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Your search keyword '"Chaetoceros decipiens"' showing total 3 results
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3 results on '"Chaetoceros decipiens"'

1. Nutrient consumption and chain tuning in diatoms exposed to storm-like turbulence

Author

Gianluca Dell'Aquila, Maurizio Ribera d'Alcalà, Daniele Iudicone, Marco Gherardi, Marco Cosentino Lagomarsino, Alberto Amato, Mariella I. Ferrante, Sezione Ecologia Marina Integrata, Stazione Zoologica Anton Dohrn, Biologie Computationnelle et Quantitative = Laboratory of Computational and Quantitative Biology (LCQB), Institut de Biologie Paris Seine (IBPS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica, Università degli studi di Milano, National Institute for Nuclear Physics (INFN)-Università degli studi di Milano [Milano], Physiologie cellulaire et végétale (LPCV), Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Flagship project RITMARE (Ricerca ITaliana per il MARE, Italian Research for the Sea), European Project: 600407,EC:FP7:PEOPLE,FP7-PEOPLE-2012-COFUND,BANDIERA(2013), Stazione Zoologica Anton Dohrn (SZN), Università degli Studi di Milano = University of Milan (UNIMI), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Italian Ministry of Education, University and Research within the National Research Program, RITMARE Flagship Project, Università degli Studi di Milano [Milano] (UNIMI), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, 010504 meteorology & atmospheric sciences, Algae, PH, Nutrient depletion, Science, [SDV]Life Sciences [q-bio], chemistry.chemical_element, Ecological succession, Atmospheric sciences, 01 natural sciences, [SDV.MP.PRO]Life Sciences [q-bio]/Microbiology and Parasitology/Protistology, Article, Cell growth, Nutrient, Phytoplankton, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Chaetoceros decipiens, 0105 earth and related environmental sciences, Multidisciplinary, biology, phytoplancton, Ecology, Turbulence, 010604 marine biology & hydrobiology, Phosphorus, turbulence, Community structure, Diatom, 15. Life on land, biology.organism_classification, chemistry, 13. Climate action, Turbulence effects, Medicine, Autre (Sciences du Vivant)
Abstract

Current information on the response of phytoplankton to turbulence is linked to cell size and nutrient availability. Diatoms are considered to be favored by mixing as dissolved nutrients are more easily accessible for non-motile cells. We investigated how diatoms exploit microscale turbulence under nutrient repletion and depletion conditions. Here, we show that the chain-forming diatom Chaetoceros decipiens, continues to take up phosphorus and carbon even when silicon is depleted during turbulence. Our findings indicate that upon silica depletion, during turbulence, chain spectra of C. decipiens remained unchanged. We show here that longer chains are maintained during turbulence upon silica depletion whereas under still conditions, shorter chains are enriched. We interpret this as a sign of good physiological state leading to a delay of culture senescence. Our results show that C. decipiens senses and responds to turbulence both in nutrient repletion and depletion. This response is noteworthy due to the small size of the species. The coupling between turbulence and biological response that we depict here may have significant ecological implications. Considering the predicted increase of storms in Northern latitudes this response might modify community structure and succession. Our results partly corroborate Margalef’s mandala and provide additional explanations for that conceptualization.

Published
2017

2. Regulation of chain length in two diatoms as a growth-fragmentation process

Author

Marco Cosentino Lagomarsino, Daniele Iudicone, Soizic Cheminant, Jean-Pierre Bouly, Marco Gherardi, Maria Immacolata Ferrante, Maurizio Ribera d'Alcalà, Angela Falciatore, Alberto Amato, Biologie Computationnelle et Quantitative = Laboratory of Computational and Quantitative Biology (LCQB), Institut de Biologie Paris Seine (IBPS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Università degli studi di Milano [Milano], I.N.F.N. Istituto Nazionale di Fisica Nucleare, Institut Jacques Monod (IJM (UMR_7592)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Stazione Zoologica di Napoli (SZN), Stazione Zoologica di Napoli, Stazione Zoologica Anton Dohrn, EC FP7-People COFUND [600407], MIUR Italian Flagship Project RITMARE (Ricerca Italiana per il MARE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano = University of Milan (UNIMI), Stazione Zoologica Anton Dohrn (SZN), and Università degli Studi di Milano [Milano] (UNIMI)

Subjects
Diatoms, 0301 basic medicine, [SDV]Life Sciences [q-bio], Biology, biology.organism_classification, Chaetoceros decipiens, Models, Biological, 03 medical and health sciences, Chain length, 030104 developmental biology, Chain formation, Ecosystem, Phaeodactylum tricornutum, Biological system
Abstract

International audience; Chain formation in diatoms is relevant because of several aspects of their adaptation to the ecosystem. However, the tools to quantify the regulation of their assemblage and infer specific mechanisms in a laboratory setting are scarce. To address this problem, we define an approach based on a statistical physics model of chain growth and separation in combination with experimental evaluation of chain-length distributions. Applying this combined analysis to data from Chaetoceros decipiens and Phaeodactylum tricornutum, we find that cells of the first species control chain separation, likely through a cell-to-cell communication process, while the second species only modulates the separation rate. These results promote quantitative methods for characterizing chain formation in several chain-forming species and in diatoms in particular.

Published
2016

3. Marine diatoms change their gene expression profile when exposed to microscale turbulence under nutrient replete conditions

Author

Francesco Musacchia, Daniele Iudicone, Rossella Annunziata, Maurizio Ribera d'Alcalà, Gianluca Dell'Aquila, Maria Immacolata Ferrante, Remo Sanges, Ari Ugarte, Alessandra Carbone, Nicolas Maillet, Alberto Amato, Paul Scherrer Institute (PSI), Sezione Ecologia Marina Integrata, Stazione Zoologica Anton Dohrn (SZN), Biologie Computationnelle et Quantitative = Laboratory of Computational and Quantitative Biology (LCQB), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Biologie Paris Seine (IBPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Flagship project RITMARE (Ricerca ITaliana per il MARE, Italian Research for the Sea), Italian Ministry of Education, University and Research within the National Research Program, European Union under RITMARE Flagship Project, Institut Universitaire de France, ANR [ANR-11-LABX-0037-01] , [ANR-11-IDEX-0004-02], ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), European Project: 600407,EC:FP7:PEOPLE,FP7-PEOPLE-2012-COFUND,BANDIERA(2013), Physiologie cellulaire et végétale (LPCV), Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Stazione Zoologica Anton Dohrn, Institut de Biologie Paris Seine (IBPS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), ANR-11-IDEX-0004-02/11-LABX-0037,CALSIMLAB,LABEX pour la modélisation et la simulation scientifiques en recherche(2011), Ferrante, Maria I., Sorbonne Université (SU), Physiologie cellulaire et végétale [2016-2019] (LPCV [2016-2019]), and Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG)

Subjects
0106 biological sciences, 0301 basic medicine, Fatty acid biosynthesis, Enzymatic activities, [SDV]Life Sciences [q-bio], diatomée, biosynthèse, Thalassiosira rotula, 01 natural sciences, Nutrient, Settore BIO/13 - Biologia Applicata, Microscale chemistry, Small scale turbulence, Genome, Multidisciplinary, acide gras, analyse morphologique, Turbulence, Ecology, analyse transcriptionnelle, Plankton, Chaetoceros decipiens, Skeletonema marinoi, expression différentielle, Turbulence effects, Ultrastructure, Metabolic pathways, Medicine, Autre (Sciences du Vivant), Morphology, Science, Phytoplankton, Diatom, Chaetoceros decipiens, Thalassiosira rotula, Skeletonema marinoi, Turbulence effects, Morphology, Ultrastructure, Gene expression, Transcriptome, Metabolic pathways, Lipid metabolism, Fatty acid biosynthesis, Enzymatic activities, Biology, Flagellum, Article, 03 medical and health sciences, Phytoplankton, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, 14. Life underwater, Diatoms, phytoplancton, 010604 marine biology & hydrobiology, turbulence, fungi, Diatom, biology.organism_classification, Lipid metabolism, 030104 developmental biology, Gene Expression Regulation, Gene expression, Transcriptome
Abstract

Diatoms are a fundamental microalgal phylum that thrives in turbulent environments. Despite several experimental and numerical studies, if and how diatoms may profit from turbulence is still an open question. One of the leading arguments is that turbulence favours nutrient uptake. Morphological features, such as the absence of flagella, the presence of a rigid exoskeleton and the micrometre size would support the possible passive but beneficial role of turbulence on diatoms. We demonstrate that in fact diatoms actively respond to turbulence in non-limiting nutrient conditions. TURBOGEN, a prototypic instrument to generate natural levels of microscale turbulence, was used to expose diatoms to the mechanical stimulus. Differential expression analyses, coupled with microscopy inspections, enabled us to study the morphological and transcriptional response of Chaetoceros decipiens to turbulence. Our target species responds to turbulence by activating energy storage pathways like fatty acid biosynthesis and by modifying its cell chain spectrum. Two other ecologically important species were examined and the occurrence of a morphological response was confirmed. These results challenge the view of phytoplankton as unsophisticated passive organisms.

Published
2016

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