Marijke Brams, Els Pardon, Daniel Bertrand, Jan Steyaert, and Chris Ulens. "Functional and Biochemical Characterization of Alvinella Pompejana Cys-Loop Receptor Homologues." Biophysical Journal 110, no. 3 (February 2016): 602a—603a. http://dx.doi.org/10.1016/j.bpj.2015.11.3218.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Mary, Jean, Hélène Rogniaux, Jean-François Rees, and Franck Zal. "Response of Alvinella pompejana to variable oxygen stress: A proteomic approach." PROTEOMICS 10, no. 12 (April 7, 2010): 2250–58. http://dx.doi.org/10.1002/pmic.200900394.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Taylor, Craig D., Carl O. Wirsen, and Françoise Gaill. "Rapid Microbial Production of Filamentous Sulfur Mats at Hydrothermal Vents." Applied and Environmental Microbiology 65, no. 5 (May 1, 1999): 2253–55. http://dx.doi.org/10.1128/aem.65.5.2253-2255.1999.

Full text
Abstract:
ABSTRACT During recent oceanographic cruises to Pacific hydrothermal vent sites (9°N and the Guaymas Basin), the rapid microbial formation of filamentous sulfur mats by a new chemoautotrophic, hydrogen sulfide-oxidizing bacterium was documented in both in situ and shipboard experiments. Observations suggest that formation of these sulfur mats may be a factor in the initial colonization of hydrothermal surfaces by macrofaunal Alvinella worms. This novel metabolic capability, previously shown to be carried out by a coastal strain in H2S continuous-flow reactors, may be an important, heretofore unconsidered, source of microbial organic matter production at deep-sea hydrothermal vents.
APA, Harvard, Vancouver, ISO, and other styles
9

Le Bris, N., and F. Gaill. "How does the annelid Alvinella pompejana deal with an extreme hydrothermal environment?" Reviews in Environmental Science and Bio/Technology 6, no. 1-3 (November 25, 2006): 197–221. http://dx.doi.org/10.1007/s11157-006-9112-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Gaill, F., and Y. Bouligand. "Supercoil of collagen fibrils in the integument of Alvinella, an abyssal annelid." Tissue and Cell 19, no. 5 (January 1987): 625–42. http://dx.doi.org/10.1016/0040-8166(87)90070-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Alvinella"

1

Pradillon, Florence. "Données sur les processus de reproduction et de développement précoce d' un eucaryote thermophile Alvinella pompejana." Paris 6, 2002. http://www.theses.fr/2002PA066462.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zbinden, Magali. "Données sur les interactions biogéochimiques en milieu hydrothermal : l'exemple d'Alvinella pompejana." Aix-Marseille 2, 2001. http://theses.univ-amu.fr.lama.univ-amu.fr/2001AIX20655.pdf.

Full text
Abstract:
L'annélide polychète tubicole Alvinella pompejana, endémique des sources hydrothermales du Pacifique oriental, colonise la paroi des cheminées actives. Dans cet environnement hypervariable, le mélange chaotique de l'eau de mer et du fluide hydrothermal entraîne d'intenses précipitations minérales. Les matrices extracellulaires de cet organisme, et principalement son tube, sont rapidement recouvertes par des dépôts minéraux. L'objectif de ce travail est d'apporter des données sur les interactions de ces organismes avec leur environnement minéral. L'utilisation d'un nouveau système de récolte a permis d'obtenir intacts des biogéoassemblages formés in situ par les précipitations minérales sur les populations d'alvinellidés. Par la suite, la mise au point de méthodes non conventionnelles pour la préparation et l'observation à l'échelle microscopique de matériaux biologiques fortement minéralisés a permis de montrer l'influence réciproque des phases biologiques et minérales. (1) En réponse à la minéralisation rapide de son tube, Alvinella a développé des adaptations qui se traduisent par une capacité de sécrétion de tube et donc de migration le long de la paroi très élevée. Des taux de croissance de 1 cm/jour ont pu être observés. (2) La colonisation de la paroi des cheminées par des communautés biologiques modifie la géochimie locale. La présence des tubes entraîne non seulement la précipitation des minéraux spécifiques (marcassite, FeS2) au contact de leur tube, mais également une compartimentation des minéraux précipités. Alors que la face externe est riche en sulfures de fer, nous avons montré la présence de nanocristaux de sulfures de zinc dans la paroi du tube, quels que soient le degré et le type de minéralisation extérieure. L'observation d'une étroite association spatiale entre ces nanocristaux et les bactéries présentes entre les couches de tube a conduit à l'hypothèse d'une origine microbienne de ces sulfures
Alvinella pompejana is a polychaetous annelid that inhabits deep-sea hydrothermal vent sites along the East Pacific Rise, where it colonizes the walls of actively venting high-temperature chimneys. In this environment, chaotic mixing of hydrothermal fluid and sea water causes abundant mineral precipitations. Extracellular matrix of these organisms, mostly the tube they secrete, are rapidely engulfed in mineral deposits. In situ biogeoassemblages, consisting in alvinellids, tubes and mineral deposits, were collected thank to a new collection device. Non conventional methods were developped for preparation and observation of heavily mineralised biological samples. Use of this method allows the observation of the mutual influence of mineral and biological phases. (1) Alvinella developped adaptations in response to the rapid mineralisation of its tube : high tube secretion rates permit a rapid migration rate along the chimney walls. (2) Presence of the biological communities on the chimney walls can locally modify the geochemistry. Marcasite crust is precipitated specifically under the tubes mass. Furthermore, the tubes occurrence create a partitioning of mineral precipitates. Whereas outer face of the tube is covered by large iron sulfure deposits, we always observed zinc sulfide nanocrystals within the tube wall. Close spatial relationship between these nanocrystals and microorganisms between tube layers leads to the hypothesis of a biologically-induced origin of the sulfides
APA, Harvard, Vancouver, ISO, and other styles
3

Halaimia, Toumi Nassima. "Caractérisation et analyse fonctionnelle des éléments transposables de type mariner issus de deux espèces des sources hydrothermales océaniques (Bythograea thermydron et Alvinella caudata)." Le Mans, 2006. http://cyberdoc.univ-lemans.fr/theses/2006/2006LEMA1023.pdf.

Full text
Abstract:
Le particularisme des organismes des sources hydrothermales nous a conduit à nous interroger sur leurs réponses adaptatives développées. Pour cela, nous avons choisi d’étudier les transposons de type mariner dont l’impact sur la variabilité génétique a été démontrée. Ce sont des segments d’ADN aptes de se déplacer dans le génome, ils ont une structure simple, une longueur d’environ 1300pb. Ils ont un gène qui code la transposase qui est responsable du déplacement de l’élément lui-même. Ce gène est flanqué par des répétitions terminales inversées ; ITR. La transposase reconnaît spécifiquement les ITRs, s’y fixe et coupe l’élément qui est ensuite inséré dans un autre site génomique. La transposase assure toutes les étapes de déplacement. Chez le crabe Bythograea thermydron et l’annélide Alvinella caudata, 29 séquences mariner ont été isolées et caractérisées. Leurs transposases sont capables de reconnaître et de se lier aux ITRs. Elles sont aptes d’engendrer de la coupure
The particularism of the deep-sea hydrothermal organisms led us to question us on their developed adaptive answers. For that, we chose to study mariner transposable elements which their impact on genetic variability was shown. They are segments of DNA able to move in the genome, they have a simple structure, a length of approximately 1300pb. They have a gene which codes the transposase which is responsible for the mobility of the element itself. This gene is flanked by reversed terminal repetitions; ITR. The transposase recognizes and binds ITRs specifically, cut the element and insert it in another genomic site. The transposase ensures all the stages of displacement. 29 mariner sequences were isolated and characterized in the genoms of the crab Bythograea thermydron and the worm Alvinella caudata. Their transposases are able to recognize and to bind to ITRs. They are also ready to generate cut
APA, Harvard, Vancouver, ISO, and other styles
4

Halaimia, Toumi Nassima Laulier Marc. "Caractérisation et analyse fonctionnelle des éléments transposables de type mariner issus de deux espèces des sources hydrothermales océaniques (Bythograea thermydron et Alvinella caudata)." [S.l.] : [s.n.], 2006. http://cyberdoc.univ-lemans.fr/theses/2006/2006LEMA1023.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Gagnière, Nicolas. "Développement d’une suite logicielle pour l’analyse et l’annotation intégrative automatiques de transcrits et de protéines : application aux banques d’ADNc de l’annélide polychète Alvinella pompejana." Strasbourg, 2009. http://www.theses.fr/2009STRA6160.

Full text
Abstract:
Les travaux présentés dans cette thèse s’inscrivent dans le cadre de la génomique à haut-débit, et tout particulièrement l’analyse de séquences d’Expressed Sequence Tags (EST). Les efforts mis en oeuvre ont abouti à la réalisation d’une suite logicielle permettant de gérer une cascade de traitements modulaires. Cette cascade inclut une première phase de prétraitements et d’assemblage visant à améliorer la qualité initiale des EST, qui sont ensuite traduits en séquences protéiques grâce à une combinaison d’approches. La dernière phase consiste en une annotation intégrative des protéines dont l’originalité repose sur l’exploitation du contexte évolutif grâce à l’alignement multiple. La protéine est ensuite replacée au sein de ses réseaux fonctionnels. Les résultats générés sont accessibles via plusieurs interfaces originales de recherche et de visualisation conçues au cours de cette thèse. Les outils développés ont été utilisés pour analyser différentes collections d’EST et de protéines procaryotes et eucaryotes. Ils ont notamment permis l’exploitation de 100 000 séquences de transcrits d’Alvinella pompejana, un Annélide polychète thermotolérant, endémique des sources hydrothermales. Les études comparatives réalisées ont mis en évidence l’importance des gènes impliqués dans l’adaptation au stress oxydatif et à l’hypoxie chez Alvinella ainsi qu’un enrichissement des protéines en acides aminés chargés positivement qui pourrait participer à la thermotolérance de ce ver. Enfin, nos travaux ont révélé l’origine ancestrale de nombreux gènes jusqu’à présent considérés comme spécifiques des Deutérostomes, modifiant ainsi notre vision de l’évolution des Métazoaires
This thesis work concerns high-throughput genomics, and more particularly Expressed Sequence Tag (EST) analysis. The project has led to the development of an EST analysis pipeline capable of managing a suite of analysis modules. The first phase of this pipeline includes pre-processing and assembly of the ESTs to improve their initial quality, and their subsequent translation into protein sequences using a combination of similarity and ab initio approaches. The last phase of the pipeline consists of an original integrative annotation of the proteins, based on their evolutionary context thanks to multiple alignments. The proteins are then mapped onto their functional networks. The generated results can be accessed by several dedicated Web querying and visualisation interfaces designed during this thesis. These developments were used in several studies of prokaryotic and eukaryotic cDNA libraries and proteins. Notably, they enabled the exploitation of 100,000 Alvinella pompejana sequences, a thermotolerant polychaete Annelid, endemic to hydrothermal vents. These comparative studies highlighted crucial genes implicated in Alvinella oxidative stress and hypoxia adaptation, as well as an enrichment in positively charged amino acids of proteins that could be involved in this worm’s thermotolerance. Finally, our work revealed the ancestral origin of several genes previously considered to be Deuterostome specific, thus modifying our vision of Metazoan evolution
APA, Harvard, Vancouver, ISO, and other styles
6

Thomas-Bulle, Camille. "Influence du mode de spéciation sur l'architecture des génomes et la diversité des éléments transposables chez les bivalves et les annélides hydrothermaux." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS688.

Full text
Abstract:
La spéciation est un processus évolutif conduisant à la formation de nouvelles espèces par l’établissement de barrières à la reproduction entre populations. Par l’étude et la cartographie des gènes impliqués dans la spéciation, nous avons caractérisé si l’architecture des divergences synonyme et non-synonyme des gènes reflétait le mode de spéciation pour 2 complexes d’espèces hydrothermales. Pour les annélides du genre Alvinella (allopatrie), la barrière Équatoriale de la dorsale Est-Pacifique limitant le flux génique entre populations a joué un rôle sur l’émergence de barrières à la reproduction renforcées par de l’adaptation locale aux communautés microbiennes. 3 espèces de moules atlantiques du genre Bathymodiolus vivent dans des habitats différant par la profondeur, la composition chimique du fluide et les communautés microbiennes (parapatrie). Les pressions de sélection liées à l’adaptation locale semblent à l’origine des verrous génomiques contrant le flux génique. L’isolement est favorisé par l’éloignement spatial des populations remises en contact localement aboutissant à de l’introgression adaptative. Les éléments transposables impactent aussi l’architecture génomique. Nous avons étudié les rétrotransposons à LTR chez les annélides et mollusques. Les différentes superfamilles suivent des stratégies évolutives distinctes : éléments Gypsy grand nombre de copies diversifiées (théorie de la Reine Rouge), Copia rares et dominés par 3 clades(Domino Day spreading model), BEL/Pao intermédiaires. Leur rôle pourrait être négligeable dans la spéciation chez Alvinella (peu d’ETs) il n’en est pas de même chez Bathymodiolus dont le génome serait composé à50% d’ETs
Speciation is an evolutionary process leading to the emergence of new species through the establishment ofreproductive barriers between populations. By studying and mapping the genes involved in speciation, weinvestigated if the architecture of synonym and non-synonym gene divergences could reflect the on-goingmode of speciation of two sets of hydrothermal species. For the polychaetes of the genus Alvinella (allopatry),the Equatorial barrier from the East Pacific Rise limiting gene flow between populations plays a role in the emergence of reproductive barriers reinforced by local adaptation related to the symbiotic interactions with the local microbial communities of the vents. 3 species of Atlantic deep-sea mussels of the genus Bathymodiolus live in environments of varying depths, fluid chemical composition and microbial communities. The selective pressures due to local adaptation were likely at the origin of the first genomic barriers countering gene flow.Isolation was also favored by spatial distance with local secondary contacts which in turn allowed adaptive introgressions. Transposable elements also impact the architecture of genomes. We studied LTR retrotransposons within the annelid and mollusc genomes. The 3 superfamilies follow distinct evolutionary dynamic strategies: Gypsy elements very diversified with numerous copies (Red Queen dynamics), Copia are rarer and dominated by 3 clades (Domino Days spreading model), BEL/Pao in intermediate position. If their role was probably negligible in the speciation in the Alvinella system (very few mobile elements) this is probably not true in the Bathymodiolus system as TEs make up for roughly 50% of their genomes
APA, Harvard, Vancouver, ISO, and other styles
7

Papot, Claire. "Histoire évolutive et patrons de sélection d’un gène codant un peptide antimicrobien chez deux annélides extrémophiles : le ver côtier Capitella capitata et le ver hydrothermal Alvinella pompejana." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10161/document.

Full text
Abstract:
Les peptides antimicrobiens (PAMs) font partie intégrante du système immunitaire inné de la plupart des organismes en constituant une première ligne de défense contre un large éventail d'agents pathogènes et peuvent également être impliqués dans le contrôle et/ou le confinement de la microflore symbiotique. Le but de cette thèse était d'étudier l'évolution moléculaire de deux gènes codant pour deux précurseurs protéiques de PAMs (preprocapitellacine et preproalvinellacine) caractérisés chez deux annélides extrémophiles : le ver côtier Capitella spp (Cc) et le ver hydrothermal Alvinella pompejana (Ap). Ces précurseurs à partir desquels sont maturés les PAM présentent une structure typique des protéines à BRICHOS: un peptide signal, une propiece, un domaine chaperon BRICHOS et un peptide en épingle à cheveux beta (ici le PAM). Les résultats ont montrés que le même type de mécanismes pourrait co-exister entre les deux taxons annélides étudiés pour promouvoir et maintenir la diversité génétique des deux effecteurs immunitaires dans les différents domaines des précurseurs protéiques (duplication, recombinaison, sélection positive, introgression). Une différence majeure peut être mise en évidence dans la région du PAM qui est monomorphe (sélection purifiante) pour Ap et polymorphe pour Cc. Ceci serait dû à l'absolue nécessité de cultiver une communauté épibiotique hautement spécialisée et obligatoire pour le ver hydrothermal malgré des conditions abiotiques très fluctuantes alors que les espèces côtières de Capitella spp évoluent dans un environnement pathogène dans lequel la diversification de l'arsenal immunitaire constitue un avantage pour renforcer leur potentiel défensif
Antimicrobial peptides (AMP) are integral components of the innate immune system of most organisms in which they provide an early and a first line of defense against a wide range of microbial and microeukaryotic agents. They are also known to shape and control the symbiotic microflora. The aim of this thesis was to study the molecular evolution of two antimicrobial peptides encoding the genes: preproalvinellacin and preprocapitellacin that have been characterized from two annelids: the coastal species Capitella spp (Cc) and the hydrothermal species Alvinella pompejana (Ap). These precursors from which are matured the AMPs alvinellacin and capitellacin, display an original structure of a BRICHOS chaperon: a signal peptide, a propiece, a BRICHOS domain and a beta hairpin peptide (here the AMP). Results show that the same kind of mechanisms might co-occur between the two distinct annelid taxa to promote and maintain genetic diversity for both immune effectors in the precursor domains (duplication, recombination, positive selection, introgression). One major difference can be highlighted in the AMP region that is strictly monomorphic for the Ap species (purifiying selection) and is highly polymorphic in the Cc species. This can be due to the absolute need of farming a highly specialized epibiotic community for the hydrothermal worm despite highly fluctuating abiotic conditions whereas the coastal species of Capitella spp evolved in a more pathogenic environment in which the immune arsenal diversification should be an advantage in enhancing their defensive potential
APA, Harvard, Vancouver, ISO, and other styles
8

Haddad, Michael Alexander. "Phylogenetic characterization of the epibiotic bacteria associated with the hydrothermal vent polychaete Alvinella pompejana." Thesis, 1994. http://hdl.handle.net/1957/35177.

Full text
Abstract:
Symbiotic relationships of bacteria with higher organisms are commonly observed in nature; however, the functional role of these relationships is only rarely understood. This is particularly evident in epibiotic bacterial associations in the marine environment where the bacteria are often a diverse ensemble of microorganisms, thus complicating the identification of the functionally important members. Classical microbiological techniques, relying primarily on culturing these organisms, have provided an incomplete picture of these relationships. Molecular genetic techniques, focusing on the analyses of bacterial 16S rRNA sequences cloned directly from natural microbial populations, are now available which allow a more thorough examination of these associated bacterial populations. This study sought to characterize the epibiotic bacterial population associated with a very unique organism, Alvinella pompejana, using such a molecular approach. Alvinella pompejana is a polychaetous annelid that inhabits active deep-sea hydrothermal vent sites along the East Pacific Rise. This worm colonizes the walls of actively venting high temperature chimneys and is thought to be one of the most thermotolerant metazoans known. The chimney environment is characterized by high concentrations of sulfide and heavy metals in the vicinity of the worm colonies. A morphologically diverse epibiotic microflora is associated with the worm's dorsal integument, with a highly integrated filamentous morphotype clearly dominating the microbial biomass. It has been suggested that this bacterial population participates in either the nutrition of the worm or in detoxification of the worm's immediate environment; however, previous studies have been unable to confirm such a role. The primary goal of this study is to phylogenetically characterize the dominant epibionts through the analysis of 16S rRNA gene sequences. Nucleic acids were extracted from bacteria collected from the dorsal surface of Alvinella pompejana. 16S rRNA genes were amplified with universal bacterial primers by the polymerase chain reaction (PCR). These genes were subsequently cloned and the resulting clone library was screened by restriction fragment length polymorphism (RFLP) analysis to identify unique clone types. Thirty-two distinct clone families were found in the library. Four of these families were clearly dominant, representing over 65% of the library. The main assumption in this study is that the numerical dominance of the phylotypes in the starting population will be reflected in the clone library. Thus, representative clones from the four most abundant clone families were chosen for complete gene sequencing and phylogenetic analysis. These gene sequences were analyzed using a variety of phylogenetic inference methods and were found to be related to the newly established epsilon subdivision of the Proteobacteria. In future studies, these gene sequences will be used to construct specific oligodeoxynucleotide probes which can be used to confirm the morphology of the clone types in the epibiont population.
Graduation date: 1995
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Alvinella"

1

Coelho, Eduardo. Carioca de 1971: A verdadeira história da vitória do Fluminense sobre a Selefogo alvinegra. Rio de Janeiro, RJ: Maquinária Editora, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Haddad, Michael Alexander. Phylogenetic characterization of the epibiotic bacteria associated with the hydrothermal vent polychaete Alvinella pompejana. 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Alvinella"

1

Le Bris, N., and F. Gaill. "How does the annelid Alvinella pompejana deal with an extreme hydrothermal environment?" In Life in Extreme Environments, 315–39. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/978-1-4020-6285-8_20.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Alvinella"

1

Yohe, Laurel, and Drew Syverson. "Morphology of toxic metal distributions in biological soft tissue of deep-sea hydrothermal extremophile polychaete Alvinella pompejana." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.7908.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Alvinella' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography