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Abstract:

Biofilms were allowed to develop on ceramic tiles placed in closed containers on the shore of Potter Cove, 25 de Mayo (King George) Island. Water pumping from the cove inside the containers extended for 25 days. Diatoms were the dominant microalgae in these biofilms, which were removed from a set of tiles to a) characterize the extracellular mucilage, b) carry out floristic determination and c) perform grazing experiments with the limpet Nacella concinna. Biofilms mucilaginous matrix consisted of proteins and carbohydrates. Room temperature aqueous extraction of the freeze-dried material rendered a fraction enriched in the storage glucan chrysolaminarin, its identity confirmed by methylation structural analyses. Hot water extracted products showed greater heterogeneity in monosaccharide composition, including glucose, mannose, galactose, fucose, xylose and rhamnose. Diatom identification revealed that Pseudogomphonema kamtschaticum was the dominant species followed by several Navicula species, Nitzschia pellucida and Synedra kerguelensis. Photographical survey of colonized tiles placed in glass flasks together with a specimen of Nacella concinna exhibited between 5 and 30% removal of the biofilms coverage after 24 h of exposure to the limpet, suggesting that EPS and chrysolaminarin constitute a C-source for the gastropod. © 2018 Elsevier B.V. and NIPR

Registro:

Documento: Artículo
Título:Benthic diatoms from Potter Cove, 25 de Mayo (King George) Island, Antarctica: Mucilage and glucan storage as a C-source for limpets
Autor:Daglio, Y.; Sacristán, H.; Ansaldo, M.; Rodríguez, M.C.
Filiación:Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Consejo Nacional de Investigaciones Científicas y Técnicas- Centro de Investigación de Hidratos de Carbono (CIHIDECAR, CONICET-UBA), Ciudad Universitaria-Pabellón 2, Intendente Güiraldes 2160, Buenos Aires, C1428EGA, Argentina
Centro Austral de Investigaciones Científicas, CONICET, Houssay 200, Ushuaia, V9410CAB, Argentina
Instituto Antártico Argentino, Avenida 25 de Mayo 1151, San Martín, Buenos Aires B1650HML, Argentina
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Ciudad Universitaria-Pabellón 2, Intendente Güiraldes 2160, Buenos Aires, C1428EGA, Argentina
Palabras clave:25 de Mayo (King George) Island; Antarctica; Benthic diatoms; Feeding; Gastropods; Nacella concinna; Potter Cove; β-1,3-glucan; benthos; biofilm; ceramics; diatom; feeding; gastropod; grazing; identification method; microalga; mucilage; polysaccharide; snail; storage; Antarctica; King George Island; Potter Cove; South Shetland Islands; Bacillariophyta; Gastropoda; Nacella concinna; Navicula; Nitzschia pellucida; Patellidae; Pseudogomphonema; Synedra
Año:2018
Volumen:15
Página de inicio:39
Página de fin:48
DOI: http://dx.doi.org/10.1016/j.polar.2018.01.004
Título revista:Polar Science
Título revista abreviado:Polar Sci.
ISSN:18739652
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18739652_v15_n_p39_Daglio

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Citas:

---------- APA ----------
Daglio, Y., Sacristán, H., Ansaldo, M. & Rodríguez, M.C. (2018) . Benthic diatoms from Potter Cove, 25 de Mayo (King George) Island, Antarctica: Mucilage and glucan storage as a C-source for limpets. Polar Science, 15, 39-48.
http://dx.doi.org/10.1016/j.polar.2018.01.004
---------- CHICAGO ----------
Daglio, Y., Sacristán, H., Ansaldo, M., Rodríguez, M.C. "Benthic diatoms from Potter Cove, 25 de Mayo (King George) Island, Antarctica: Mucilage and glucan storage as a C-source for limpets" . Polar Science 15 (2018) : 39-48.
http://dx.doi.org/10.1016/j.polar.2018.01.004
---------- MLA ----------
Daglio, Y., Sacristán, H., Ansaldo, M., Rodríguez, M.C. "Benthic diatoms from Potter Cove, 25 de Mayo (King George) Island, Antarctica: Mucilage and glucan storage as a C-source for limpets" . Polar Science, vol. 15, 2018, pp. 39-48.
http://dx.doi.org/10.1016/j.polar.2018.01.004
---------- VANCOUVER ----------
Daglio, Y., Sacristán, H., Ansaldo, M., Rodríguez, M.C. Benthic diatoms from Potter Cove, 25 de Mayo (King George) Island, Antarctica: Mucilage and glucan storage as a C-source for limpets. Polar Sci. 2018;15:39-48.
http://dx.doi.org/10.1016/j.polar.2018.01.004