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Léger-Pigout M, Navarro E, Ménard F, Ruitton S, Le Loc’h F, Guasco S, Munaron JM, Thibault D, Changeux T, Connan S, Stiger-Pouvreau V, Thibaut T, Michotey V. Predominant heterotrophic diazotrophic bacteria are involved in Sargassum proliferation in the Great Atlantic Sargassum Belt. ISME J 2024; 18:wrad026. [PMID: 38365246 PMCID: PMC10833076 DOI: 10.1093/ismejo/wrad026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/27/2023] [Accepted: 12/08/2023] [Indexed: 02/18/2024]
Abstract
Since 2011, the Caribbean coasts have been subject to episodic influxes of floating Sargassum seaweed of unprecedented magnitude originating from a new area "the Great Atlantic Sargassum Belt" (GASB), leading in episodic influxes and mass strandings of floating Sargassum. For the biofilm of both holopelagic and benthic Sargassum as well as in the surrounding waters, we characterized the main functional groups involved in the microbial nitrogen cycle. The abundance of genes representing nitrogen fixation (nifH), nitrification (amoA), and denitrification (nosZ) showed the predominance of diazotrophs, particularly within the GASB and the Sargasso Sea. In both location, the biofilm associated with holopelagic Sargassum harboured a more abundant proportion of diazotrophs than the surrounding water. The mean δ15N value of the GASB seaweed was very negative (-2.04‰), and lower than previously reported, reinforcing the hypothesis that the source of nitrogen comes from the nitrogen-fixing activity of diazotrophs within this new area of proliferation. Analysis of the diversity of diazotrophic communities revealed for the first time the predominance of heterotrophic diazotrophic bacteria belonging to the phylum Proteobacteria in holopelagic Sargassum biofilms. The nifH sequences belonging to Vibrio genus (Gammaproteobacteria) and Filomicrobium sp. (Alphaproteobacteria) were the most abundant and reached, respectively, up to 46.0% and 33.2% of the community. We highlighted the atmospheric origin of the nitrogen used during the growth of holopelagic Sargassum within the GASB and a contribution of heterotrophic nitrogen-fixing bacteria to a part of the Sargassum proliferation.
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Affiliation(s)
- Matéo Léger-Pigout
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Elisabeth Navarro
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Frédéric Ménard
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Sandrine Ruitton
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | | | - Sophie Guasco
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | | | - Delphine Thibault
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Thomas Changeux
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Solène Connan
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
| | | | - Thierry Thibaut
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
| | - Valérie Michotey
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
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2
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Gobert T, Gautier A, Connan S, Rouget ML, Thibaut T, Stiger-Pouvreau V, Waeles M. Trace metal content from holopelagic Sargassum spp. sampled in the tropical North Atlantic Ocean: Emphasis on spatial variation of arsenic and phosphorus. Chemosphere 2022; 308:136186. [PMID: 36041518 DOI: 10.1016/j.chemosphere.2022.136186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/04/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
We document for the first time, the spatial distribution at basin scale (North tropical Atlantic Ocean) of As, P and trace metal (TM) concentrations in the three morphotypes belonging to the two holopelagic species Sargassum natans and S. fluitans and three morphotypes: S. natans VIII, S. natans I and S. fluitans III. These samples collected in the North equatorial current (NEC) and in the subtropical Sargasso Sea (sSS) (∼25°N, 60°W) were also compared to coastal samples collected downwind Guadeloupe Island and on the strand of Martinique (mangrove and beach). Along the studied zonal oceanic transect, the highest values of As (range 120-240 μg g-1, dry weight, dw) were found in the sSS area where primary production is highly limited by phosphorus. At these stations, the P content of Sargassum spp. was minimal (range 500-1000 μg g-1, dw) as well as the content in Cd and Zn known for their nutrient-like oceanic behaviors and distributions very similar to P. This illustrates for the first time in the natural environment, the higher bioaccumulation of arsenic in Sargassum spp. in P-limiting conditions which is due to the competition in the phosphate transporter between arsenate and phosphate. As compared to samples collected at sea, the Sargassum spp. collected in the strand of Martinique had (1) lower As concentrations (typical range 30-45 μg g-1, dw) and (2) much higher Al, Fe, Mn, Cr and Co concentrations, showing a certain ability of Sargassum spp. to be depurated of its As content in the coastal zone following competitive exchange with terrigenous metals.
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Affiliation(s)
- Tristan Gobert
- University of Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France
| | - Ambre Gautier
- University of Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France
| | - Solène Connan
- University of Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France
| | | | - Thierry Thibaut
- Aix Marseille University and Université de Toulon, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, Marseille, France
| | | | - Matthieu Waeles
- University of Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France.
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Buscaglia M, Guérard F, Roquefort P, Aubry T, Fauchon M, Toueix Y, Stiger-Pouvreau V, Hellio C, Le Blay G. Mechanically Enhanced Salmo salar Gelatin by Enzymatic Cross-linking: Premise of a Bioinspired Material for Food Packaging, Cosmetics, and Biomedical Applications. Mar Biotechnol (NY) 2022; 24:801-819. [PMID: 35915285 DOI: 10.1007/s10126-022-10150-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Marine animal by-products of the food industry are a great source of valuable biomolecules. Skins and bones are rich in collagen, a protein with various applications in food, cosmetic, healthcare, and medical industries in its native form or partially hydrolyzed (gelatin). Salmon gelatin is a candidate of interest due to its high biomass production available through salmon consumption, its biodegradability, and its high biocompatibility. However, its low mechanical and thermal properties can be an obstacle for various applications requiring cohesive material. Thus, gelatin modification by cross-linking is necessary. Enzymatic cross-linking by microbial transglutaminase (MTG) is preferred to chemical cross-linking to avoid the formation of potentially cytotoxic residues. In this work, the potential of salmon skin gelatin was investigated, in a comparative study with porcine gelatin, and an enzymatic versus chemical cross-linking analysis. For this purpose, the two cross-linking methods were applied to produce three-dimensional, porous, and mechanically reinforced hydrogels and sponges with different MTG ratios (2%, 5%, and 10% w/w gelatin). Their biochemical, rheological, and structural properties were characterized, as well as the stability of the material, including the degree of syneresis and the water-binding capacity. The results showed that gelatin enzymatically cross-linked produced material with high cross-linking densities over 70% of free amines. The MTG addition seemed to play a crucial role, as shown by the increase in mechanical and thermal resistances with the production of a cohesive material stable above 40 °C for at least 7 days and comparable to porcine and chemically cross-linked gelatins. Two prototypes were obtained with similar thermal resistances but different microstructures and viscoelastic properties, due to different formation dynamics of the covalent network. Considering these results, the enzymatically cross-linked salmon gelatin is a relevant candidate as a biopolymer for the production of matrix for a wide range of biotechnological applications such as food packaging, cosmetic patch, wound healing dressing, or tissue substitute.
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Affiliation(s)
- Manon Buscaglia
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Fabienne Guérard
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Philippe Roquefort
- UMR CNRS 6027, IRDL, Université de Bretagne Occidentale, 29200, Brest, France
| | - Thierry Aubry
- UMR CNRS 6027, IRDL, Université de Bretagne Occidentale, 29200, Brest, France
| | - Marilyne Fauchon
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Yannick Toueix
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | | | - Claire Hellio
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
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Sèbe M, Scemama P, Choquet A, Jung JL, Chircop A, Marras-Aït Razouk P, Michel S, Stiger-Pouvreau V, Recuero-Virto L. Maritime transportation: Let's slow down a bit. Sci Total Environ 2022; 811:152262. [PMID: 34896500 DOI: 10.1016/j.scitotenv.2021.152262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/01/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Maritime transportation is a major contributor to the world economy, but has significant social and environmental impacts. Each impact calls for different technical or operational solutions. Amongst these solutions, we found that speed reduction measures appear to mitigate several issues: (1) collision with wildlife; (2) collision with non-living objects; (3) underwater noise; (4) invasive species; and (5) gas emission. We do not pretend that speed reduction is the best solution for each individual issue mentioned in this paper, but we argue that it could be a key solution to significantly reduce these threats all together. Further interdisciplinary research is required to balance private economic costs of speed reduction measures with environmental and social benefits emerging from all mitigated issues.
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Affiliation(s)
- Maxime Sèbe
- Centre de Recherche en Gestion, Ecole Polytechnique, Paris, France; Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France.
| | - Pierre Scemama
- Unité d'Economie Maritime, UMR 6308 AMURE, Ifremer, Univ Brest, CNRS, IUEM, Plouzané, France
| | - Anne Choquet
- Brest Business School, Brest, France; Univ Brest, Ifremer, CNRS, UMR 6308, AMURE, IUEM, Plouzané, France
| | - Jean-Luc Jung
- Univ Brest, Museum National d'Histoire Naturelle, CNRS, Sorbonne Université, Institut de Systématique Evolution Biodiversité (ISYEB, UMR7205), Brest, France
| | - Aldo Chircop
- Canada Research Chair in Maritime Law and Policy, Schulich School of Law, Dalhousie University, Halifax, Canada
| | | | - Sylvain Michel
- French Agency for Biodiversity, AFB, Le Nadar Hall C, 5 allée Felix Nadar, Vincennes, France
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Roberto VP, Surget G, Le Lann K, Mira S, Tarasco M, Guérard F, Poupart N, Laizé V, Stiger-Pouvreau V, Cancela ML. Antioxidant, Mineralogenic and Osteogenic Activities of Spartina alterniflora and Salicornia fragilis Extracts Rich in Polyphenols. Front Nutr 2021; 8:719438. [PMID: 34485367 PMCID: PMC8416452 DOI: 10.3389/fnut.2021.719438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 07/26/2021] [Indexed: 12/21/2022] Open
Abstract
Osteoporosis is an aging-related disease and a worldwide health issue. Current therapeutics have failed to reduce the prevalence of osteoporosis in the human population, thus the discovery of compounds with bone anabolic properties that could be the basis of next generation drugs is a priority. Marine plants contain a wide range of bioactive compounds and the presence of osteoactive phytochemicals was investigated in two halophytes collected in Brittany (France): the invasive Spartina alterniflora and the native Salicornia fragilis. Two semi-purified fractions, prepared through liquid-liquid extraction, were assessed for phenolic and flavonoid contents, and for the presence of antioxidant, mineralogenic and osteogenic bioactivities. Ethyl acetate fraction (EAF) was rich in phenolic compounds and exhibited the highest antioxidant activity. While S. fragilis EAF only triggered a weak proliferative effect in vitro, S. alterniflora EAF potently induced extracellular matrix mineralization (7-fold at 250 μg/mL). A strong osteogenic effect was also observed in vivo using zebrafish operculum assay (2.5-fold at 10 μg/mL in 9-dpf larvae). Results indicate that polyphenol rich EAF of S. alterniflora has both antioxidant and bone anabolic activities. As an invasive species, this marine plant may represent a sustainable source of molecules for therapeutic applications in bone disorders.
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Affiliation(s)
- Vânia P Roberto
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal
| | - Gwladys Surget
- University of Brest, CNRS, IRD, Ifremer, LEMAR, IUEM, Plouzané, France
| | - Klervi Le Lann
- University of Brest, CNRS, IRD, Ifremer, LEMAR, IUEM, Plouzané, France
| | - Sara Mira
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal
| | - Marco Tarasco
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal
| | - Fabienne Guérard
- University of Brest, CNRS, IRD, Ifremer, LEMAR, IUEM, Plouzané, France
| | - Nathalie Poupart
- University of Brest, CNRS, IRD, Ifremer, LEMAR, IUEM, Plouzané, France
| | - Vincent Laizé
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal.,S2-AQUA - Sustainable and Smart Aquaculture Collaborative Laboratory, Olhão, Portugal
| | | | - M Leonor Cancela
- Centre of Marine Sciences (CCMAR), University of Algarve, Faro, Portugal.,Faculty of Medicine and Biomedical Sciences, University of Algarve, Faro, Portugal.,Algarve Biomedical Center, Faro, Portugal
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6
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Jégou C, Connan S, Bihannic I, Cérantola S, Guérard F, Stiger-Pouvreau V. Phlorotannin and Pigment Content of Native Canopy-Forming Sargassaceae Species Living in Intertidal Rockpools in Brittany (France): Any Relationship with Their Vertical Distribution and Phenology? Mar Drugs 2021; 19:504. [PMID: 34564166 PMCID: PMC8469379 DOI: 10.3390/md19090504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/30/2021] [Accepted: 09/02/2021] [Indexed: 11/16/2022] Open
Abstract
Five native Sargassaceae species from Brittany (France) living in rockpools were surveyed over time to investigate photoprotective strategies according to their tidal position. We gave evidences for the existence of a species distribution between pools along the shore, with the most dense and smallest individuals in the highest pools. Pigment contents were higher in lower pools, suggesting a photo-adaptive process by which the decreasing light irradiance toward the low shore was compensated by a high production of pigments to ensure efficient photosynthesis. Conversely, no xanthophyll cycle-related photoprotective mechanism was highlighted because high levels of zeaxanthin rarely occurred in the upper shore. Phlorotannins were not involved in photoprotection either; only some lower-shore species exhibited a seasonal trend in phlorotannin levels. The structural complexity of phlorotannins appears more to be a taxonomic than an ecological feature: Ericaria produced simple phloroglucinol while Cystoseira and Gongolaria species exhibited polymers. Consequently, tide pools could be considered as light-protected areas on the intertidal zone, in comparison with the exposed emerged substrata where photoprotective mechanisms are essential.
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Affiliation(s)
- Camille Jégou
- Laboratoire de Biotechnologie et Chimie Marine (LBCM) EA 3884, Université de Brest, 6 Rue de l’université, F-29334 Quimper, France;
| | - Solène Connan
- Laboratoire des Sciences de l’Environnement (LEMAR) UMR 6539, Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzane, France; (S.C.); (I.B.); (F.G.)
| | - Isabelle Bihannic
- Laboratoire des Sciences de l’Environnement (LEMAR) UMR 6539, Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzane, France; (S.C.); (I.B.); (F.G.)
| | | | - Fabienne Guérard
- Laboratoire des Sciences de l’Environnement (LEMAR) UMR 6539, Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzane, France; (S.C.); (I.B.); (F.G.)
| | - Valérie Stiger-Pouvreau
- Laboratoire des Sciences de l’Environnement (LEMAR) UMR 6539, Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzane, France; (S.C.); (I.B.); (F.G.)
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Bucciarelli E, Stiger-Pouvreau V, Connan S. A New Protocol Using Acidification for Preserving DMSP in Macroalgae and Comparison with Existing Protocols. J Phycol 2021; 57:689-693. [PMID: 33295639 DOI: 10.1111/jpy.13113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 11/04/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
Dimethylsulfoniopropionate (DMSP) plays many important physiological and ecological roles in macroalgae. The most common method to measure DMSP is by gas chromatography analysis of the dimethylsulfide (DMS) produced after NaOH hydrolysis (pH > 12). Storage of DMS, however, is not recommended for more than a week. We investigated if acidification can be a suitable method to preserve DMSP in macroalgal samples over three months of storage, compared to widely used protocols such as drying and freezing at -20°C. The DMSP content of green (Ulva sp. and Ulva compressa), red (Chondrus crispus), and brown (Bifurcaria bifurcata) macroalgae were analyzed: 24 h after NaOH addition (control values); and after acidification (0.2 mol · L HCl-1 ) for 24 h of fresh material, followed by NaOH addition for 24 h. These values were compared to measurements after 3-month storage of samples that had been either dried in a heater (60°C for a night, and storage at room temperature), or frozen at -20°C, or kept in 0.2 mol · L HCl-1 . There was no significant difference between DMSP measurements on freshly collected material and after acidification of the samples, whether 24 h later or after 3 months of storage. This was in contrast to 3-month storage protocols involving overnight drying at 60°C (75-98% DMSP loss), and to a lesser degree freezing at -20°C (37-80% DMSP loss). We thus advise to acidify macroalgal samples for preservation over long periods of time rather than drying or freezing, when assaying DMSP content.
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Affiliation(s)
- Eva Bucciarelli
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
| | | | - Solène Connan
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
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8
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Devault DA, Modestin E, Cottereau V, Vedie F, Stiger-Pouvreau V, Pierre R, Coynel A, Dolique F. The silent spring of Sargassum. Environ Sci Pollut Res Int 2021; 28:15580-15583. [PMID: 33438121 DOI: 10.1007/s11356-020-12216-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Affiliation(s)
- Damien A Devault
- Département des Sciences et Technologies, Centre Universitaire de Formation et de Recherche de Mayotte, RN3, BP53, 97660, Dembeni, Mayotte, France.
| | - Emma Modestin
- UMR BOREA, BP 7209, 97275, Schœlcher, Martinique, France
| | - Victoire Cottereau
- UMR 7301 MIGRINTER, Université de Poitiers, Bat. A5 - TSA 21103, 5 Rue Théodore Lefebvre, 86073, Poitiers Cedex 9, France
| | - Fabien Vedie
- DEAL Martinique, Route de la Pointe de Jaham, BP7212, 97274, Schœlcher, Martinique, France
| | - Valérie Stiger-Pouvreau
- UMR 6539 LEMAR, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale Technopôle Brest-Iroise, rue Dumont d'Urville, 29280, Plouzané, France
| | - Ronan Pierre
- CEVA, Presqu'île de Pen Lan, 22610, Pleubian, France
| | - Alexandra Coynel
- UMR 5805 EPOC, Université de Bordeaux, Allée Geoffroy Saint-Hilaire, CS 50023, 33615, Pessac Cedex, France
| | - Franck Dolique
- UMR BOREA, BP 7209, 97275, Schœlcher, Martinique, France
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9
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Ody A, Thibaut T, Berline L, Changeux T, André JM, Chevalier C, Blanfuné A, Blanchot J, Ruitton S, Stiger-Pouvreau V, Connan S, Grelet J, Aurelle D, Guéné M, Bataille H, Bachelier C, Guillemain D, Schmidt N, Fauvelle V, Guasco S, Ménard F. From In Situ to satellite observations of pelagic Sargassum distribution and aggregation in the Tropical North Atlantic Ocean. PLoS One 2019; 14:e0222584. [PMID: 31527915 PMCID: PMC6748567 DOI: 10.1371/journal.pone.0222584] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 09/03/2019] [Indexed: 11/18/2022] Open
Abstract
The present study reports on observations carried out in the Tropical North Atlantic in summer and autumn 2017, documenting Sargassum aggregations using both ship-deck observations and satellite sensor observations at three resolutions (MSI-10 m, OLCI-300 m, VIIRS-750 m and MODIS-1 km). Both datasets reported that in summer, Sargassum aggregations were mainly observed off Brazil and near the Caribbean Islands, while they accumulated near the African coast in autumn. Based on in situ observations, we propose a five-class typology allowing standardisation of the description of in situ Sargassum raft shapes and sizes. The most commonly observed Sargassum raft type was windrows, but large rafts composed of a quasi-circular patch hundreds of meters wide were also observed. Satellite imagery showed that these rafts formed larger Sargassum aggregations over a wide range of scales, with smaller aggregations (of tens of m2 area) nested within larger ones (of hundreds of km2). Match-ups between different satellite sensors and in situ observations were limited for this dataset, mainly because of high cloud cover during the periods of observation. Nevertheless, comparisons between the two datasets showed that satellite sensors successfully detected Sargassum abundance and aggregation patterns consistent with in situ observations. MODIS and VIIRS sensors were better suited to describing the Sargassum aggregation distribution and dynamics at Atlantic scale, while the new sensors, OLCI and MSI, proved their ability to detect Sargassum aggregations and to describe their (sub-) mesoscale nested structure. The high variability in raft shape, size, thickness, depth and biomass density observed in situ means that caution is called for when using satellite maps of Sargassum distribution and biomass estimation. Improvements would require additional in situ and airborne observations or very high-resolution satellite imagery.
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Affiliation(s)
- Anouck Ody
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Thierry Thibaut
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Léo Berline
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Thomas Changeux
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Jean-Michel André
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Cristèle Chevalier
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Aurélie Blanfuné
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Jean Blanchot
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Sandrine Ruitton
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Valérie Stiger-Pouvreau
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), LEMAR UMR 6539, Technopôle Brest-Iroise, Plouzané, France
| | - Solène Connan
- Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), LEMAR UMR 6539, Technopôle Brest-Iroise, Plouzané, France
| | - Jacques Grelet
- IRD DR-OUEST, US191 IMAGO, Technopole de Brest-Iroise—Site de la Pointe du Diable, Plouzané, France
| | - Didier Aurelle
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Mathilde Guéné
- Université des Antilles, UMR BOREA, Campus de Fouillole, BP 592, Pointe-à-Pitre, Guadeloupe, France
| | | | - Céline Bachelier
- IRD DR-OUEST, US191 IMAGO, Technopole de Brest-Iroise—Site de la Pointe du Diable, Plouzané, France
| | - Dorian Guillemain
- Aix Marseille Univ, CNRS, IRD, IRSTEA, OSU PYTHEAS, Marseille, France
| | - Natascha Schmidt
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Vincent Fauvelle
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Sophie Guasco
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Frédéric Ménard
- Aix-Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
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Lalegerie F, Lajili S, Bedoux G, Taupin L, Stiger-Pouvreau V, Connan S. Photo-protective compounds in red macroalgae from Brittany: Considerable diversity in mycosporine-like amino acids (MAAs). Mar Environ Res 2019; 147:37-48. [PMID: 31014905 DOI: 10.1016/j.marenvres.2019.04.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/29/2019] [Accepted: 04/01/2019] [Indexed: 05/05/2023]
Abstract
To cope with the biotic and abiotic stresses experienced within their environment, marine macroalgae have developed certain defence mechanisms including the synthesis of photo-protective molecules against light and particularly harmful UV radiation. The aim of this study was to screen selected red algae, a highly diverse phylogenetic group, for the production of photo-protective molecules. The pigment content and composition (i.e. chlorophyll-a, phycobiliproteins and carotenoids) and the composition of mycosporine-like amino acids (MAAs) were studied in 40 species of red macroalgae collected in Brittany (France), at two distinct periods (i.e. February and July 2017). A high inter-specific variability was demonstrated in terms of pigment content and MAA composition. Twenty-three potential MAAs were detected by HPLC, and six were identified by LC-MS (i.e. shinorine, palythine, asterina-330, porphyra-334, usurijene and palythene). This is the first study to report on the composition of pigments and MAAs in a diverse group of red seaweeds from Brittany, including some species for which the MAA composition has never been studied before. Nevertheless, the results suggested that some species of red algae are more likely to cope with high levels of light radiation since those species such as Bostrychia scorpioides, Porphyra dioica, Gracilaria vermiculophylla and Vertebrata lanosa are living in environments exposed to higher levels of irradiation, and had various MAAs in addition to their photo-protective pigments.
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Affiliation(s)
- Fanny Lalegerie
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France.
| | - Sirine Lajili
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France
| | - Gilles Bedoux
- Marine Biotechnology and Chemistry Laboratory (LBCM, EA 3884), University of South Brittany (UBS), 56017, Vannes, France
| | - Laure Taupin
- Marine Biotechnology and Chemistry Laboratory (LBCM, EA 3884), University of South Brittany (UBS), 56017, Vannes, France
| | | | - Solène Connan
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzane, France
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11
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Setyawidati NAR, Puspita M, Kaimuddin AH, Widowati I, Deslandes E, Bourgougnon N, Stiger-Pouvreau V. Seasonal biomass and alginate stock assessment of three abundant genera of brown macroalgae using multispectral high resolution satellite remote sensing: A case study at Ekas Bay (Lombok, Indonesia). Mar Pollut Bull 2018; 131:40-48. [PMID: 29422305 DOI: 10.1016/j.marpolbul.2017.11.068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 06/08/2023]
Abstract
The potential of Indonesian bays as alginate producers was assessed by determining the stock of wild brown algae and exploring their biomass as alginophytes at the scale of entire bay, using a combination of field observations, remote sensing high resolution data and GIS tools. Ekas Bay in Lombok Island presented a stock of brown macroalgae which varied with season and species: for Padina the biomass reached 97.85±12.63 and 79.54±2.53tons in May/June and November respectively; for Sargassaceae species, it reached 669.70±109.64 and 147.70±77.97tons in May/June and November respectively. The best alginate yields occurred during the May/June period: Padina could produce 9.10±0.06tons DW of alginates. Interestingly, Sargassum/Turbinaria together allow 207.61±0.42tons DW of alginates. This study suggests that wild Sargassaceae represent an interesting stock in terms of biomass, alginate yield and M/G ratio.
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Affiliation(s)
- Nur Azmi R Setyawidati
- Agency for Marine Affairs and Fisheries Research and Development, Minister of Marine Affairs and Fisheries, Jl. Pasir Putih 1, Ancol Timur, Jakarta Utara 14430, Indonesia; LEMAR UMR 6539 UBO CNRS Ifremer IRD, European Institute of Marine Studies (IUEM), Université de Bretagne Occidentale (UBO), Technopôle Brest-Iroise, Rue Dumont d'Urville, 29280 Plouzané, France
| | - Maya Puspita
- Faculty of Fisheries and Marine Sciences, Diponegoro University, Jl. Prof. H. Soedharto, SH, Tembalang, Semarang 50275, Indonesia; Laboratoire de Biotechnologie et Chimie Marines, EA3884, Université de Bretagne-Sud (UBS), 56000 Vannes, France
| | - Awaludin H Kaimuddin
- LEMAR UMR 6539 UBO CNRS Ifremer IRD, European Institute of Marine Studies (IUEM), Université de Bretagne Occidentale (UBO), Technopôle Brest-Iroise, Rue Dumont d'Urville, 29280 Plouzané, France
| | - Ita Widowati
- Faculty of Fisheries and Marine Sciences, Diponegoro University, Jl. Prof. H. Soedharto, SH, Tembalang, Semarang 50275, Indonesia
| | - Eric Deslandes
- LEMAR UMR 6539 UBO CNRS Ifremer IRD, European Institute of Marine Studies (IUEM), Université de Bretagne Occidentale (UBO), Technopôle Brest-Iroise, Rue Dumont d'Urville, 29280 Plouzané, France
| | - Nathalie Bourgougnon
- Laboratoire de Biotechnologie et Chimie Marines, EA3884, Université de Bretagne-Sud (UBS), 56000 Vannes, France
| | - Valérie Stiger-Pouvreau
- LEMAR UMR 6539 UBO CNRS Ifremer IRD, European Institute of Marine Studies (IUEM), Université de Bretagne Occidentale (UBO), Technopôle Brest-Iroise, Rue Dumont d'Urville, 29280 Plouzané, France.
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Davoult D, Surget G, Stiger-Pouvreau V, Noisette F, Riera P, Stagnol D, Androuin T, Poupart N. Multiple effects of a Gracilaria vermiculophylla invasion on estuarine mudflat functioning and diversity. Mar Environ Res 2017; 131:227-235. [PMID: 29029761 DOI: 10.1016/j.marenvres.2017.09.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/29/2017] [Accepted: 09/30/2017] [Indexed: 06/07/2023]
Abstract
The invasive Japanese seaweed Gracilaria vermiculophylla has become established over the past several years in numerous European estuaries, from Portugal to Norway. In the Faou estuary (48.295°N-4.179°W, Brittany, France), it forms a dense population at the mud's surface. The effects of G. vermiculophylla on metabolism, diversity, and the food web were studied. Community gross primary production (GPP) and respiration (CR) during emersion, chlorophyll-a content, macrofaunal and meiofaunal diversity and abundance, and stable isotopes (δ13C and δ15N) of representative macrofaunal species and main food sources were measured at low tide in winter, spring, summer 2014, and winter 2015. Results show significant seasonal variation in GPP and CR. Moreover, GPP was significantly higher in areas where G. vermiculophylla was present than in the control area (bare mud). However, this high GPP appeared to be linked to the increase in biomass in primary producers, with their efficiency (primary productivity, i.e. assimilation number) remaining relatively stable compared with the control area. Significant variation in abundance of meiofauna and macrofauna was also detected and new epifaunal species were collected, mainly in Gracilaria-colonized areas. Isotopic food-web Bayesian mixing models strongly suggested that G. vermiculophylla plays a major role in the diet of some dominant species. Mechanisms interacting with the functioning and diversity of the mudflat are discussed. Finally, the invasive seaweed G. vermiculophylla affected the mudflat ecosystem in three ways: as a new primary producer (increase in metabolism), as a habitat-forming species (changes in diversity and abundance of macrofauna and meiofauna), and as a new abundant food source, likely through the detrital pathway.
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Affiliation(s)
- D Davoult
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7144, Station Biologique de Roscoff, F. 29680 Roscoff, France.
| | - G Surget
- Université de Bretagne Occidentale, Institut Universitaire Européen de la Mer, 29280 Plouzané, France; CNRS, UMR 6539 LEMAR-IUEM-UBO, Institut Universitaire Européen de la Mer, 29280 Plouzané, France
| | - V Stiger-Pouvreau
- Université de Bretagne Occidentale, Institut Universitaire Européen de la Mer, 29280 Plouzané, France; CNRS, UMR 6539 LEMAR-IUEM-UBO, Institut Universitaire Européen de la Mer, 29280 Plouzané, France
| | - F Noisette
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7144, Station Biologique de Roscoff, F. 29680 Roscoff, France
| | - P Riera
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7144, Station Biologique de Roscoff, F. 29680 Roscoff, France
| | - D Stagnol
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7144, Station Biologique de Roscoff, F. 29680 Roscoff, France
| | - T Androuin
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7144, Station Biologique de Roscoff, F. 29680 Roscoff, France
| | - N Poupart
- Université de Bretagne Occidentale, Institut Universitaire Européen de la Mer, 29280 Plouzané, France; CNRS, UMR 6539 LEMAR-IUEM-UBO, Institut Universitaire Européen de la Mer, 29280 Plouzané, France
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García-Bueno N, Dumay J, Guerin T, Turpin V, Paillard C, Stiger-Pouvreau V, Pouchus YF, Marín-Atucha AA, Decottignies P, Fleurence J. Seasonal variation in the antivibrio activity of two organic extracts from two red seaweed:Palmaria palmataand the introducedGrateloupia turuturuagainst the abalone pathogenVibrio harveyi. Aquat Living Resour 2016. [DOI: 10.1051/alr/2016003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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14
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Sánchez-Camargo ADP, Montero L, Stiger-Pouvreau V, Tanniou A, Cifuentes A, Herrero M, Ibáñez E. Considerations on the use of enzyme-assisted extraction in combination with pressurized liquids to recover bioactive compounds from algae. Food Chem 2016; 192:67-74. [PMID: 26304321 DOI: 10.1016/j.foodchem.2015.06.098] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 06/26/2015] [Accepted: 06/28/2015] [Indexed: 12/22/2022]
Abstract
Pressurized liquids, PLE, and enzyme-assisted extraction, EAE, have been tested to improve the extraction of phlorotannins from the seaweed Sargassum muticum. Enzymatic treatment with proteases and carbohydrases, alkaline hydrolysis and PLE with ethanol:water as extracting solvent have been studied in terms of extraction yield, total phenolic content and antioxidant activity (TEAC assay). Results demonstrated that the application of PLE alone provided the highest yields and relevant antioxidant activity. An experimental design was employed to further optimize the PLE extraction conditions; optimum parameters included the use of 160 °C and 95% ethanol. Under these conditions, values of 21.9%, 94.0mg gallic acid equivalents g(-1), 5.018 mg phloroglucinol equivalents g(-1) and 1.275 mmol trolox equivalents g(-1) were obtained for extraction yield, total phenols, total phlorotannins and TEAC, respectively. A preliminary chemical characterization by liquid chromatography coupled to mass spectrometry provided insight in terms of the mechanisms involved in the different processes.
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Affiliation(s)
| | - Lidia Montero
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - Valérie Stiger-Pouvreau
- LEMAR UMR CNRS UBO IRD IFREMER 6539, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), Technopôle Brest-Iroise, Rue Dumont d'Urville, Plouzané 29280, France
| | - Anaëlle Tanniou
- LEMAR UMR CNRS UBO IRD IFREMER 6539, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), Technopôle Brest-Iroise, Rue Dumont d'Urville, Plouzané 29280, France
| | - Alejandro Cifuentes
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - Miguel Herrero
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain.
| | - Elena Ibáñez
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
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Montero L, Sánchez-Camargo AP, García-Cañas V, Tanniou A, Stiger-Pouvreau V, Russo M, Rastrelli L, Cifuentes A, Herrero M, Ibáñez E. Anti-proliferative activity and chemical characterization by comprehensive two-dimensional liquid chromatography coupled to mass spectrometry of phlorotannins from the brown macroalga Sargassum muticum collected on North-Atlantic coasts. J Chromatogr A 2016; 1428:115-25. [PMID: 26210109 DOI: 10.1016/j.chroma.2015.07.053] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 06/23/2015] [Accepted: 07/12/2015] [Indexed: 10/23/2022]
Abstract
In the present work, the phlorotannin composition of different Sargassum muticum samples collected at different locations along the North Atlantic coasts as well as the bioactivities related to these components were investigated. After pressurized liquid extraction, the samples collected at the extreme locations of a latitudinal gradient from Portugal and Norway, were found to be the richest on total phenols and, particularly, on phlorotannins, containing up to 148.97 and 5.12mg phloroglucinol equivalents g(-1), respectively. The extracts obtained from these locations were further purified and chemically characterized using a modified HILIC×RP-DAD-MS/MS method. The application of this methodology allowed the tentative identification of a great variability of phlorotannins with different degrees of polymerization (from 3 to 11) and structures, determined for the first time in S. muticum. The most-abundant phlorotannins on these samples were fuhalols, hydroxyfuhalols and phlorethols, showing also particularities and important differences depending on the geographical location. Afterwards, the antiproliferative activity of these extracts against HT-29 adenocarcinoma colon cancer cells was studied. Results revealed that the richest S. muticum samples in terms of total phlorotannins, i.e., those from Norway, presented the highest activity, showing a good cytotoxic potential at concentrations in the medium micromolar range.
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Affiliation(s)
- Lidia Montero
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - Andrea P Sánchez-Camargo
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - Virginia García-Cañas
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - Anaëlle Tanniou
- LEMAR UMR 6539 CNRS UBO IRD IFREMER, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), Technopôle Brest-Iroise, Rue Dumont d'Urville, Plouzané 29280, France
| | - Valérie Stiger-Pouvreau
- LEMAR UMR 6539 CNRS UBO IRD IFREMER, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), Technopôle Brest-Iroise, Rue Dumont d'Urville, Plouzané 29280, France
| | - Mariateresa Russo
- Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, loc. Feo di Vito, 89122 Reggio Calabria, Italy
| | - Luca Rastrelli
- Dipartimento di Farmacia, Università di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Alejandro Cifuentes
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - Miguel Herrero
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain.
| | - Elena Ibáñez
- Laboratory of Foodomics, Institute of Food Science Research (CIAL-CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
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Jégou C, Kervarec N, Cérantola S, Bihannic I, Stiger-Pouvreau V. NMR use to quantify phlorotannins: the case of Cystoseira tamariscifolia, a phloroglucinol-producing brown macroalga in Brittany (France). Talanta 2015; 135:1-6. [PMID: 25640118 DOI: 10.1016/j.talanta.2014.11.059] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 11/19/2014] [Accepted: 11/22/2014] [Indexed: 11/16/2022]
Abstract
Among the most renowned natural products from brown algae, phlorotannins are phloroglucinol polymers that have been extensively studied, both for their biotechnological potential and their interest in chemical ecology. The accurate quantification of these compounds is a key point to understand their role as mediators of chemical defense. In recent years, the Folin-Ciocalteu assay has remained a classic protocol for phlorotannin quantification, even though it frequently leads to over-estimations. Furthermore, the quantification of the whole pool of phlorotannins may not be relevant in ecological surveys. In this study, we propose a rapid (1)H qNMR method for the quantification of phlorotannins. We identified phloroglucinol as the main phenolic compound produced by the brown macroalga Cystoseira tamariscifolia. This monomer was detected in vivo using (1)H HR-MAS spectroscopy. We quantified this molecule through (1)H qNMR experiments using TSP as internal standard. The results are discussed by comparison with a standard Folin-Ciocalteu assay performed on purified extracts. The accuracy and simplicity of qNMR makes this method a good candidate as a standard phlorotannin assay.
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Affiliation(s)
- Camille Jégou
- Laboratoire Universitaire de Biodiversité et d׳Écologie Microbienne (EA 3882), IUT de Quimper, Université de Bretagne Occidentale, 6 rue de l׳Université, 29000 Quimper, France
| | - Nelly Kervarec
- Service commun de Résonance Magnétique Nucléaire, UFR Sciences, Université de Bretagne Occidentale, 6 avenue Victor Le Gorgeu-CS93837, 29238 Brest Cedex 3, France
| | - Stéphane Cérantola
- Service commun de Résonance Magnétique Nucléaire, UFR Sciences, Université de Bretagne Occidentale, 6 avenue Victor Le Gorgeu-CS93837, 29238 Brest Cedex 3, France
| | - Isabelle Bihannic
- Laboratoire des Sciences de l׳Environnement Marin (UMR 6539), Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, rue Dumont d׳Urville, 29280 Plouzané, France
| | - Valérie Stiger-Pouvreau
- Laboratoire des Sciences de l׳Environnement Marin (UMR 6539), Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, rue Dumont d׳Urville, 29280 Plouzané, France.
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Surget G, Stiger-Pouvreau V, Le Lann K, Kervarec N, Couteau C, Coiffard LJ, Gaillard F, Cahier K, Guérard F, Poupart N. Structural elucidation, in vitro antioxidant and photoprotective capacities of a purified polyphenolic-enriched fraction from a saltmarsh plant. Journal of Photochemistry and Photobiology B: Biology 2015; 143:52-60. [DOI: 10.1016/j.jphotobiol.2014.12.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 12/03/2014] [Accepted: 12/11/2014] [Indexed: 10/24/2022]
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18
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Tanniou A, Vandanjon L, Gonçalves O, Kervarec N, Stiger-Pouvreau V. Rapid geographical differentiation of the European spread brown macroalga Sargassum muticum using HRMAS NMR and Fourier-Transform Infrared spectroscopy. Talanta 2015; 132:451-6. [PMID: 25476330 DOI: 10.1016/j.talanta.2014.09.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 08/21/2014] [Accepted: 09/02/2014] [Indexed: 12/13/2022]
Abstract
Two recent techniques based on chemical footprinting analysis, HRMAS NMR and FTIR spectroscopy, were tested on a brown macroalgal model. These powerful and easily-to-use techniques allowed us to discriminate Sargassum muticum specimens collected in five different countries along Atlantic coasts, from Portugal to Norway. HRMAS NMR and FTIR permitted the obtaining of an overview of metabolites produced by the alga. Based on spectra analysis, results allowed us to successfully group the samples according to their geographical origin. HRMAS NMR and FTIR spectroscopy respectively point out the relation between the geographical localization and the chemical composition and demonstrated macromolecules variations regarding to environmental stress. Then, our results are discussed in regard of the powerful of these techniques together with the variability of the main molecules produced by Sargassum muticum along the Atlantic coasts.
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Affiliation(s)
- Anaëlle Tanniou
- LEMAR UMR CNRS UBO IRD IFREMER 6539, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), Technopôle Brest-Iroise, Rue Dumont d׳Urville, Plouzané 29280, France
| | - Laurent Vandanjon
- GEPEA UMR CNRS 6144, Université de Nantes, Laboratoire GEPEA, CRTT, 44602 Saint-Nazaire, France; LBCM EA 3884, Université de Bretagne Sud (UBS), IUEM, Campus de Tohannic, 56000 Vannes, France
| | - Olivier Gonçalves
- GEPEA UMR CNRS 6144, Université de Nantes, Laboratoire GEPEA, CRTT, 44602 Saint-Nazaire, France
| | - Nelly Kervarec
- Service RMN-RPE, UFR Sciences et Techniques, Université de Bretagne Occidentale (UBO), Avenue Le Gorgeu, 29200 Brest, France
| | - Valérie Stiger-Pouvreau
- LEMAR UMR CNRS UBO IRD IFREMER 6539, Université de Bretagne Occidentale (UBO), Institut Universitaire Européen de la Mer (IUEM), Technopôle Brest-Iroise, Rue Dumont d׳Urville, Plouzané 29280, France.
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Stiger-Pouvreau V, Thouzeau G. Marine Species Introduced on the French Channel-Atlantic Coasts: A Review of Main Biological Invasions and Impacts. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/oje.2015.55019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
The interest in the physiological roles and bioactivities of plant phenols has increased over the past decades. In seaweeds, many investigations have dealt with phenolic compounds of Phaeophyceae (phlorotannins), even though little is known so far about the ecophysiological variations of their pool or their biosynthetic pathways. We describe here a simple procedure based on the use of water-organic solvent mixtures for the extraction of phlorotannins. Crude extracts are semi-purified and fractionated by separating methods based on both the polarity and the molecular size of compounds. Phenols are then quantified by the Folin-Ciocalteu method and their radical-scavenging activity is characterized using the DPPH test. All along the purification process of phenolic compounds, the efficiency of separation is assessed by (1)H-NMR.
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Affiliation(s)
- Erwan Ar Gall
- LEMAR-UMR6539, IUEM, str. Dumont D'Urville, Plouzané, Brittany, 29280, France,
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García-Bueno N, Decottignies P, Turpin V, Dumay J, Paillard C, Stiger-Pouvreau V, Kervarec N, Pouchus YF, Marín-Atucha AA, Fleurence J. Seasonal antibacterial activity of two red seaweeds,PalmariapalmataandGrateloupia turuturu, on European abalone pathogenVibrio harveyi. Aquat Living Resour 2014. [DOI: 10.1051/alr/2014009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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22
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Le Lann K, Kraffe E, Kervarec N, Cerantola S, Payri CE, Stiger-Pouvreau V. Isolation of turbinaric acid as a chemomarker of Turbinaria conoides (J. Agardh) Kützing from South Pacific Islands. J Phycol 2014; 50:1048-1057. [PMID: 26988786 DOI: 10.1111/jpy.12235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/27/2014] [Indexed: 06/05/2023]
Abstract
Several species of the genus Turbinaria coexist along the coasts of islands in the Indian and Pacific Oceans. Among these brown algae, Turbinaria ornata and T. conoides are sister species that are difficult to differentiate using exclusively morphological characters. Based on in vivo nuclear magnetic resonance and chromatographic techniques, i.e., liquid and gas chromatography-mass spectrometry analysis, combined with phylogenetic data, we successfully identified turbinaric acid in T. conoides samples from several Indian and Pacific Ocean islands. This nonvariable discriminant molecule was only identified in T. conoides specimens, but not in the two allied species T. ornata and T. decurrens. Results are discussed with regard to turbinaric acid as an interesting chemomarker isolated from T. conoides and the rapid discrimination of Turbinaria specimens using chemical assays.
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Affiliation(s)
- Klervi Le Lann
- LEMAR UMR 6539 UBO CNRS IRD, European Institute of Marine Studies (IUEM), University of Western Brittany (UBO), European University of Brittany (UEB), Technopôle Brest-Iroise, Plouzané, 29280, France
| | - Edouard Kraffe
- LEMAR UMR 6539 UBO CNRS IRD, European Institute of Marine Studies (IUEM), University of Western Brittany (UBO), European University of Brittany (UEB), Technopôle Brest-Iroise, Plouzané, 29280, France
| | - Nelly Kervarec
- RMN-RPE-SM, 6 avenue, Victor-Le-Gorgeu-CS93837, Brest Cedex 3, 29238, France
| | - Stéphane Cerantola
- RMN-RPE-SM, 6 avenue, Victor-Le-Gorgeu-CS93837, Brest Cedex 3, 29238, France
| | - Claude Elisabeth Payri
- UMR 7138 Systématique, Adaptation, Evolution, IRD, B.P. A5, Nouméa Cedex, 98848, Nouvelle-Calédonie
- UPF, French Polynesia
| | - Valérie Stiger-Pouvreau
- LEMAR UMR 6539 UBO CNRS IRD, European Institute of Marine Studies (IUEM), University of Western Brittany (UBO), European University of Brittany (UEB), Technopôle Brest-Iroise, Plouzané, 29280, France
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Le Bris C, Paillard C, Stiger-Pouvreau V, Guérard F. Laccase-like activity in the hemolymph of Venerupis philippinarum: characterization and kinetic properties. Fish Shellfish Immunol 2013; 35:1804-12. [PMID: 24075997 DOI: 10.1016/j.fsi.2013.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 08/28/2013] [Accepted: 09/02/2013] [Indexed: 02/05/2023]
Abstract
The phenoloxidases (POs) include tyrosinases (EC 1.14.18.1), catecholases (EC 1.10.3.1) and laccases (EC 1.10.3.2) and are known to play a role in the immune defences of many invertebrates. For the Manila clam, Venerupis philippinarum, the exact role is not known, especially with regard to defences against Brown Ring Disease (BRD), which leads to high mortalities along European coasts. In order to understand the role and functioning of PO in V. philippinarum, the first step, and aim of this study, was to biochemically characterize the PO activity in the circulating hemolymph. Various substrates were tested and the common PO substrates L-DOPA, Catechol and dopamine exhibited good affinity with the enzyme and consequent low K(m) values (3.75, 1.97, 4.91 mM, respectively). A single tyrosinase-specific substrate, PHPPA, was oxidized, but the affinity for it was low (K(m) = 47.33 mM). Three tested laccase-specific substrates were oxidized by V. philippinarum PO (PPD, OPD and hydroquinone) and affinity was higher than for PHPPA. The results obtained with the substrate were confirmed by the use of different inhibitors: CTAB, a laccase-specific inhibitor inhibited PO activity greatly but not completely, whereas 4-Hr, specific to catecholases and tyrosinases, inhibited PO activity to a lesser extent. The results lead us to conclude that V. philippinarum PO activity in the circulating hemolymph, is mainly a laccase-like activity but there is also a smaller-scale tyrosinase-like activity. The inhibition mechanisms were also determined using dose-response substrate concentration for an inhibitor concentration equal or close to the IC50. Optimal conditions for the enzyme activity were also determined using L-DOPA as substrate, showing that its optimal temperature and pH are around 40 °C and 8.4 respectively. The enzyme is denatured for temperatures above 50 °C.
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Affiliation(s)
- Cédric Le Bris
- UMR 6539 CNRS UBO IRD IFREMER, LEMAR-IUEM-UBO, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, Technopôle Brest Iroise - rue Dumont d'Urville, 29280 Plouzané, France.
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Meslet-Cladière L, Delage L, Leroux CJJ, Goulitquer S, Leblanc C, Creis E, Gall EA, Stiger-Pouvreau V, Czjzek M, Potin P. Structure/function analysis of a type iii polyketide synthase in the brown alga Ectocarpus siliculosus reveals a biochemical pathway in phlorotannin monomer biosynthesis. Plant Cell 2013; 25:3089-103. [PMID: 23983220 PMCID: PMC3784601 DOI: 10.1105/tpc.113.111336] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/03/2013] [Accepted: 08/07/2013] [Indexed: 05/05/2023]
Abstract
Brown algal phlorotannins are structural analogs of condensed tannins in terrestrial plants and, like plant phenols, they have numerous biological functions. Despite their importance in brown algae, phlorotannin biosynthetic pathways have been poorly characterized at the molecular level. We found that a predicted type III polyketide synthase in the genome of the brown alga Ectocarpus siliculosus, PKS1, catalyzes a major step in the biosynthetic pathway of phlorotannins (i.e., the synthesis of phloroglucinol monomers from malonyl-CoA). The crystal structure of PKS1 at 2.85-Å resolution provided a good quality electron density map showing a modified Cys residue, likely connected to a long chain acyl group. An additional pocket not found in other known type III PKSs contains a reaction product that might correspond to a phloroglucinol precursor. In vivo, we also found a positive correlation between the phloroglucinol content and the PKS III gene expression level in cells of a strain of Ectocarpus adapted to freshwater during its reacclimation to seawater. The evolution of the type III PKS gene family in Stramenopiles suggests a lateral gene transfer event from an actinobacterium.
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Affiliation(s)
- Laurence Meslet-Cladière
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Pierre et Marie Curie, Université Paris 6, Marine Plants and Biomolecules Laboratory, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Européenne de Bretagne, Université de Bretagne Occidentale, Laboratoire des Sciences de l'Environnement Marin, Unité Mixte de Recherche, Centre National de la Recherche Scientifique 6539, European Institute for Marine Sciences, 29280 Plouzané, Brittany, France
| | - Ludovic Delage
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Pierre et Marie Curie, Université Paris 6, Marine Plants and Biomolecules Laboratory, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
| | - Cédric J.-J. Leroux
- Centre de Ressources de Biologie Marine, MetaboMer and Structural Biology Core Facilities, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
| | - Sophie Goulitquer
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Pierre et Marie Curie, Université Paris 6, Marine Plants and Biomolecules Laboratory, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Centre de Ressources de Biologie Marine, MetaboMer and Structural Biology Core Facilities, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
| | - Catherine Leblanc
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Pierre et Marie Curie, Université Paris 6, Marine Plants and Biomolecules Laboratory, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
| | - Emeline Creis
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Pierre et Marie Curie, Université Paris 6, Marine Plants and Biomolecules Laboratory, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
| | - Erwan Ar Gall
- Université Européenne de Bretagne, Université de Bretagne Occidentale, Laboratoire des Sciences de l'Environnement Marin, Unité Mixte de Recherche, Centre National de la Recherche Scientifique 6539, European Institute for Marine Sciences, 29280 Plouzané, Brittany, France
| | - Valérie Stiger-Pouvreau
- Université Européenne de Bretagne, Université de Bretagne Occidentale, Laboratoire des Sciences de l'Environnement Marin, Unité Mixte de Recherche, Centre National de la Recherche Scientifique 6539, European Institute for Marine Sciences, 29280 Plouzané, Brittany, France
| | - Mirjam Czjzek
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Pierre et Marie Curie, Université Paris 6, Marine Plants and Biomolecules Laboratory, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
| | - Philippe Potin
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
- Université Pierre et Marie Curie, Université Paris 6, Marine Plants and Biomolecules Laboratory, Unité Mixte de Recherche 7139, Station Biologique de Roscoff, 29688 Roscoff cedex, Brittany, France
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Le Lann K, Connan S, Stiger-Pouvreau V. Phenology, TPC and size-fractioning phenolics variability in temperate Sargassaceae (Phaeophyceae, Fucales) from Western Brittany: native versus introduced species. Mar Environ Res 2012; 80:1-11. [PMID: 22770761 DOI: 10.1016/j.marenvres.2012.05.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 05/29/2012] [Accepted: 05/30/2012] [Indexed: 06/01/2023]
Abstract
The phenology of the introduced Sargassum muticum and two native species Bifurcaria bifurcata and Cystoseira baccata were monitored during eighteen months at two sites in Brittany. Density and length varied seasonally only in Sargassum. Larger individuals of Sargassum were observed in summer whereas in Cystoseira, they appeared almost in autumn. Peaks in maturity were delayed: in summer for Sargassum and in winter for Cystoseira and Bifurcaria. Phenolic contents increased before their respective reproductive period as a chemical defence. Moreover, size composition varied with site and season depending on species. In Sargassum, the quantity of small compounds decreased in summer together with an increase of 2000/5000 Da compounds. In Bifurcaria 2000/5000 Da compounds increased in summer (photoprotection) while in Cystoseira it increased in winter (protection for reproduction). Sargassum presented then a phenological plasticity not observed in native species. Moreover the three species possessed different chemical strategies to succeed in partitioning their vital space.
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Affiliation(s)
- K Le Lann
- LEBHAM EA 3877, European Institute of Marine Studies (IUEM), University of Western Brittany (UBO), European University of Brittany (UEB), Technopôle Brest-Iroise, 29280 Plouzané, France.
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Jégou C, Culioli G, Kervarec N, Simon G, Stiger-Pouvreau V. LC/ESI-MS n and 1H HR-MAS NMR analytical methods as useful taxonomical tools within the genus Cystoseira C. Agardh (Fucales; Phaeophyceae). Talanta 2010; 83:613-22. [PMID: 21111182 DOI: 10.1016/j.talanta.2010.10.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 09/28/2010] [Accepted: 10/02/2010] [Indexed: 11/28/2022]
Abstract
Species of the genus Cystoseira are particularly hard to discriminate, due to the complexity of their morphology, which can be influenced by their phenological state and ecological parameters. Our study emphasized on the relevance of two kinds of analytical tools, (1) LC/ESI-MS(n) and (2) (1)H HR-MAS NMR, also called in vivo NMR, to identify Cystoseira specimens at the specific level and discuss their taxonomy. For these analyses, samples were collected at several locations in Brittany (France), where Cystoseira baccata, C. foeniculacea, C. humilis, C. nodicaulis and C. tamariscifolia were previously reported. To validate our chemical procedure, the sequence of the ITS2 has been obtained for each species to investigate their phylogenetic relationships at a molecular level. Our study highlighted the consistency of the two physico-chemical methods, compared to "classical" molecular approach, in studying taxonomy within the genus Cystoseira. Especially, LC/ESI-MS(n) and phylogenetic analyses converged into the discrimination of two taxonomical groups among the 5 species. The occurrence of some specific signals in the (1)H HR-MAS NMR spectra and/or some characteristic chemical compounds during LC/ESI-MS(n) analysis could be regarded as discriminating factors. LC/ESI-MS(n) and (1)H HR-MAS NMR turned out to be two relevant and innovative techniques to discriminate taxonomically this complex genus.
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Affiliation(s)
- Camille Jégou
- Laboratoire d'Écophysiologie et de Biotechnologies des Halophytes et des Algues Marines EA 3877, Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, rue Dumont D'Urville, 29280 Plouzané, France.
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Plouguerné E, Ioannou E, Georgantea P, Vagias C, Roussis V, Hellio C, Kraffe E, Stiger-Pouvreau V. Anti-microfouling activity of lipidic metabolites from the invasive brown alga Sargassum muticum (Yendo) Fensholt. Mar Biotechnol (NY) 2010; 12:52-61. [PMID: 19468792 DOI: 10.1007/s10126-009-9199-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Accepted: 05/02/2009] [Indexed: 05/22/2023]
Abstract
The purification of the chloroform extract from the brown invasive macroalga Sargassum muticum, through a series of chromatographic separations, yielded 12 fractions that were tested against strains of bacteria, microalgae, and fungi involved in marine biofilm formation. The chemical composition of four (a, c, g, and k) out of the six fractions that exhibited anti-microfouling activity was investigated. Fraction a contained saturated and unsaturated linear hydrocarbons (C12-C27). Arachidonic acid was identified as the major metabolite in fraction c whereas fraction g contained mainly palmitic, linolenic, and palmitoleic acids. Fraction k was submitted to further purification yielding the fraction kAcaF1e that was composed of galactoglycerolipids, active against the growth of two of the four bacterial strains (Shewanella putrefaciens and Polaribacter irgensii) and all tested fungi. These promising results, in particular the isolation and the activity of galactoglycerolipids, attest the potential of the huge biomass of S. muticum as a source of new environmentally friendly antifouling compounds.
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Affiliation(s)
- Erwan Plouguerné
- Université Européenne de Bretagne, Université de Brest, EA LEBHAM 3877, European Institute for Marine Sciences (IUEM), Place N. Copernic, 29280 Plouzané, France.
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Zubia M, Fabre MS, Kerjean V, Lann KL, Stiger-Pouvreau V, Fauchon M, Deslandes E. Antioxidant and antitumoural activities of some Phaeophyta from Brittany coasts. Food Chem 2009. [DOI: 10.1016/j.foodchem.2009.03.025] [Citation(s) in RCA: 165] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mattio L, Payri CE, Stiger-Pouvreau V. TAXONOMIC REVISION OF SARGASSUM (FUCALES, PHAEOPHYCEAE) FROM FRENCH POLYNESIA BASED ON MORPHOLOGICAL AND MOLECULAR ANALYSES(1). J Phycol 2008; 44:1541-1555. [PMID: 27039868 DOI: 10.1111/j.1529-8817.2008.00597.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An assessment of Sargassum in French Polynesia was done through the critical revision of the literature, type specimens, and specimens from type localities. Sargassum samples were newly collected, and four morphotypes were identified on the basis of morphological characters. Molecular analysis of the nuclear ITS2, chloroplastic partial rbcLS, and mitochondrial cox3 markers generated two clades and confirmed the recent divergence suspected between closely related species. Although 18 different epithets have been attributed to French Polynesian Sargassum since 1828, only three species are considered valid in this study. Most of these species were transferred to S. pacificum Bory, the only species present in the Society Archipelago, while S. obtusifolium J. Agardh was restricted to the Austral Archipelago, and S. echinocarpum J. Agardh was confirmed for the Austral and Gambier Archipelagos. A morphological identification key is provided, along with descriptions and illustrations for each polymorphic species. Moreover, the study of several regional collections underlined similar and low specific diversity among Sargassum populations in the southeastern Pacific. As a result of this study, we propose that S. bacciferum J. Agardh var. latiuscula Grunow, S. bisserula f. pacifica Grunow, S. boraborense (Grunow) Setch., S. mangarevense (Grunow) Setch., S. sociale (Grunow) Setch., and S. tahitense Grunow be considered as heterotypic synonyms of S. pacificum. Sargassum skottsbergii Sjöstedt, S. hawaiiensis Doty et Newhouse, S. divaricatum var. chilensis Grunow, S. obtusifolium J. Agardh f. chamberlainii Grunow, and S. obtusifolium J. Agardh f. lendigeroides Grunow are further regarded as heterotypic synonyms of S. obtusifolium.
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Affiliation(s)
- Lydiane Mattio
- Institut de Recherche pour le Développement, UMR7138 SAE, BPA5, 98848 Nouméa, New Caledonia Université de la Méditerranée, UMR6540 DIMAR COM, 13288 Marseille cedex 9, France Institut de Recherche pour le Développement, UMR7138 SAE, BPA5, 98848 Nouméa, New Caledonia Université de la Polynésie Française, BP6570 Faa'a, Tahiti, French PolynesiaUniversité de Bretagne Occidentale, IUEM, LEBHAM EA 3877, 29280 Plouzané, France
| | - Claude Elisabeth Payri
- Institut de Recherche pour le Développement, UMR7138 SAE, BPA5, 98848 Nouméa, New Caledonia Université de la Méditerranée, UMR6540 DIMAR COM, 13288 Marseille cedex 9, France Institut de Recherche pour le Développement, UMR7138 SAE, BPA5, 98848 Nouméa, New Caledonia Université de la Polynésie Française, BP6570 Faa'a, Tahiti, French PolynesiaUniversité de Bretagne Occidentale, IUEM, LEBHAM EA 3877, 29280 Plouzané, France
| | - Valérie Stiger-Pouvreau
- Institut de Recherche pour le Développement, UMR7138 SAE, BPA5, 98848 Nouméa, New Caledonia Université de la Méditerranée, UMR6540 DIMAR COM, 13288 Marseille cedex 9, France Institut de Recherche pour le Développement, UMR7138 SAE, BPA5, 98848 Nouméa, New Caledonia Université de la Polynésie Française, BP6570 Faa'a, Tahiti, French PolynesiaUniversité de Bretagne Occidentale, IUEM, LEBHAM EA 3877, 29280 Plouzané, France
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Le Lann K, Kervarec N, Payri CE, Deslandes E, Stiger-Pouvreau V. Discrimination of allied species within the genus Turbinaria (Fucales, Phaeophyceae) using HRMAS NMR spectroscopy. Talanta 2008; 74:1079-83. [PMID: 18371754 DOI: 10.1016/j.talanta.2007.08.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2007] [Revised: 07/31/2007] [Accepted: 08/09/2007] [Indexed: 10/22/2022]
Abstract
A novel chemotaxonomical method based on 1D (1)H HRMAS NMR spectroscopy is being tested for taxonomical purposes. This powerful technique allowed us to discriminate between specimens belonging to two sister species of Turbinaria, which are difficult to tell apart using only morphological characters. Based on spectra analysis, the results allowed us to successfully group the specimens according to their species. Thus, the efficiency of HRMAS NMR spectroscopy for the discrimination of algal species and for the pre-screening of potential chemomarkers is demonstrated.
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Affiliation(s)
- K Le Lann
- Laboratoire d'Ecophysiologie et de Biotechnologie des Halophytes et des Algues Marines (LEBHAM EA 3877), Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, Plouzané, France
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Plouguerné E, Kikuchi H, Oshima Y, Deslandes E, Stiger-Pouvreau V. Isolation of Cholest-5-en-3-ol formate from the red alga Grateloupia turuturu Yamada and its chemotaxonomic significance. BIOCHEM SYST ECOL 2006. [DOI: 10.1016/j.bse.2006.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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