Search

Your search keyword '"Romano, Giovanna"' showing total 485 results
Start Over Author "Romano, Giovanna"
485 results on '"Romano, Giovanna"'

102. Valutazione, ranking delle università e opinabilità dei risultati. Spunti dalla comparazione tra i sistemi HEEACT, ARWU, e THE-Q

Author

Guiselin, Emmanuel Pie, Sciascio, Alessandro di, Police, Aristide, Renard Biancotto, Stéphanie, Gregoriis, Lorenzo De, Mignot Gérard, Stéphanie, Guyon, Laurence, Dipace, Ruggiero, Cimini, Salvatore, Carriére, Bernard, Picozza, Eugenio, Boyer, Vincent, Colombini, Giovanna, Giulietti, Walter, Romano, Giovanna, Baslé, Maurice, D'Orsogna, Marina, Giani, Loredana, Medori, Andrea, Iacopino, Annarita, and Fialaire, Jacque

Subjects
Valutazione, Ranking, Università
Published
2013

103. Centropages typicus (Crustacea, Copepoda) reacts to volatile compounds produced by planktonic algae

Author

Maibam, Chingoileima, Fink, Patrick, Romano, Giovanna, Buia, Maria Cristina, Butera, Emanuela, Zupo, Valerio, Maibam, Chingoileima, Fink, Patrick, Romano, Giovanna, Buia, Maria Cristina, Butera, Emanuela, and Zupo, Valerio

Abstract

Volatile organic compounds (VOCs) may play the role of infochemicals and trigger chemotaxis and ecologically relevant responses in freshwater and marine invertebrates. Aquatic grazers use these signals as chemical cues to trace the presence of their food or to detect their predators. However, detailed data are still needed to fully understand the role of these relationships in marine plankton. We investigated the ability of the copepod Centropages typicus to perceive the odour of three planktonic diatoms (Skeletonema marinoi, Pseudonitzschia delicatissima and Chaetoceros affinis) and a dinoflagellate (Prorocentrum minimum). This information is ecologically relevant for orientation, habitat selection, predator avoidance and communication. In addition, as the pH of the medium influences the perception of chemical cues in aquatic environments, we tested the effect of seawater acidification resulting from increasing levels of CO2, and its influences on the olfactory reactions of copepods. For this reason, our tests were repeated in normal (pH 8.10) and acidified (pH 7.76) seawater in order to simulate future ocean acidification scenarios. Using replicated chemokinetic assays we demonstrated that VOCs produced by Ps.delicatissima and Pr.minimum attract copepods at normal pH, but this effect is lowered in acidified water. By contrast, the odour of S.marinoi mainly induces a reaction of repulsion, but in acidified water and at higher concentrations this toxic diatom becomes attractive for copepods. Our experiments demonstrate, for the first time, that copepods are sensitive to the volatile compounds contained in various microalgae; VOCs prompt chemokinesis according to algal species and odour concentrations. However, seawater acidification induces changes in copepods' perception of odours. These findings highlight the sensitivity of chemically mediated interactions to global changes

Published
2015

113. The Marine Microbial Eukaryote Transcriptome Sequencing Project (MMETSP) : illuminating the functional diversity of eukaryotic life in the oceans through transcriptome sequencing

Author

Keeling, Patrick J., Burki, Fabien, Wilcox, Heather M., Allam, Bassem, Allen, Eric E., Amaral-Zettler, Linda A., Armbrust, E. Virginia, Archibald, John M., Bharti, Arvind K., Bell, Callum J., Beszteri, Bank, Bidle, Kay D., Cameron, Connor T., Campbell, Lisa, Caron, David A., Cattolico, Rose Ann, Collier, Jackie L., Coyne, Kathryn J., Davy, Simon K., Deschamps, Phillipe, Dyhrman, Sonya T., Edvardsen, Bente, Gates, Ruth D., Gobler, Christopher J., Greenwood, Spencer J., Guida, Stephanie M., Jacobi, Jennifer L., Jakobsen, Kjetill S., James, Erick R., Jenkins, Bethany D., John, Uwe, Johnson, Matthew D., Juhl, Andrew R., Kamp, Anja, Katz, Laura A., Kiene, Ronald P., Kudryavtsev, Alexander N., Leander, Brian S., Lin, Senjie, Lovejoy, Connie, Lynn, Denis, Marchetti, Adrian, McManus, George, Nedelcu, Aurora M., Menden-Deuer, Susanne, Miceli, Cristina, Mock, Thomas, Montresor, Marina, Moran, Mary Ann, Murray, Shauna A., Nadathur, Govind, Nagai, Satoshi, Ngam, Peter B., Palenik, Brian, Pawlowski, Jan, Petroni, Giulio, Piganeau, Gwenael, Posewitz, Matthew C., Rengefors, Karin, Romano, Giovanna, Rumpho, Mary E., Rynearson, Tatiana A., Schilling, Kelly B., Schroeder, Declan C., Simpson, Alastair G. B., Slamovits, Claudio H., Smith, David R., Smith, G. Jason, Smith, Sarah R., Sosik, Heidi M., Stief, Peter, Theriot, Edward, Twary, Scott N., Umale, Pooja E., Vaulot, Daniel, Wawrik, Boris, Wheeler, Glen L., Wilson, William H., Xu, Yan, Zingone, Adriana, Worden, Alexandra Z., Keeling, Patrick J., Burki, Fabien, Wilcox, Heather M., Allam, Bassem, Allen, Eric E., Amaral-Zettler, Linda A., Armbrust, E. Virginia, Archibald, John M., Bharti, Arvind K., Bell, Callum J., Beszteri, Bank, Bidle, Kay D., Cameron, Connor T., Campbell, Lisa, Caron, David A., Cattolico, Rose Ann, Collier, Jackie L., Coyne, Kathryn J., Davy, Simon K., Deschamps, Phillipe, Dyhrman, Sonya T., Edvardsen, Bente, Gates, Ruth D., Gobler, Christopher J., Greenwood, Spencer J., Guida, Stephanie M., Jacobi, Jennifer L., Jakobsen, Kjetill S., James, Erick R., Jenkins, Bethany D., John, Uwe, Johnson, Matthew D., Juhl, Andrew R., Kamp, Anja, Katz, Laura A., Kiene, Ronald P., Kudryavtsev, Alexander N., Leander, Brian S., Lin, Senjie, Lovejoy, Connie, Lynn, Denis, Marchetti, Adrian, McManus, George, Nedelcu, Aurora M., Menden-Deuer, Susanne, Miceli, Cristina, Mock, Thomas, Montresor, Marina, Moran, Mary Ann, Murray, Shauna A., Nadathur, Govind, Nagai, Satoshi, Ngam, Peter B., Palenik, Brian, Pawlowski, Jan, Petroni, Giulio, Piganeau, Gwenael, Posewitz, Matthew C., Rengefors, Karin, Romano, Giovanna, Rumpho, Mary E., Rynearson, Tatiana A., Schilling, Kelly B., Schroeder, Declan C., Simpson, Alastair G. B., Slamovits, Claudio H., Smith, David R., Smith, G. Jason, Smith, Sarah R., Sosik, Heidi M., Stief, Peter, Theriot, Edward, Twary, Scott N., Umale, Pooja E., Vaulot, Daniel, Wawrik, Boris, Wheeler, Glen L., Wilson, William H., Xu, Yan, Zingone, Adriana, and Worden, Alexandra Z.

Abstract

© The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in PLoS Biology 12 (2014): e1001889, doi:10.1371/journal.pbio.1001889., Microbial ecology is plagued by problems of an abstract nature. Cell sizes are so small and population sizes so large that both are virtually incomprehensible. Niches are so far from our everyday experience as to make their very definition elusive. Organisms that may be abundant and critical to our survival are little understood, seldom described and/or cultured, and sometimes yet to be even seen. One way to confront these problems is to use data of an even more abstract nature: molecular sequence data. Massive environmental nucleic acid sequencing, such as metagenomics or metatranscriptomics, promises functional analysis of microbial communities as a whole, without prior knowledge of which organisms are in the environment or exactly how they are interacting. But sequence-based ecological studies nearly always use a comparative approach, and that requires relevant reference sequences, which are an extremely limited resource when it comes to microbial eukaryotes. In practice, this means sequence databases need to be populated with enormous quantities of data for which we have some certainties about the source. Most important is the taxonomic identity of the organism from which a sequence is derived and as much functional identification of the encoded proteins as possible. In an ideal world, such information would be available as a large set of complete, well-curated, and annotated genomes for all the major organisms from the environment in question. Reality substantially diverges from this ideal, but at least for bacterial molecular ecology, there is a database consisting of thousands of complete genomes from a wide range of taxa, supplemented by a phylogeny-driven approach to diversifying genomics. For eukaryotes, the number of available genomes is far, far fewer, and we have relied much more heavily on random growth of sequence databases, raising the question as to whether this is fit for purpose., This project was funded by the Gordon and Betty Moore Foundation (GBMF; Grants GBMF2637 and GBMF3111) to the National Center for Genome Resources (NCGR) and the National Center for Marine Algae and Microbiota (NCMA).

Published
2014

116. The Relevance of Marine Chemical Ecology to Plankton and Ecosystem Function : An Emerging Field

Author

Ianora, Adrianna, Bentley, Matthew G, Caldwell, Gary S, Casotti, Rafaella, Cembella, Allan D, Engström Öst, Jonna, Halsband, Claudia, Sonnenschein, Eva, Legrand, Catherine, Llewellyn, Carole, Paldaviciene, Aiste, Pilkaityte, Renata, Pohnert, Georg, Razinkovas, Arthur, Romano, Giovanna, Tillmann, Urban, Vaiciute, Diana, Ianora, Adrianna, Bentley, Matthew G, Caldwell, Gary S, Casotti, Rafaella, Cembella, Allan D, Engström Öst, Jonna, Halsband, Claudia, Sonnenschein, Eva, Legrand, Catherine, Llewellyn, Carole, Paldaviciene, Aiste, Pilkaityte, Renata, Pohnert, Georg, Razinkovas, Arthur, Romano, Giovanna, Tillmann, Urban, and Vaiciute, Diana

Abstract

Marine chemical ecology comprises the study of the production and interaction of bioactive molecules affecting organism behavior and function. Here we focus on bioactive compounds and interactions associated with phytoplankton, particularly bloom-forming diatoms, prymnesiophytes and dinoflagellates. Planktonic bioactive metabolites are structurally and functionally diverse and some may have multiple simultaneous functions including roles in chemical defense (antipredator, allelopathic and antibacterial compounds), and/or cell-to-cell signaling (e.g., polyunsaturated aldehydes (PUAs) of diatoms). Among inducible chemical defenses in response to grazing, there is high species-specific variability in the effects on grazers, ranging from severe physical incapacitation and/or death to no apparent physiological response, depending on predator susceptibility and detoxification capability. Most bioactive compounds are present in very low concentrations, in both the producing organism and the surrounding aqueous medium. Furthermore, bioactivity may be subject to synergistic interactions with other natural and anthropogenic environmental toxicants. Most, if not all phycotoxins are classic secondary metabolites, but many other bioactive metabolites are simple molecules derived from primary metabolism (e.g., PUAs in diatoms, dimethylsulfoniopropionate (DMSP) in prymnesiophytes). Producing cells do not seem to suffer physiological impact due to their synthesis. Functional genome sequence data and gene expression analysis will provide insights into regulatory and metabolic pathways in producer organisms, as well as identification of mechanisms of action in target organisms. Understanding chemical ecological responses to environmental triggers and chemically-mediated species interactions will help define crucial chemical and molecular processes that help maintain biodiversity and ecosystem functionality., ALGBACT

Published
2011
Full Text
View/download PDF

119. First Morphological and Molecular Evidence of the Negative Impact of Diatom-Derived Hydroxyacids on the Sea Urchin Paracentrotus lividus.

Author

Varrella, Stefano, Romano, Giovanna, Ruocco, Nadia, Ianora, Adrianna, Bentley, Matt G., and Costantini, Maria

Subjects
*HYDROXY acids, *SEA urchins, *LIPOXYGENASES, *MOLECULAR biology, *DIATOMS, *OXYLIPINS
Abstract

Oxylipins (including polyunsaturated aldehydes [PUAs], hydoxyacids, and epoxyalcohols) are the end-products of a lipoxygenase/hydroperoxide lyase metabolic pathway in diatoms. To date, very little information is available on oxylipins other than PUAs, even though they represent the most common oxylipins produced by diatoms. Here, we report, for the first time, on the effects of 2 hydroxyacids, 5- and 15-HEPE, which have never been tested before, using the sea urchin Paracentrotus lividus as a model organism. We show that HEPEs do induce developmental malformations but at concentrations higher when compared with PUAs. Interestingly, HEPEs also induced a marked developmental delay in sea urchin embryos, which has not hitherto been reported for PUAs. Recovery experiments revealed that embryos do not recover following treatment with HEPEs. Finally, we report the expression levels of 35 genes (involved in stress, development, differentiation, skeletogenesis, and detoxification processes) to identify the molecular targets affected by HEPEs. We show that the 2 HEPEs have very few common molecular targets, specifically affecting different classes of genes and at different times of development. In particular, 15-HEPE switched on fewer genes than 5-HEPE, upregulating mainly stress-related genes at a later pluteus stage of development. 5-HEPE was stronger than 15-HEPE, targeting 24 genes, mainly at the earliest stages of embryo development (at the blastula and swimming blastula stages). These findings highlight the differences between HEPEs and PUAs and also have important ecological implications because many diatom species do not produce PUAs, but rather these other chemicals are derived from the oxidation of fatty acids. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

120. Epignathus: Two cases

Author

da Silva Freitas, Renato, Alonso, Nivaldo, de Freitas Azzolini, Thais, Gianini-Romano, Giovanna, Tolazzi, André Ricardo Dall’Oglio, Busato, Luciano, and Grande, César Vinicius

Published
2008
Full Text
View/download PDF

126. The Relevance of Marine Chemical Ecology to Plankton and Ecosystem Function: An Emerging Field

Author

Ianora, Adrianna, primary, Bentley, Matthew G., additional, Caldwell, Gary S., additional, Casotti, Raffaella, additional, Cembella, Allan D., additional, Engström-Öst, Jonna, additional, Halsband, Claudia, additional, Sonnenschein, Eva, additional, Legrand, Catherine, additional, Llewellyn, Carole A., additional, Paldavičienë, Aistë, additional, Pilkaityte, Renata, additional, Pohnert, Georg, additional, Razinkovas, Arturas, additional, Romano, Giovanna, additional, Tillmann, Urban, additional, and Vaiciute, Diana, additional

Published
2011
Full Text
View/download PDF

134. Anti-Inflammatory Effects of a Methanol Extract from the Marine Sponge Geodia cydonium on the Human Breast Cancer MCF-7 Cell Line.

Author

Costantini, Susan, Romano, Giovanna, Rusolo, Fabiola, Capone, Francesca, Guerriero, Eliana, Colonna, Giovanni, Ianora, Adrianna, Ciliberto, Gennaro, and Costantini, Maria

Subjects
*ANTI-inflammatory agents, *SPONGES (Invertebrates), *METHANOL, *BREAST cancer treatment, *CANCER cell analysis, *ANTINEOPLASTIC agents
Abstract

Many research groups are working to find new possible anti-inflammatory molecules, and marine sponges represent a rich source of biologically active compounds with pharmacological applications. In the present study, we tested different concentrations of the methanol extract from the marine sponge, Geodia cydonium, on normal human breast epithelial cells (MCF-10A) and human breast cancer cells (MCF-7). Our results show that this extract has no cytotoxic effects on both cell lines whereas it induces a decrease in levels of VEGF and five proinflammatory cytokines (CCL2, CXCL8, CXCL10, IFN-γ, and TNF-α) only in MCF-7 cells in a dose-dependent manner, thereby indicating an anti-inflammatory effect. Moreover, interactomic analysis suggests that all six cytokines are involved in a network and are connected with some HUB nodes such as NF-kB subunits and ESR1 (estrogen receptor 1). We also report a decrease in the expression of two NFKB1 and c-Rel subunits by RT-qPCR experiments only in MCF-7 cells after extract treatment, confirming NF-kB inactivation. These data highlight the potential of G. cydonium for future drug discovery against major diseases, such as breast cancer. [ABSTRACT FROM AUTHOR]

Published
2015
Full Text
View/download PDF

137. Cover Picture: Phospholipases and Galactolipases Trigger Oxylipin-Mediated Wound-Activated Defence in the Red Alga Gracilaria chilensis against Epiphytes / Chloroplastic Glycolipids Fuel Aldehyde Biosynthesis in the Marine Diatom Thalassiosira rotula (Che

Author

Lion, Ulrich, primary, Wiesemeier, Theresa, additional, Weinberger, Florian, additional, Beltrán, Jessica, additional, Flores, Verónica, additional, Faugeron, Sylvain, additional, Correa, Juan, additional, Pohnert, Georg, additional, Cutignano, Adele, additional, d'Ippolito, Giuliana, additional, Romano, Giovanna, additional, Lamari, Nadia, additional, Cimino, Guido, additional, Febbraio, Ferdinando, additional, Nucci, Roberto, additional, and Fontana, Angelo, additional

Published
2006
Full Text
View/download PDF

147. Human dbl proto-oncogene in 85 kb of Xq26, and determination of the transcription initiation site

Author

Palmieri, Giuseppe, primary, de Franciscis, Vittorio, additional, Casamassimi, Amelia, additional, Romano, Giovanna, additional, Torino, Anna, additional, Pingitore, Paola, additional, Califano, Daniela, additional, Santelli, Giovanni, additional, Eva, Alessandra, additional, Vecchio, Giancarlo, additional, D'Urso, Michele, additional, and Ciccodicola, Alfredo, additional

Published
2000
Full Text
View/download PDF

150. YAC Contig Organization and CpG Island Analysis in Xq28

Author

Palmieri, Giuseppe, primary, Romano, Giovanna, additional, Ciccodicola, Alfredo, additional, Casamassimi, Amelia, additional, Campanile, Ciro, additional, Esposito, Teresa, additional, Cappa, Vittorio, additional, Lania, Arturo, additional, Johnson, Sandra, additional, Reinbold, Rolland, additional, Poustka, Annemarie, additional, Schlessinger, David, additional, and D'Urso, Michele, additional

Published
1994
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results