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Uji T, Kandori T, Mizuta H. Identification of differential gene expression related to reproduction in the sporophytes of Saccharina japonica. FRONTIERS IN PLANT SCIENCE 2024; 15:1417582. [PMID: 39166251 PMCID: PMC11333212 DOI: 10.3389/fpls.2024.1417582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 07/12/2024] [Indexed: 08/22/2024]
Abstract
Saccharina japonica, a significant brown macroalga in the Pacific Ocean, serves as a food source and industrial material. In aquaculture, collecting mature sporophytes for seedling production is essential but challenging due to environmental changes. In this study, transcriptomic analysis of vegetative and sorus tissues was done to identify differentially expressed genes (DEGs) and enhance our understanding of sorus formation regulation in S. japonica. KEGG pathway and Gene Otology (GO) analysis revealed that upregulated DEGs were involved in folate biosynthesis, riboflavin metabolism, and amino acid biosynthesis. In addition, the upregulation of genes associated with cell wall remodeling, such as mannuronan C-5-epimerases, vanadium-dependent haloperoxidases, and NADPH oxidase, was observed in sorus parts. Meanwhile, downregulated DEGs in sorus portions included genes related to chloroplast function. These findings will help us understand the regulatory mechanisms behind sorus formation in S. japonica and extracellular matrix remodeling in brown algae.
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Affiliation(s)
- Toshiki Uji
- Laboratory of Aquaculture Genetics and Genomics, Division of Marine Life Science, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Japan
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Lee ZJ, Xie C, Ng K, Suleria HAR. Unraveling the bioactive interplay: seaweed polysaccharide, polyphenol and their gut modulation effect. Crit Rev Food Sci Nutr 2023:1-24. [PMID: 37991467 DOI: 10.1080/10408398.2023.2274453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Seaweed is rich in many unique bioactive compounds such as polyphenols and sulfated polysaccharides that are not found in terrestrial plant. The discovery of numerous biological activities from seaweed has made seaweed an attractive functional food source with the potential to be exploited for human health benefits. During food processing and digestion, cell wall polysaccharide and polyphenols commonly interact, and this may influence the nutritional properties of food. Interactions between cell wall polysaccharide and polyphenols in plant-based system has been extensively studied. However, similar interactions in seaweed have received little attention despite the vast disparity between the structural and chemical composition of plant and seaweed cell wall. This poses a challenge in extracting seaweed bioactive compounds with intact biological properties. This review aims to summarize the cell wall polysaccharide and polyphenols present in brown, red and green seaweed, and current knowledge on their potential interactions. Moreover, this review gives an overview of the gut modulation effect of seaweed polysaccharide and polyphenol.
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Affiliation(s)
- Zu Jia Lee
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, Australia
| | - Cundong Xie
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, Australia
| | - Ken Ng
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, Australia
| | - Hafiz A R Suleria
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, Australia
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Martinović J, Lukinac J, Jukić M, Ambrus R, Planinić M, Šelo G, Klarić AM, Perković G, Bucić-Kojić A. In Vitro Bioaccessibility Assessment of Phenolic Compounds from Encapsulated Grape Pomace Extract by Ionic Gelation. Molecules 2023; 28:5285. [PMID: 37446946 DOI: 10.3390/molecules28135285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/29/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023] Open
Abstract
Grape pomace is a by-product of winemaking characterized by a rich chemical composition from which phenolics stand out. Phenolics are health-promoting agents, and their beneficial effects depend on their bioaccessibility, which is influenced by gastrointestinal digestion. The effect of encapsulating phenol-rich grape pomace extract (PRE) with sodium alginate (SA), a mixture of SA with gelatin (SA-GEL), and SA with chitosan (SA-CHIT) on the bioaccessibility index (BI) of phenolics during simulated digestion in vitro was studied. A total of 27 individual phenolic compounds (IPCs) were quantified by UHPLC. The addition of a second coating to SA improved the encapsulation efficiency (EE), and the highest EE was obtained for SA-CHIT microbeads (56.25%). Encapsulation affected the physicochemical properties (size, shape and texture, morphology, crystallinity) of the produced microbeads, which influenced the delivery of phenolics to the intestine and their BI. Thus, SA-GEL microbeads had the largest size parameters, as confirmed by scanning electron microscopy (SEM), and the highest BI for total phenolic compounds and IPCs (gallic acid, 3,4-dihydroxybenzoic acid and o-coumaric acid, epicatechin, and gallocatechin gallate) ranged from 96.20 to 1011.3%. The results suggest that encapsulated PRE has great potential to be used as a functional ingredient in products for oral administration.
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Affiliation(s)
- Josipa Martinović
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
| | - Jasmina Lukinac
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
| | - Marko Jukić
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
| | - Rita Ambrus
- Faculty of Pharmacy, Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, H-6720 Szeged, Hungary
| | - Mirela Planinić
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
| | - Gordana Šelo
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
| | - Ana-Marija Klarić
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
| | - Gabriela Perković
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
| | - Ana Bucić-Kojić
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, F. Kuhača 18, HR-31 000 Osijek, Croatia
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Quémener M, Kikionis S, Fauchon M, Toueix Y, Aulanier F, Makris AM, Roussis V, Ioannou E, Hellio C. Antifouling Activity of Halogenated Compounds Derived from the Red Alga Sphaerococcus coronopifolius: Potential for the Development of Environmentally Friendly Solutions. Mar Drugs 2021; 20:md20010032. [PMID: 35049887 PMCID: PMC8778584 DOI: 10.3390/md20010032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/23/2021] [Accepted: 12/23/2021] [Indexed: 11/24/2022] Open
Abstract
Nowadays, biofouling is responsible for enormous economic losses in the maritime sector, and its treatment with conventional antifouling paints is causing significant problems to the environment. Biomimetism and green chemistry approaches are very promising research strategies for the discovery of new antifouling compounds. This study focused on the red alga Sphaerococcus coronopifolius, which is known as a producer of bioactive secondary metabolites. Fifteen compounds, including bromosphaerol (1), were tested against key marine biofoulers (five marine bacteria and three microalgae) and two enzymes associated with the adhesion process in macroalgae and invertebrates. Each metabolite presented antifouling activity against at least one organism/enzyme. This investigation also revealed that two compounds, sphaerococcinol A (4) and 14R-hydroxy-13,14-dihydro-sphaerococcinol A (5), were the most potent compounds without toxicity towards oyster larvae used as non-target organisms. These compounds are of high potential as they are active towards key biofoulers and could be produced by a cultivable alga, a fact that is important from the green chemistry point of view.
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Affiliation(s)
- Maxence Quémener
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Stefanos Kikionis
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (S.K.); (V.R.)
| | - Marilyne Fauchon
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Yannick Toueix
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Fanny Aulanier
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Antonios M. Makris
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece;
| | - Vassilios Roussis
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (S.K.); (V.R.)
| | - Efstathia Ioannou
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (S.K.); (V.R.)
- Correspondence: (E.I.); (C.H.)
| | - Claire Hellio
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
- Correspondence: (E.I.); (C.H.)
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Emeline CB, Ludovic D, Laurent V, Catherine L, Kruse I, Erwan AG, Florian W, Philippe P. Induction of Phlorotannins and Gene Expression in the Brown Macroalga Fucus vesiculosus in Response to the Herbivore Littorina littorea. Mar Drugs 2021; 19:185. [PMID: 33810577 PMCID: PMC8067260 DOI: 10.3390/md19040185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/23/2021] [Accepted: 03/23/2021] [Indexed: 01/05/2023] Open
Abstract
Mechanisms related to the induction of phlorotannin biosynthesis in marine brown algae remain poorly known. Several studies undertaken on fucoid species have shown that phlorotannins accumulate in the algae for several days or weeks after being exposed to grazing, and this is measured by direct quantification of soluble phenolic compounds. In order to investigate earlier inducible responses involved in phlorotannin metabolism, Fucus vesiculosus was studied between 6 and 72 h of grazing by the sea snail Littorina littorea. In this study, the quantification of soluble phenolic compounds was complemented by a Quantitative real-time PCR (qRT-PCR) approach applied on genes that are potentially involved in either the phlorotannin metabolism or stress responses. Soluble phlorotannin levels remained stable during the kinetics and increased significantly only after 12 h in the presence of grazers, compared to the control, before decreasing to the initial steady state for the rest of the kinetics. Under grazing conditions, the expression of vbpo, cyp450 and ast6 genes was upregulated, respectively, at 6 h, 12 h and 24 h, and cyp450 gene was downregulated after 72 h. Interestingly, the pksIII gene involved in the synthesis of phloroglucinol was overexpressed under grazing conditions after 24 h and 72 h. This study supports the hypothesis that phlorotannins are able to provide an inducible chemical defense under grazing activity, which is regulated at different stages of the stress response.
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Affiliation(s)
- Creis Bendelac Emeline
- Integrative Biology of Marine Models (LBI2M), CNRS, Sorbonne Université, UMR 8227, Station Biologique, Place Georges Teissier, 29680 Roscoff, Brittany, France; (C.B.E.); (D.L.); (V.L.); (L.C.)
- International Research Laboratory IRL 3614, CNRS, Sorbonne Université, PUC, UACH, Evolutionary Biology and Ecology of Algae, EBEA, Station Biologique, 29680 Roscoff, Brittany, France
| | - Delage Ludovic
- Integrative Biology of Marine Models (LBI2M), CNRS, Sorbonne Université, UMR 8227, Station Biologique, Place Georges Teissier, 29680 Roscoff, Brittany, France; (C.B.E.); (D.L.); (V.L.); (L.C.)
| | - Vallet Laurent
- Integrative Biology of Marine Models (LBI2M), CNRS, Sorbonne Université, UMR 8227, Station Biologique, Place Georges Teissier, 29680 Roscoff, Brittany, France; (C.B.E.); (D.L.); (V.L.); (L.C.)
| | - Leblanc Catherine
- Integrative Biology of Marine Models (LBI2M), CNRS, Sorbonne Université, UMR 8227, Station Biologique, Place Georges Teissier, 29680 Roscoff, Brittany, France; (C.B.E.); (D.L.); (V.L.); (L.C.)
| | - Inken Kruse
- Helmholtz Centre for Ocean Research (GEOMAR), Düsternbrooker Weg 20, 24105 Kiel, Germany; (I.K.); (W.F.)
| | - Ar Gall Erwan
- Laboratoire des Sciences de l’Environnement Marin, UBO European Institute for Marine Studies IUEM, University of Brest—Western Brittany, UMR 6539 LEMAR, Technopôle Brest Iroise, Rue Dumont d’Urville, 29280 Plouzané, Brittany, France
| | - Weinberger Florian
- Helmholtz Centre for Ocean Research (GEOMAR), Düsternbrooker Weg 20, 24105 Kiel, Germany; (I.K.); (W.F.)
| | - Potin Philippe
- Integrative Biology of Marine Models (LBI2M), CNRS, Sorbonne Université, UMR 8227, Station Biologique, Place Georges Teissier, 29680 Roscoff, Brittany, France; (C.B.E.); (D.L.); (V.L.); (L.C.)
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6
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Birkemeyer C, Lemesheva V, Billig S, Tarakhovskaya E. Composition of Intracellular and Cell Wall-Bound Phlorotannin Fractions in Fucoid Algae Indicates Specific Functions of These Metabolites Dependent on the Chemical Structure. Metabolites 2020; 10:E369. [PMID: 32933101 PMCID: PMC7570113 DOI: 10.3390/metabo10090369] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 01/03/2023] Open
Abstract
Accumulation of biologically active metabolites is a specific feature of plant biochemistry, directing the use of plants in numerous applications in the pharmaceutical and food industries. Among these substances, the plethora of phenolic compounds has attracted particular interest among researchers. Here, we report on new findings in phlorotannin research, a large group of multifunctional phenolic substances, produced in brown algae. Comprehensive LC-MS profiling of three algal species allowed us to depict the complex pattern of this structurally diverse compound group across different tissues and subcellular compartments. We compiled more than 30 different phlorotannin series in one sample and used accurate mass spectrometry to assign tentative structures to the observed ions based on the confirmed sum formulas. From that, we found that acetylation, hydroxylation, and oxidation are likely to be the most common in vivo modifications to phlorotannins. Using an alternative data mining strategy to cope with extensive coelution and structural isomers, we quantitatively compared the intensity of different phlorotannin series in species, tissues, and subcellular compartments to learn more about their physiological functions. The structure and intra-thallus profiles of cell wall-bound phlorotannins were studied here for the first time. We suggest that one of the major dibenzodioxin-type phlorotannin series may exclusively target integration into the cell wall of fucoid algae.
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Affiliation(s)
- Claudia Birkemeyer
- Faculty of Chemistry and Mineralogy, University of Leipzig, 04103 Leipzig, Germany;
| | - Valeriya Lemesheva
- Department of Plant Physiology and Biochemistry, Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia;
| | - Susan Billig
- Faculty of Chemistry and Mineralogy, University of Leipzig, 04103 Leipzig, Germany;
| | - Elena Tarakhovskaya
- Department of Plant Physiology and Biochemistry, Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia;
- Department of Scientific Information, Russian Academy of Sciences Library, 199034 St. Petersburg, Russia
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Bai Y, Liu X, Shi SQ, Li J. A Tough and Mildew-Proof Soybean-Based Adhesive Inspired by Mussel and Algae. Polymers (Basel) 2020; 12:E756. [PMID: 32244366 PMCID: PMC7240608 DOI: 10.3390/polym12040756] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 03/22/2020] [Accepted: 03/26/2020] [Indexed: 11/16/2022] Open
Abstract
Despite the recent advances in protein-based adhesives, achieving strong adhesion and mold resistance in wet environment is challenging. Herein, a facile fabrication technology of preparing tough bio-adhesive by incorporating soybean meal and blood meal is presented. Inspired by the marine mussel byssi and brown algae, metal coordination was introduced into a loosely bound protein system to construct multiple chemical cross-linking networks. Mixed alkali-modified blood meal (mBM) was mixed with soybean meal, then 1,6-hexane dioldiglycidyl ether (HDE) and zinc ion were introduced to fabricate soybean meal and blood meal-based adhesives. The attained adhesives exhibited good thermal stability, water resistance (the wet shear strength is 1.1 MPa), and mold resistance, with appropriate solid content (34.3%) and relatively low moisture uptake (11.9%). These outstanding performances would be attributed to the reaction of 1,6-hexane dioldiglycidyl ether with protein to form a preliminary cross-linking network; subsequently, the coordination of zinc ions with amino or carboxyl strengthened and toughened the adhesive. Finally, the calcium ions gelled the adhesives, providing cohesion force and making the network structure more compact. This study realized the value-added utilization of protein co-products and developed a new eco-friendly bio-based adhesive.
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Affiliation(s)
- Yue Bai
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; (Y.B.); (X.L.)
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Beijing 100083, China;
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Xiaorong Liu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; (Y.B.); (X.L.)
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Beijing 100083, China;
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Sheldon Q. Shi
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Beijing 100083, China;
- Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA
| | - Jianzhang Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; (Y.B.); (X.L.)
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Beijing 100083, China;
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
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Kerrison PD, Stanley MS, Mitchell E, Cunningham L, Hughes AD. A life-stage conflict of interest in kelp: Higher meiospore settlement where sporophyte attachment is weak. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Zhang X, Kang X, Jin L, Bai J, Liu W, Wang Z. Stimulation of wound healing using bioinspired hydrogels with basic fibroblast growth factor (bFGF). Int J Nanomedicine 2018; 13:3897-3906. [PMID: 30013343 PMCID: PMC6038860 DOI: 10.2147/ijn.s168998] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
INTRODUCTION The objective of this study is to stimulate wound healing using bioinspired hydrogels with basic fibroblast growth factor (bFGF). MATERIALS AND METHODS Inspired by the crosslinking mechanism in algae-based adhesives, hydrogels were fabricated with gum arabic, pectin, and Ca2+. The physical properties of the bioinspired hydrogels were characterized, and the in vitro release of bFGF was investigated. Then, the in vitro scratch assay for wound healing and in vivo wound healing experiment in a full-thickness excision wound model were performed for the bioinspired hydrogels with bFGF. Finally, histological examinations and organ toxicity tests were conducted to investigate the wound healing applications of the bioinspired hydrogels with bFGF. RESULTS The in vitro and in vivo results showed that the bioinspired hydrogels with bFGF could significantly enhance cell proliferation, wound re-epithelialization, collagen deposition, and contraction without any noticeable toxicity and inflammation compared with the hydrogels without bFGF and commercial wound healing products. CONCLUSION These results suggest the potential application of bioinspired hydrogels with bFGF for wound healing.
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Affiliation(s)
- Xiaoyu Zhang
- Third Ward of Tumor Surgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, People's Republic of China,
| | - Xiaoning Kang
- Third Ward of Ultrasound Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, People's Republic of China
| | - Lijun Jin
- Third Ward of Tumor Surgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, People's Republic of China,
| | - Jie Bai
- Third Ward of Tumor Surgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, People's Republic of China,
| | - Wei Liu
- Third Ward of Tumor Surgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, People's Republic of China,
| | - Zunyi Wang
- Third Ward of Tumor Surgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, People's Republic of China,
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Punitha T, Phang SM, Juan JC, Beardall J. Environmental Control of Vanadium Haloperoxidases and Halocarbon Emissions in Macroalgae. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2018; 20:282-303. [PMID: 29691674 DOI: 10.1007/s10126-018-9820-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 12/04/2017] [Indexed: 06/08/2023]
Abstract
Vanadium-dependent haloperoxidases (V-HPO), able to catalyze the reaction of halide ions (Cl-, Br-, I-) with hydrogen peroxide, have a great influence on the production of halocarbons, which in turn are involved in atmospheric ozone destruction and global warming. The production of these haloperoxidases in macroalgae is influenced by changes in the surrounding environment. The first reported vanadium bromoperoxidase was discovered 40 years ago in the brown alga Ascophyllum nodosum. Since that discovery, more studies have been conducted on the structure and mechanism of the enzyme, mainly focused on three types of V-HPO, the chloro- and bromoperoxidases and, more recently, the iodoperoxidase. Since aspects of environmental regulation of haloperoxidases are less well known, the present paper will focus on reviewing the factors which influence the production of these enzymes in macroalgae, particularly their interactions with reactive oxygen species (ROS).
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Affiliation(s)
- Thillai Punitha
- Institute of Ocean and Earth Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia
- Institute of Graduate Studies, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Siew-Moi Phang
- Institute of Ocean and Earth Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Joon Ching Juan
- Nanotechnology and Catalysis Research Centre (NANOCAT), University of Malaya, Level 3, IPS Building, Kuala Lumpur, Malaysia.
- School of Science, Monash University Malaysia Campus, Bandar Sunway, 46150, Subang Jaya, Malaysia.
| | - John Beardall
- School of Biological Sciences, Monash University, Clayton, VIC, 3800, Australia
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Le HN, Hughes AD, Kerrison PD. Early development and substrate twine selection for the cultivation of Sargassum muticum (Yendo) Fensholt under laboratory conditions. JOURNAL OF APPLIED PHYCOLOGY 2018; 30:2475-2483. [PMID: 30147239 PMCID: PMC6096784 DOI: 10.1007/s10811-018-1459-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 03/15/2018] [Accepted: 03/15/2018] [Indexed: 06/08/2023]
Abstract
The phaeophyte macroalgae Sargassum muticum is under investigation as a cultivation crop within its native range in SE Asia, alongside other members of the Sargassum genus. During the critical hatchery phase, germlings are grown to ≥ several millimeters ready for outplanting. By optimising the growth medium and twine substrate used for the germling attachment, hatcheries can become more efficient and cost-effective. An 8-week replicated laboratory experiment investigated these factors. It found that adding 0.125 mL L-1 of saturated germanium dioxide during the first week increased mean germling size by 23% (p < 0.005), whereas additional nutrients in the form of F/2 medium made no difference (p > 0.05). Six twine substrates were also tested: jute, cotton, polyamide/cotton, polyester, polyvinyl alcohol and polypropylene. Sargassum muticum grew similarly well on all, although attachment success during the first week was highest on the rougher natural fibres, particularly jute. A negative density-dependent effect of germling density on growth was seen across all materials, with the highest growth seen on the materials with the lowest germling density. Jute is recommended as a highly suitable substrate for hatchery cultivation in this species, although the initial density should be carefully controlled to prevent intraspecific competition.
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Affiliation(s)
- Hau Nhu Le
- Scottish Association for Marine Science (SAMS), Scottish Marine Institute, Dunbeg, Argyll 1QA UK
- Nha Trang Institute of Technology and Application (NITRA), Vietnam Academy of Science and Technology (VAST), 2 Hung Vuong Street, Nha Trang, Vietnam
| | - Adam D. Hughes
- Scottish Association for Marine Science (SAMS), Scottish Marine Institute, Dunbeg, Argyll 1QA UK
| | - Philip D. Kerrison
- Scottish Association for Marine Science (SAMS), Scottish Marine Institute, Dunbeg, Argyll 1QA UK
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Puspita M, Déniel M, Widowati I, Radjasa OK, Douzenel P, Marty C, Vandanjon L, Bedoux G, Bourgougnon N. Total phenolic content and biological activities of enzymatic extracts from Sargassum muticum (Yendo) Fensholt. JOURNAL OF APPLIED PHYCOLOGY 2017; 29:2521-2537. [PMID: 32214664 PMCID: PMC7088061 DOI: 10.1007/s10811-017-1086-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 02/07/2017] [Accepted: 02/08/2017] [Indexed: 06/02/2023]
Abstract
Seaweeds are potentially excellent sources of bioactive metabolites that could represent useful leads in the development of new functional ingredients in pharmaceutical and cosmetic industries. In the last decade, new marine bioprocess technologies have allowed the isolation of substances with biological properties. The brown alga Sargassum muticum (Yendo) Fensholt (Ochrophyta) was enzymatically hydrolyzed to prepare water-soluble extracts by using six different commercially available carbohydrate-degrading enzymes and two proteases. Evaluation of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) antioxidant, tyrosinase, elastase, and biofilm inhibition, antibacterial and antiviral activities as well as evaluation of cytotoxicity were realized for each extract. Total phenolic content was measured for extract characterization, and solid-phase extraction was useful to purify the enzymatic extract. Soluble total phenolic content of S. muticum Viscozyme extract was highest with 6.4% of dry weight. Enzymatic Celluclast and Viscozyme extracts had the lowest value of DPPH IC50 indicating a strong antiradical activity, 0.6 mg mL-1, in comparison with other enzymes. The ferric reducing antioxidant power ranged between 48.7 μM Fe2+ Eq, digested with Viscozyme, and 60.8 μM Fe2+ Eq, digested with Amyloglucosidase. Tyrosinase inhibition activity of S. muticum Neutrase extract was 41.3% higher compared to other enzymes. Elastase inhibition activity of S. muticum Shearzyme extract had highest activity (32.8%). All enzymatic extracts showed no cytotoxic effect towards the kidney Vero cells. Meanwhile, only S. muticum Neutrase and Alcalase extracts exhibited potential antiviral activity. In addition, S. muticum Viscozyme and Shearzyme extracts showed promising activity in suppressing the biofilm formation against Pseudomonas aeruginosa and Escherichia coli, respectively. Purification of S. muticum Viscozyme extracts by solid-phase extraction managed to concentrate the phenolic content and improve the bioactivity. These results indicate the promising potential of enzyme-assisted followed by solid-phase extraction in recovering phenolic content and in improving its bioactivity.
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Affiliation(s)
- Maya Puspita
- Université Bretagne Sud, EA 3884, LBCM, IUEM, 56000, Vannes, France
- Faculty of Fisheries and Marine Science, Marine Science Department, Diponegoro University, Semarang, 50275 Indonesia
| | - Maureen Déniel
- Université Bretagne Sud, EA 3884, LBCM, IUEM, 56000, Vannes, France
- Université de Nantes, GEPEA-UMR CNRS, 6144 Saint-Nazaire, France
| | - Ita Widowati
- Faculty of Fisheries and Marine Science, Marine Science Department, Diponegoro University, Semarang, 50275 Indonesia
| | - Ocky Karna Radjasa
- Faculty of Fisheries and Marine Science, Marine Science Department, Diponegoro University, Semarang, 50275 Indonesia
| | | | - Christel Marty
- Université Bretagne Sud, EA 3884, LBCM, IUEM, 56000, Vannes, France
| | - Laurent Vandanjon
- Université Bretagne Sud, EA 3884, LBCM, IUEM, 56000, Vannes, France
- Université de Nantes, GEPEA-UMR CNRS, 6144 Saint-Nazaire, France
| | - Gilles Bedoux
- Université Bretagne Sud, EA 3884, LBCM, IUEM, 56000, Vannes, France
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Sequence-dependent association of alginate with sodium and calcium counterions. Carbohydr Polym 2017; 157:1144-1152. [DOI: 10.1016/j.carbpol.2016.10.081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 10/09/2016] [Accepted: 10/15/2016] [Indexed: 11/18/2022]
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Torode TA, Siméon A, Marcus SE, Jam M, Le Moigne MA, Duffieux D, Knox JP, Hervé C. Dynamics of cell wall assembly during early embryogenesis in the brown alga Fucus. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:6089-6100. [PMID: 27811078 PMCID: PMC5100021 DOI: 10.1093/jxb/erw369] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Zygotes from Fucus species have been used extensively to study cell polarization and rhizoid outgrowth, and in this model system cell wall deposition aligns with the establishment of polarity. Monoclonal antibodies are essential tools for the in situ analysis of cell wall glycans, and here we report the characteristics of six monoclonal antibodies to alginates (BAM6-BAM11). The use of these, in conjunction with monoclonal antibodies to brown algal sulfated fucans, has enabled the study of the developmental dynamics of the Fucus zygote cell walls. Young zygotes are spherical and all alginate epitopes are deposited uniformly following cellulose deposition. At germination, sulfated fucans are secreted in the growing rhizoid wall. The redistribution of cell wall epitopes was investigated during treatments that cause reorientation of the growth axis (change in light direction) or disrupt rhizoid development (arabinogalactan-protein-reactive Yariv reagent). Alginate modeling was drastically impaired in the latter, and both treatments cause a redistribution of highly sulfated fucan epitopes. The dynamics of cell wall glycans in this system have been visualized in situ for the first time, leading to an enhanced understanding of the early developmental mechanisms of Fucus species. These sets of monoclonal antibodies significantly extend the available molecular tools for brown algal cell wall studies.
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Affiliation(s)
- Thomas A Torode
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Amandine Siméon
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
| | - Susan E Marcus
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Murielle Jam
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
| | - Marie-Anne Le Moigne
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
| | - Delphine Duffieux
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
| | - J Paul Knox
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Cécile Hervé
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, Roscoff, France
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Wang CS, Pan H, Weerasekare GM, Stewart RJ. Peroxidase-catalysed interfacial adhesion of aquatic caddisworm silk. J R Soc Interface 2016; 12:rsif.2015.0710. [PMID: 26490632 DOI: 10.1098/rsif.2015.0710] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Casemaker caddisfly (Hesperophylax occidentalis) larvae use adhesive silk fibres to construct protective shelters under water. The silk comprises a distinct peripheral coating on a viscoelastic fibre core. Caddisworm silk peroxinectin (csPxt), a haem-peroxidase, was shown to be glycosylated by lectin affinity chromatography and tandem mass spectrometry. Using high-resolution H2O2 and peroxidase-dependent silver ion reduction and nanoparticle deposition, imaged by electron microscopy, csPxt activity was shown to be localized in the peripheral layer of drawn silk fibres. CsPxt catalyses dityrosine cross-linking within the adhesive peripheral layer post-draw, initiated perhaps by H2O2 generated by a silk gland-specific superoxide dismutase 3 (csSOD3) from environmental reactive oxygen species present in natural water. CsSOD3 was also shown to be a glycoprotein and is likely localized in the peripheral layer. Using a synthetic fluorescent phenolic copolymer and confocal microscopy, it was shown that csPxt catalyses oxidative cross-linking to external polyphenolic compounds capable of diffusive interpenetration into the fuzzy peripheral coating, including humic acid, a natural surface-active polyphenol. The results provide evidence of enzyme-mediated covalent cross-linking of a natural bioadhesive to polyphenol conditioned interfaces as a mechanism of permanent adhesion underwater.
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Affiliation(s)
- Ching-Shuen Wang
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Huaizhong Pan
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
| | | | - Russell J Stewart
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
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Hecht H, Srebnik S. Structural Characterization of Sodium Alginate and Calcium Alginate. Biomacromolecules 2016; 17:2160-7. [PMID: 27177209 DOI: 10.1021/acs.biomac.6b00378] [Citation(s) in RCA: 266] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Alginate readily aggregates and forms a physical gel in the presence of cations. The association of the chains, and ultimately gel structure and mechanics, depends not only on ion type, but also on the sequence and composition of the alginate chain that ultimately determines its stiffness. Chain flexibility is generally believed to decrease with guluronic residue content, but it is also known that both polymannuronate and polyguluronate blocks are stiffer than heteropolymeric blocks. In this work, we use atomistic molecular dynamics simulation to primarily explore the association and aggregate structure of different alginate chains under various Ca(2+) concentrations and for different alginate chain composition. We show that Ca(2+) ions in general facilitate chain aggregation and gelation. However, aggregation is predominantly affected by alginate monomer composition, which is found to correlate with chain stiffness under certain solution conditions. In general, greater fractions of mannuronic monomers are found to increase chain flexibility of heteropolymer chains. Furthermore, differences in chain guluronic acid content are shown to lead to different interchain association mechanisms, such as lateral association, zipper mechanism, and entanglement, where the mannuronic residues are shown to operate as an elasticity moderator and therefore promote chain association.
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Affiliation(s)
- Hadas Hecht
- The Interdisciplinary Program in Polymer Engineering and ‡Department of Chemical Engineering, Technion - Israel Institute of Technology , Haifa, Israel 32000
| | - Simcha Srebnik
- The Interdisciplinary Program in Polymer Engineering and ‡Department of Chemical Engineering, Technion - Israel Institute of Technology , Haifa, Israel 32000
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Dimartino S, Savory DM, Fraser-Miller SJ, Gordon KC, McQuillan AJ. Microscopic and infrared spectroscopic comparison of the underwater adhesives produced by germlings of the brown seaweed species Durvillaea antarctica and Hormosira banksii. J R Soc Interface 2016; 13:20151083. [PMID: 27122179 PMCID: PMC4874429 DOI: 10.1098/rsif.2015.1083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/31/2016] [Indexed: 11/12/2022] Open
Abstract
Adhesives from marine organisms are often the source of inspiration for the development of glues able to create durable bonds in wet environments. In this work, we investigated the adhesive secretions produced by germlings of two large seaweed species from the South Pacific, Durvillaea antarctica, also named 'the strongest kelp in the word', and its close relative Hormosira banksii The comparative analysis was based on optical and scanning electron microscopy imaging as well as Fourier transform infrared (FTIR) spectroscopy and principal component analysis (PCA). For both species, the egg surface presents peripheral vesicles which are released soon after fertilization to discharge a primary adhesive. This is characterized by peaks representative of carbohydrate molecules. A secondary protein-based adhesive is then secreted in the early developmental stages of the germlings. Energy dispersive X-ray, FTIR and PCA indicate that D. antarctica secretions also contain sulfated moieties, and become cross-linked with time, both conferring strong adhesive and cohesive properties. On the other hand, H. banksii secretions are complemented by the putative adhesive phlorotannins, and are characterized by a simple mechanism in which all constituents are released with the same rate and with no apparent cross-linking. It is also noted that the release of adhesive materials appears to be faster and more copious in D. antarctica than in H. banksii Overall, this study highlights that both quantity and quality of the adhesives matter in explaining the superior attachment ability of D. antarctica.
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Affiliation(s)
- Simone Dimartino
- Department of Chemical and Process Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand Biomolecular Interaction Centre, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - David M Savory
- Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Sara J Fraser-Miller
- Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand The Dodd-Walls Centre, University of Otago, Dunedin 9054, New Zealand
| | - Keith C Gordon
- Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand The Dodd-Walls Centre, University of Otago, Dunedin 9054, New Zealand
| | - A James McQuillan
- Department of Chemistry, University of Otago, PO Box 56, Dunedin 9054, New Zealand
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18
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Creis E, Delage L, Charton S, Goulitquer S, Leblanc C, Potin P, Ar Gall E. Constitutive or Inducible Protective Mechanisms against UV-B Radiation in the Brown Alga Fucus vesiculosus? A Study of Gene Expression and Phlorotannin Content Responses. PLoS One 2015; 10:e0128003. [PMID: 26030665 PMCID: PMC4452539 DOI: 10.1371/journal.pone.0128003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 04/21/2015] [Indexed: 11/18/2022] Open
Abstract
A role as UV sunscreens has been suggested for phlorotannins, the phenolic compounds that accumulate in brown algae in response to a number of external stimuli and take part in cell wall structure. After exposure of the intertidal brown alga Fucus vesiculosus to artificial UV-B radiation, we examined its physiological responses by following the transcript level of the pksIII gene encoding a phloroglucinol synthase, likely to be involved in the first step of phlorotannins biosynthesis. We also monitored the expression of three targeted genes, encoding a heat shock protein (hsp70), which is involved in global stress responses, an aryl sulfotransferase (ast), which could be involved in the sulfation of phlorotannins, and a vanadium bromoperoxidase (vbpo), which can potentially participate in the scavenging of Reactive Oxygen Species (ROS) and in the cross-linking and condensation of phlorotannins. We investigated whether transcriptional regulation of these genes is correlated with an induction of phlorotannin accumulation by establishing metabolite profiling of purified fractions of low molecular weight phlorotannins. Our findings demonstrated that a high dose of UV-B radiation induced a significant overexpression of hsp70 after 12 and 24 hours following the exposure to the UV-B treatment, compared to control treatment. The physiological performance of algae quantified by the photosynthetic efficiency (Fv/Fm) was slightly reduced. However UV-B treatment did not induce the accumulation of soluble phlorotannins in F. vesiculosus during the kinetics of four weeks, a result that may be related to the lack of induction of the pksIII gene expression. Taken together these results suggest a constitutive accumulation of phlorotannins occurring during the development of F.vesiculosus, rather than inducible processes. Gene expression studies and phlorotannin profiling provide here complementary approaches to global quantifications currently used in studies of phenolic compounds in brown algae.
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Affiliation(s)
- Emeline Creis
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Ludovic Delage
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Sophie Charton
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Sophie Goulitquer
- Centre de Ressources de Biologie Marine, MetaboMer Mass Spectrometry Core Facility, CNRS FR2424, Station Biologique de Roscoff, 29688, Roscoff cedex, Brittany, France
| | - Catherine Leblanc
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, France
| | - Philippe Potin
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff cedex, 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, Institut Européen d’Etudes Marines-IUEM, 29280, Plouzané, Brittany, France
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Dimartino S, Mather AV, Alestra T, Nawada S, Haber M. Experimental and computational analysis of a novel flow channel to assess the adhesion strength of sessile marine organisms. Interface Focus 2015; 5:20140059. [PMID: 25657838 DOI: 10.1098/rsfs.2014.0059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Bioadhesives produced by marine macroalgae represent a potential source of inspiration for the development of water-resistant adhesives. Assessing their adhesion strength, however, remains difficult owing to low volumes of adhesive material produced, low solubility and rapid curing time. These difficulties can be circumvented by testing the adhesion strength of macroalgae propagules attached to a substrate. In this paper, we present a simple, novel flow channel used to test the adhesion strength of the germlings of the fucalean alga Hormosira banksii to four substrates of biomedical relevance (PMMA, agar, gelatin and gelatin + lipid). The adhesion strength of H. banksii germlings was found to increase in a time-dependent manner, with minimal adhesion success after a settlement period of 6 h and maximum adhesion strength achieved 24 h after initial settlement. Adhesion success increased most dramatically between 6 and 12 h settlement time, while no additional increase in adhesion strength was recorded for settlement times over 24 h. No significant difference in adhesion strength to the various substrates was observed. Computational fluid dynamics (CFD) was used to estimate the influence of fluid velocity and germling density on drag force acting on the settled organisms. CFD modelling showed that, on average, the drag force decreased with increasing germling number, suggesting that germlings would benefit from gregarious settlement behaviour. Collectively, our results contribute to a better understanding of the mechanisms allowing benthic marine organisms to thrive in hydrodynamically stressful environments and provide useful insights for further investigations.
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Affiliation(s)
- Simone Dimartino
- Department of Chemical and Process Engineering , University of Canterbury , Christchurch , New Zealand ; Biomolecular Interaction Centre , University of Canterbury , Christchurch , New Zealand
| | - Anton V Mather
- Department of Biological Sciences , University of Canterbury , Christchurch , New Zealand
| | - Tommaso Alestra
- Department of Biological Sciences , University of Canterbury , Christchurch , New Zealand
| | - Suhas Nawada
- Biomolecular Interaction Centre , University of Canterbury , Christchurch , New Zealand
| | - Meir Haber
- Biota Ltd , PO Box 220, Or Akiva 30600 , Israel
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Deniaud-Bouët E, Kervarec N, Michel G, Tonon T, Kloareg B, Hervé C. Chemical and enzymatic fractionation of cell walls from Fucales: insights into the structure of the extracellular matrix of brown algae. ANNALS OF BOTANY 2014; 114:1203-16. [PMID: 24875633 PMCID: PMC4195554 DOI: 10.1093/aob/mcu096] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 04/09/2014] [Indexed: 05/02/2023]
Abstract
BACKGROUND AND AIMS Brown algae are photosynthetic multicellular marine organisms evolutionarily distant from land plants, with a distinctive cell wall. They feature carbohydrates shared with plants (cellulose), animals (fucose-containing sulfated polysaccharides, FCSPs) or bacteria (alginates). How these components are organized into a three-dimensional extracellular matrix (ECM) still remains unclear. Recent molecular analysis of the corresponding biosynthetic routes points toward a complex evolutionary history that shaped the ECM structure in brown algae. METHODS Exhaustive sequential extractions and composition analyses of cell wall material from various brown algae of the order Fucales were performed. Dedicated enzymatic degradations were used to release and identify cell wall partners. This approach was complemented by systematic chromatographic analysis to study polymer interlinks further. An additional structural assessment of the sulfated fucan extracted from Himanthalia elongata was made. KEY RESULTS The data indicate that FCSPs are tightly associated with proteins and cellulose within the walls. Alginates are associated with most phenolic compounds. The sulfated fucans from H. elongata were shown to have a regular α-(1→3) backbone structure, while an alternating α-(1→3), (1→4) structure has been described in some brown algae from the order Fucales. CONCLUSIONS The data provide a global snapshot of the cell wall architecture in brown algae, and contribute to the understanding of the structure-function relationships of the main cell wall components. Enzymatic cross-linking of alginates by phenols may regulate the strengthening of the wall, and sulfated polysaccharides may play a key role in the adaptation to osmotic stress. The emergence and evolution of ECM components is further discussed in relation to the evolution of multicellularity in brown algae.
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Affiliation(s)
- Estelle Deniaud-Bouët
- Sorbonne Universités, UPMC Université Paris 06, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France CNRS, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France
| | - Nelly Kervarec
- Service RMN-RPE, UFR Sciences et Techniques, Université de Bretagne Occidentale (UBO), Avenue Le Gorgeu, 29200 Brest, France
| | - Gurvan Michel
- Sorbonne Universités, UPMC Université Paris 06, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France CNRS, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France
| | - Thierry Tonon
- Sorbonne Universités, UPMC Université Paris 06, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France CNRS, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France
| | - Bernard Kloareg
- Sorbonne Universités, UPMC Université Paris 06, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France CNRS, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France
| | - Cécile Hervé
- Sorbonne Universités, UPMC Université Paris 06, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France CNRS, UMR 8227 Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688 Roscoff cedex, France
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22
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Duarte A, Coelho J, Bordado J, Cidade M, Gil M. Surgical adhesives: Systematic review of the main types and development forecast. Prog Polym Sci 2012. [DOI: 10.1016/j.progpolymsci.2011.12.003] [Citation(s) in RCA: 168] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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23
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Paul C, Pohnert G. Production and role of volatile halogenated compounds from marine algae. Nat Prod Rep 2010; 28:186-95. [PMID: 21125112 DOI: 10.1039/c0np00043d] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Carsten Paul
- Friedrich Schiller University Jena, Department for Bioorganic Analytics, Lessingstraße 8, 07743, Jena, Germany
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La Barre S, Potin P, Leblanc C, Delage L. The halogenated metabolism of brown algae (Phaeophyta), its biological importance and its environmental significance. Mar Drugs 2010; 8:988-1010. [PMID: 20479964 PMCID: PMC2866472 DOI: 10.3390/md8040988] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 03/13/2010] [Accepted: 03/25/2010] [Indexed: 11/16/2022] Open
Abstract
Brown algae represent a major component of littoral and sublittoral zones in temperate and subtropical ecosystems. An essential adaptive feature of this independent eukaryotic lineage is the ability to couple oxidative reactions resulting from exposure to sunlight and air with the halogenations of various substrates, thereby addressing various biotic and abiotic stresses i.e., defense against predators, tissue repair, holdfast adhesion, and protection against reactive species generated by oxidative processes. Whereas marine organisms mainly make use of bromine to increase the biological activity of secondary metabolites, some orders of brown algae such as Laminariales have also developed a striking capability to accumulate and to use iodine in physiological adaptations to stress. We review selected aspects of the halogenated metabolism of macrophytic brown algae in the light of the most recent results, which point toward novel functions for iodide accumulation in kelps and the importance of bromination in cell wall modifications and adhesion properties of brown algal propagules. The importance of halogen speciation processes ranges from microbiology to biogeochemistry, through enzymology, cellular biology and ecotoxicology.
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Affiliation(s)
- Stéphane La Barre
- Université Pierre et Marie Curie-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France; E-Mails:
(P.P.);
(C.L.);
(L.D.)
- CNRS, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France
| | - Philippe Potin
- Université Pierre et Marie Curie-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France; E-Mails:
(P.P.);
(C.L.);
(L.D.)
- CNRS, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France
| | - Catherine Leblanc
- Université Pierre et Marie Curie-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France; E-Mails:
(P.P.);
(C.L.);
(L.D.)
- CNRS, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France
| | - Ludovic Delage
- Université Pierre et Marie Curie-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France; E-Mails:
(P.P.);
(C.L.);
(L.D.)
- CNRS, UMR 7139 Végétaux marins et Biomolécules, Station Biologique F-29682, Roscoff, France
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Bitton R, Josef E, Shimshelashvili I, Shapira K, Seliktar D, Bianco-Peled H. Phloroglucinol-based biomimetic adhesives for medical applications. Acta Biomater 2009; 5:1582-7. [PMID: 19272847 DOI: 10.1016/j.actbio.2008.10.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Revised: 09/07/2008] [Accepted: 10/01/2008] [Indexed: 11/16/2022]
Abstract
An adhesive that functions well under moist conditions could facilitate many surgical procedures. In recent studies we designed novel biomimetic glues which mimic the adhesion mechanism of algae, renowned for their remarkable adherence to wet surfaces. Here we extend our previous studies and propose biomimetic formulations, composed of alginate gel and native phloroglucinol, that do not induce cell cytotoxicity. Characterization of the adherence to tissues showed that adhesion was directly related to the mechanical strength of the cross-linked alginate. Therefore the adhesion strength can be altered by changing the source of the calcium cross-linker, the alginate G-content or the molecular weight of the alginate. The adhesion strength was comparable to that of Tisseel, a commercial tissue adhesive.
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Affiliation(s)
- Ronit Bitton
- Inter-Departmental Program for Biotechnology, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
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Salgado LT, Cinelli LP, Viana NB, Tomazetto de Carvalho R, De Souza Mourão PA, Teixeira VL, Farina M, Filho AGMA. A VANADIUM BROMOPEROXIDASE CATALYZES THE FORMATION OF HIGH-MOLECULAR-WEIGHT COMPLEXES BETWEEN BROWN ALGAL PHENOLIC SUBSTANCES AND ALGINATES(1). JOURNAL OF PHYCOLOGY 2009; 45:193-202. [PMID: 27033657 DOI: 10.1111/j.1529-8817.2008.00642.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The interaction between phenolic substances (PS) and alginates (ALG) has been suggested to play a role in the structure of the cell walls of brown seaweeds. However, no clear evidence for this interaction was reported. Vanadium bromoperoxidase (VBPO) has been proposed as a possible catalyst for the binding of PS to ALG. In this work, we studied the interaction between PS and ALG from brown algae using size exclusion chromatography (SEC) and optical tweezers microscopy. The analysis by SEC revealed that ALG forms a high-molecular-weight complex with PS. To study the formation of this molecular complex, we investigated the in vitro interaction of purified ALG from Fucus vesiculosus L. with purified PS from Padina gymnospora (Kütz.) Sond., in the presence or absence of VBPO. The interaction between PS and ALG only occurred when VBPO was added, indicating that the enzyme is essential for the binding process. The interaction of these molecules led to a reduction in ALG viscosity. We propose that VBPO promotes the binding of PS molecules to the ALG uronic acids residues, and we also suggest that PS are components of the brown algal cell walls.
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Affiliation(s)
- Leonardo Tavares Salgado
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
| | - Leonardo Paes Cinelli
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
| | - Nathan Bessa Viana
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
| | - Rodrigo Tomazetto de Carvalho
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
| | - Paulo Antônio De Souza Mourão
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
| | - Valéria Laneuville Teixeira
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
| | - Marcos Farina
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
| | - And Gilberto Menezes Amado Filho
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho (HUCFF), Instituto de Bioquímica Médica (IBqM), 21941-590, UFRJ, Rio de Janeiro, BrasilLaboratório de Pinças Ópticas-COPEA, ICB/Instituto de Física, 21941-972, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, BrasilLaboratório de Tecido Conjuntivo, HUCFF, IBqM, 21941-590, UFRJ, Rio de Janeiro, BrasilDepartamento de Biologia Marinha, Instituto de Biologia, 24001-970, Universidade Federal Fluminense, Niterói, BrasilLaboratório de Biomineralização, ICB, 21941-590, UFRJ, Rio de Janeiro, BrasilInstituto de Pesquisas Jardim Botânico do Rio de Janeiro, Diretoria de Pesquisas, MMA, 22460-030, Rio de Janeiro, Brasil
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Cosse A, Potin P, Leblanc C. Patterns of gene expression induced by oligoguluronates reveal conserved and environment-specific molecular defense responses in the brown alga Laminaria digitata. THE NEW PHYTOLOGIST 2009; 182:239-250. [PMID: 19192194 DOI: 10.1111/j.1469-8137.2008.02745.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
* Until now, no information has been available on the transcriptional response to the transduction of defense signals in brown seaweeds that leads to active resistance against pathogens or grazers. * Using a polymerase chain reaction (PCR)-based, subtractive cDNA approach combined with filter arrays we demonstrated that Laminaria digitata exhibits a rapid response to oligoguluronate elicitors. The transcription levels of several genes were validated by quantitative real-time reverse-transcription PCR and further analysed using pharmacological approaches. * Fifty upregulated genes were identified by differential screening in elicited algae over a 24-h time-course. These genes were related to oxidative stress responses, production of antimicrobial secondary compounds or cell wall strengthening. Moreover, pharmacological tests showed that intracellular signal transduction is likely to involve reactive oxygen species. A new oligoguluronate-inducible vanadium-dependent haloperoxidase (vHPO), specific to iodide was also characterized. The transcription of several vHPO genes was shown to be tightly regulated. * Taken together, our data show that early transcriptional defense responses in L. digitata are similar to those in land plants but also include novel defense responses that involve tightly regulated iodine metabolism.
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Affiliation(s)
- Audrey Cosse
- Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie et Curie (UPMC)-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique, BP 74, F-29682, Roscoff, France
| | - Philippe Potin
- Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie et Curie (UPMC)-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique, BP 74, F-29682, Roscoff, France
| | - Catherine Leblanc
- Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie et Curie (UPMC)-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique, BP 74, F-29682, Roscoff, France
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Bitton R, Berglin M, Elwing H, Colin C, Delage L, Potin P, Bianco-Peled H. The influence of halide-mediated oxidation on algae-born adhesives. Macromol Biosci 2007; 7:1280-9. [PMID: 17724788 DOI: 10.1002/mabi.200700099] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Adhesive materials extracted from the brown algae Fucus Serratus were studied. These adhesives are composed of cross-linked alginate and polyphenols oxidized in the presence of KI or KBr. All formulations were capable of adhering to a variety of surfaces, however the adhesion properties were influenced by the halide used. SAXS and TEM experiments revealed that oxidized polyphenols self-assemble into chain-like objects, irrespective of the oxidation conditions. Yet, slight differences in the aggregate size were detected. QCM-D results showed that the kinetics of the oxidation was faster with iodide than with bromide. Moreover, oxidation with iodide generates stiffer networks, suggesting that the interaction between the alginate and the polyphenol could be the cause of the reduced adhesion.
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Affiliation(s)
- Ronit Bitton
- Inter-Departmental program for Biotechnology, Technion-Israel Institute of Technology, Israel
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