Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 7
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Characterization and Function of the First Antibiotic Isolated from a Vent Organism: The Extremophile Metazoan Alvinella pompejana 5
Tasiemski, Aurelie; Jung, Sascha; Boidin-wichlacz, Celine; Jollivet, Didier; Cuvillier-hot, Virginie; Pradillon, Florence; Vetriani, Costantino; Hecht, Oliver; Soennichsen, Frank D.; Gelhaus, Christoph; Hung, Chien-wen; Tholey, Andreas; Leippe, Matthias; Groetzinger, Joachim; Gaill, Francoise.
The emblematic hydrothermal worm Alvinella pompejana is one of the most thermo tolerant animal known on Earth. It relies on a symbiotic association offering a unique opportunity to discover biochemical adaptations that allow animals to thrive in such a hostile habitat. Here, by studying the Pompeii worm, we report on the discovery of the first antibiotic peptide from a deep-sea organism, namely alvinellacin. After purification and peptide sequencing, both the gene and the peptide tertiary structures were elucidated. As epibionts are not cultivated so far and because of lethal decompression effects upon Alvinella sampling, we developed shipboard biological assays to demonstrate that in addition to act in the first line of defense against microbial invasion,...
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00219/33052/31517.pdf
Imagem não selecionada

Imprime registro no formato completo
Fossil clams from a serpentinite-hosted sedimented vent field near the active smoker complex Rainbow, MAR, 36 degrees 13 ' N: Insight into the biogeography of vent fauna 5
Lartaud, Franck; De Rafelis, Marc; Oliver, Graham; Krylova, Elena; Dyment, Jerome; Ildefonse, Benoit; Thibaud, Remy; Gente, Pascal; Hoise, Eva; Meistertzheim, Anne-leila; Fouquet, Yves; Gaill, Francoise; Le Bris, Nadine.
Hydrothermal circulation at ultramafic-hosted sites supports a large variety of high-and low-temperature hydrothermal vents and associated ecosystems. The discovery of abundant fossil vesicomyid and thyasirid shell accumulations at the ridge crest, approximately 2.5 km east of the active Rainbow vent field on the Mid-Atlantic Ridge (MAR, 36 degrees 13'N), increased our knowledge regarding the diversity of vent communities at slow spreading ridges. Bivalve molluscs of the family Vesicomyidae were represented by the genus Phreagena. Here we present the first record of this genus in the Atlantic Ocean. This second vesicomyid species known from the MAR, Phreagena sp., was found to be associated with a Thyasira species that is affiliated with T. southwardae (at...
Tipo: Text Palavras-chave: Ultramafic-hosted; Mid-Atlantic Ridge; Bivalve shells; Vesicomyidae; Thyasiridae; Carbon and oxygen isotopes.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00012/12301/9093.pdf
Imagem não selecionada

Imprime registro no formato completo
Fossil evidence for serpentinization fluids fueling chemosynthetic assemblages 5
Lartaud, Franck; Little, Crispin T. S.; De Rafelis, Marc; Bayon, Germain; Dyment, Jerome; Ildefonse, Benoit; Gressier, Vincent; Fouquet, Yves; Gaill, Francoise; Le Bris, Nadine.
Among the deep-sea hydrothermal vent sites discovered in the past 30 years, Lost City on the Mid-Atlantic Ridge (MAR) is remarkable both for its alkaline fluids derived from mantle rock serpentinization and the spectacular seafloor carbonate chimneys precipitated from these fluids. Despite high concentrations of reduced chemicals in the fluids, this unique example of a serpentinite-hosted hydrothermal system currently lacks chemosynthetic assemblages dominated by large animals typical of high-temperature vent sites. Here we report abundant specimens of chemosymbiotic mussels, associated with gastropods and chemosymbiotic clams, in approximately 100 kyr old Lost City-like carbonates from the MAR close to the Rainbow site (36 degrees N). Our finding shows...
Tipo: Text Palavras-chave: Bathymodiolus; Ghost City; Ultramafic-hosted; Mid-ocean ridge; Ecogeochemistry.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00036/14748/15832.pdf
Imagem não selecionada

Imprime registro no formato completo
HOT 96 News 5
Gaill, Francoise; Felbeck, Horst; Desbruyeres, Daniel; Lallier, Francois; Toulmond, A.; Alayse, Anne-marie; Briand, Patrick; Brulport, Jean-pierre; Caprais, Jean-claude; Chevaldonne, P.; Coail, Jean-yves; Cosson, R.; Crassous, Philippe; Delachambre, J.; Durif, C.; Echardour, L.; Herve, G.; Hourdez, Stephane; Jollivet, D.; Kerdoncuff, Jacques; Khripounoff, Alexis; Lechaire, J.p.; Pruski, Audrey; Ravaux, Juliette; Sarradin, Pierre-marie; Shillito, Bruce; Toullec, J.y.; Arndt, C.; Fisher, C.; Lutz, Richard; Childress, J..
Tipo: Text
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00179/29003/27431.pdf
Imagem não selecionada

Imprime registro no formato completo
Spatial and temporal variations in food web structure from newly-opened habitat at hydrothermal vents 5
Gaudron, Sylvie Marylene; Lefebvre, Sebastien; Jorge, Amandine Nunes; Gaill, Francoise; Pradillon, Florence.
To highlight the spatio-temporal variability of the food web structure of hydrothermal vent fauna from newly-opened habitat, a series of Titanium Ring for Alvinellid Colonization devices (TRACs) was deployed at TICA site on the East Pacific Rise in 2006. This experiment was conducted for periods of 4 days, 13 days and one month and deployments were aligned along a gradient from the basaltic bottom to the vent openings. delta C-13 values of colonists revealed a narrower range of carbon sources in proximity to vent openings in Alvinella pompejana habitat than in Tevnia jerichonana habitat, separated by a distance of four meters. This was possibly due to a spatial change in available food sources with a possible higher contribution of particulate organic...
Tipo: Text Palavras-chave: Trophic relationships; Food web structure; Hydrothermal vent; East Pacific Rise; Stable isotopes; Colonization experiment; TRACs; Alvinella pompejana; Epibiosis.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00085/19580/19581.pdf
Imagem não selecionada

Imprime registro no formato completo
Sulphur-oxidizing extracellular bacteria in the gills of Mytilidae associated with wood falls 5
Duperron, Sebastien; Laurent, Melina Cz; Gaill, Francoise; Gros, Olivier.
Six morphotypes of small mussels (Bivalvia: Mytilidae) were found attached to naturally sunken wood collected in the Bohol Sea (Philippines). These specimens are related to the large Bathymodiolus mussels that are found worldwide at cold seeps and hydrothermal vents. In these habitats, the mytilids harbour sulphur- and methane-oxidizing endosymbionts in their gills and depend on the energy and carbon provided by the symbionts. In this study, bacteria associated with the gills of wood-associated mussels are characterized using molecular and microscopic techniques. The existence of bacteria in the lateral zone of gill filaments in all specimens is demonstrated. Comparative analyses of 16S rRNA gene and adenosine 5'-phosphosulphate (APS) reductase gene...
Tipo: Text Palavras-chave: Sulphur-oxidizing bacteria; Bathymodiolus; Idas; Adipicola; Sunken woods; Bohol sea.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00466/57808/60093.pdf
Imagem não selecionada

Imprime registro no formato completo
Sunken wood from the Vanuatu Islands: identification of wood substrates and preliminary description of associated fauna 5
Pailleret, Marie; Haga, Takuma; Petit, Patricia; Prive-gill, Catherine; Saedlou, Nima; Gaill, Francoise; Zbinden, Magali.
Two trawl samples of natural sunken wood collected near Vanuatu were identified based on histological studies. Detailed descriptions were made and microphotographs of the cell types were taken, using the three classical sections (cross, tangential and radial). The botanical characters were compared first to the native flora of Vanuatu, then also to the introduced species. The possibility of transportation by ocean currents with a mainly southern and eastern direction is discussed. The first sample lacks apparent colonization marks. Its main histologic character is the presence of `paedomorphic type I rays' which relates it to the shrubby genera Fitchia (Asteraceae) and Fuchsia (Onagraceae): both are known in Polynesia but they seem not to be recorded from...
Tipo: Text Palavras-chave: Associated fauna; Botanical identification; Sunken wood; Vanuatu; Wood-boring species.
Ano: 2007 URL: https://archimer.ifremer.fr/doc/00205/31627/30048.pdf
Registros recuperados: 7
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional