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Schultz J, Berry Gobler DL, Young CS, Perez A, Doall MH, Gobler CJ. Ocean acidification significantly alters the trace element content of the kelp, Saccharina latissima. MARINE POLLUTION BULLETIN 2024; 202:116289. [PMID: 38564822 DOI: 10.1016/j.marpolbul.2024.116289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 03/05/2024] [Accepted: 03/20/2024] [Indexed: 04/04/2024]
Abstract
Seaweeds are ecosystem engineers that can serve as habitat, sequester carbon, buffer ecosystems against acidification, and, in an aquaculture setting, represent an important food source. One health issue regarding the consumption of seaweeds and specifically, kelp, is the accumulation of some trace elements of concern within tissues. As atmospheric CO2 concentrations rise, and global oceans acidify, the concentrations of elements in seawater and kelp may change. Here, we cultivated the sugar kelp, Saccharina latissima under ambient (~400 μatm) and elevated pCO2 (600-2400 μatm) conditions and examined the accumulation of trace elements using x-ray powder diffraction, sub-micron resolution x-ray imaging, and inductively coupled plasma mass spectrometry. Exposure of S. latissima to higher concentrations of pCO2 and lower pH caused a significant increase (p < 0.05) in the iodine and arsenic content of kelp along with increased subcellular heterogeneity of these two elements as well as bromine. The iodine-to‑calcium and bromine-to‑calcium ratios of kelp also increased significantly under high CO2/low pH (p < 0.05). In contrast, high CO2/low pH significantly reduced levels of copper and cadmium in kelp tissue (p < 0.05) and there were significant inverse correlations between concentrations of pCO2 and concentrations of cadmium and copper in kelp (p < 0.05). Changes in copper and cadmium levels in kelp were counter to expected changes in their free ionic concentrations in seawater, suggesting that the influence of low pH on algal physiology was an important control on the elemental content of kelp. Collectively, these findings reveal the complex effects of ocean acidification on the elemental composition of seaweeds and indicate that the elemental content of seaweeds used as food must be carefully monitored as climate change accelerates this century.
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Affiliation(s)
- Jack Schultz
- Vanderbilt University, Department of Biological Sciences, Nashville, TN 37235, United States of America; Westhampton Beach High School, Westhampton Beach, NY 11978, United States of America
| | - Dianna L Berry Gobler
- Westhampton Beach High School, Westhampton Beach, NY 11978, United States of America; Stony Brook University, School of Marine and Atmospheric Sciences, Southampton, NY 11968, United States of America
| | - Craig S Young
- Stony Brook University, School of Marine and Atmospheric Sciences, Southampton, NY 11968, United States of America
| | - Aleida Perez
- Brookhaven National Laboratory, Department of Educational Programs Upton, NY 11973, United States of America
| | - Michael H Doall
- Stony Brook University, School of Marine and Atmospheric Sciences, Southampton, NY 11968, United States of America
| | - Christopher J Gobler
- Stony Brook University, School of Marine and Atmospheric Sciences, Southampton, NY 11968, United States of America.
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2
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Zhang Y, Cao H, Wang M, Zou Z, Zhou P, Wang X, Jin J. A review of iodine in plants with biofortification: Uptake, accumulation, transportation, function, and toxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:163203. [PMID: 37004776 DOI: 10.1016/j.scitotenv.2023.163203] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/26/2023] [Accepted: 03/28/2023] [Indexed: 05/13/2023]
Abstract
Iodine deficiency can cause thyroid disease, a serious health problem that has been affecting humans since several years. The biofortification of plants with iodine is an effective strategy for regulating iodine content in humans. In addition, radioiodine released into the atmosphere may contaminate terrestrial ecosystem along with dry or wet deposition and its accumulation in plants may cause exposure risks to humans via food chain. Recent progress in understanding the mechanisms related to iodine uptake, elementary speciation, dynamic transportation, nutritional role, and toxicity in plants is reviewed here. First, we introduced the iodine cycle in a marine-atmosphere-land system. The content and speciation of iodine in plants under natural conditions and biofortification backgrounds were also analyzed. We then discussed the mechanisms of iodine uptake and efflux by plants. The promotion or inhibition effects of iodine on plant growth were also investigated. Finally, the participation of radioiodine in plant growth and its safety risks along the food chain were evaluated. Furthermore, future challenges and opportunities for understanding the participation of iodine in plants have been outlined.
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Affiliation(s)
- Yue Zhang
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Han Cao
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Min Wang
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Ziwei Zou
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Pingfan Zhou
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiangxue Wang
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Jie Jin
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
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Gribble GW. Naturally Occurring Organohalogen Compounds-A Comprehensive Review. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 121:1-546. [PMID: 37488466 DOI: 10.1007/978-3-031-26629-4_1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number-from fewer than 25 in 1968-to approximately 8000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA.
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4
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Fievet B, Voiseux C, Leblanc C, Maro D, Hebert D, Solier L, Godinot C. Iodine uptake in brown seaweed exposed to radioactive liquid discharges from the reprocessing plant of ORANO La Hague. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2023; 256:107045. [PMID: 36308944 DOI: 10.1016/j.jenvrad.2022.107045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 10/03/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
Iodine-129 is present in controlled liquid radioactive waste routinely released in seawater by the ORANO nuclear fuel reprocessing plant in La Hague (Normandy, France). Brown algae are known for their exceptional ability to concentrate iodine from seawater. They also potentially emit volatile iodine compounds in response to various stresses, such as during emersion at low tide. For these reasons, brown seaweed is routinely collected for radioactivity monitoring in the marine environment (Fucus serratus and Laminaria digitata). Despite the high concentration ratio, the exact mechanism of iodine uptake is still unclear. Chemical imaging by laser desorption/ionization mass spectrometry provided evidence that iodine is stored by kelps as I-. In this study we investigate in vivo iodine uptake in kelps (L. digitata) with an emphasis on seawater iodine chemical speciation. Our results showed that kelp plantlets were able to take up iodine in the forms of both IO3- and I-. We also observed transient net efflux of I- back to seawater but no IO3- efflux. Since the seaweed stores I- but takes up both IO3- and I-, IO3- was likely to be converted into I- at some point in the plantlet. One major outcome of our experiments was the direct observation of the kelp-based biogenic conversion of seawater IO3- into I-. On the basis of both IO3- and I- uptakes by the seaweed, we propose new steps in the possible iodine concentration mechanism used by brown algae.
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Affiliation(s)
- Bruno Fievet
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LRC, Laboratoire de Radioécologie de Cherbourg-Octeville, F-50130, Cherbourg-Octeville, France
| | - Claire Voiseux
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LRC, Laboratoire de Radioécologie de Cherbourg-Octeville, F-50130, Cherbourg-Octeville, France
| | - Catherine Leblanc
- Sorbonne Université, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, Roscoff, France
| | - Denis Maro
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LRC, Laboratoire de Radioécologie de Cherbourg-Octeville, F-50130, Cherbourg-Octeville, France
| | - Didier Hebert
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LRC, Laboratoire de Radioécologie de Cherbourg-Octeville, F-50130, Cherbourg-Octeville, France
| | - Luc Solier
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LRC, Laboratoire de Radioécologie de Cherbourg-Octeville, F-50130, Cherbourg-Octeville, France
| | - Claire Godinot
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SRTE/LRC, Laboratoire de Radioécologie de Cherbourg-Octeville, F-50130, Cherbourg-Octeville, France.
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New Insights into Microbial Degradation of Cyanobacterial Organic Matter Using a Fractionation Procedure. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19126981. [PMID: 35742228 PMCID: PMC9222324 DOI: 10.3390/ijerph19126981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 02/06/2023]
Abstract
Cyanobacterial blooms caused by phytoplankton Microcystis have occurred successively since 1980 in Lake Taihu, China, which has led to difficulty collecting clean drinking water. The effects of cyanobacterial scum-derived dissolved organic matter (DOM) on microbial population variations and of algal-derived filtrate and algal residual exudative organic matter caused by the fraction procedure on nutrient mineralization are unclear. This study revealed the microbial-regulated transformation of DOM from a high-molecular-weight labile to a low-molecular-weight recalcitrant, which was characterized by three obvious stages. The bioavailability of DOM derived from cyanobacterial scum by lake microbes was investigated during 80-d dark degradation. Carbon substrates provided distinct growth strategy links to the free-living bacteria abundance variation, and this process was coupled with the regeneration of different forms of inorganic nutrients. The carryover effects of Microcystis cyanobacteria blooms can exist for a long time. We also found the transformation of different biological availability of DOM derived from two different cyanobacterial DOM fractions, which all coupled with the regeneration of different forms of inorganic nutrients. Our study provides new insights into the microbial degradation of cyanobacterial organic matter using a fractionation procedure, which suggests that the exudate and lysate from degradation products of cyanobacteria biomass have heterogeneous impacts on DOM cycling in aquatic environments.
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Grzanka M, Smoleń S, Skoczylas Ł, Grzanka D. Synthesis of Organic Iodine Compounds in Sweetcorn under the Influence of Exogenous Foliar Application of Iodine and Vanadium. Molecules 2022; 27:molecules27061822. [PMID: 35335186 PMCID: PMC8950039 DOI: 10.3390/molecules27061822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/04/2022] [Accepted: 03/07/2022] [Indexed: 11/16/2022] Open
Abstract
A human’s diet should be diverse and rich in vitamins, macro- and microelements essential for the proper functioning of the human body. Globally, a high percentage of the human population suffers from malnutrition, deficiencies of nutrients and vitamins also known as the problem of hidden hunger. This problem it is not only common in poor countries, but also occurs in developed countries. Iodine is a nutrient crucial for the proper functioning of the human and animal body. For plants, it is referred to as a beneficial element or even a microelement. The design of the biofortification experiment was determined on the basis of the interaction of iodine and vanadium (synergistic interaction in marine algae), where vanadium-dependent iodoperoxidase catalyzes apoplastic oxidation of iodine, resulting in high efficiency of iodine uptake and accumulation in brown algae (Laminaria digitate). Three independent experiments (Exp.) were carried out with the foliar application of vanadium (V) and iodine (I) compounds. The main differences between the experiments with the adapted proper corn biofortification method were the different application stage between the individual experiments, the application intervals and the dose of the iodine–vanadium compound. In each experiment, the accumulation of iodine and vanadium in the grain was several times lower than in the leaves. The combination iodine and vanadium significantly increased the accumulation of iodine in the grain in the case of applying V with inorganic iodine compounds, and a decrease in the accumulation of I after applying V with organic iodine compound —especially in Exp. No. 3. In grain, the highest content of I−, IO3− was in combination with the application of 2-iodobenzoic acid (products of its metabolism). In most of the tested combinations, vanadium stimulated the accumulation/synthesis of exogenous/endogenous 5-iodosalicylic acid (5ISA) and 2-iodobenzoic acid (2IBeA), respectively, and decreased the content of 2,3,5-triiodobenzoic acid (2,3,5-triIBeA) in leaves and grains. The tested compounds I and V and the combinations of their application had a diversified effect on the vitamin C content in the grains. Vanadium in the lower dose of 0.1 µM significantly increased the sugar content in the grain.
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Affiliation(s)
- Marlena Grzanka
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Al. 29 Listopada 54, 31-425 Krakow, Poland; (S.S.); (D.G.)
- Correspondence: or
| | - Sylwester Smoleń
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Al. 29 Listopada 54, 31-425 Krakow, Poland; (S.S.); (D.G.)
| | - Łukasz Skoczylas
- Department of Plant Product Technology and Nutrition Hygiene, Faculty of Food Technology, University of Agriculture in Krakow, Balicka 122, 30-149 Krakow, Poland;
| | - Dominik Grzanka
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Al. 29 Listopada 54, 31-425 Krakow, Poland; (S.S.); (D.G.)
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7
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Blikra MJ, Henjum S, Aakre I. Iodine from brown algae in human nutrition, with an emphasis on bioaccessibility, bioavailability, chemistry, and effects of processing: A systematic review. Compr Rev Food Sci Food Saf 2022; 21:1517-1536. [PMID: 35233943 DOI: 10.1111/1541-4337.12918] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 11/29/2022]
Abstract
Brown algae are becoming increasingly popular as a food source and dietary supplement in Europe and other Western countries. As they are highly rich in iodine, they represent a potential new dietary iodine source. Iodine deficiency has been re-emerging in Europe, and it is important to ensure adequate intake through one's diet. However, macroalgae, and especially brown algae, may contain very high amounts of iodine, and both iodine deficiency and excessive iodine may increase the risk of negative health effects. The iodine content of algae or foods containing algae is currently not regulated in the European Union. The aim of this paper is to review the literature to determine the chemical species of iodine in brown algae, the loss of iodine during processing, and the bioavailability and bioaccessibility of iodine. A systematic search of the literature was performed in April 2021, via the databases Web of Science and PubMed. The review includes studies of iodine in brown macroalgae in relation to bioavailability, bioaccessibility, processing and speciation. A meta-analysis was conducted in relation to the following topics: (i) the correlation between total iodine and iodide (I- ) content in brown algae; (ii) the correlation between the loss of iodine during processing and the I- content; and (iii) the correlation between bioavailability and the I- content. The bioavailability of iodine from brown algae was generally high, with in vivo bioavailability ranging from 31% to 90%. The in vitro bioavailability of iodine (2%-28%) was systematically lower than in vivo bioavailability (31%-90%), indicating an inadequate in vitro methodology. Processing may reduce the iodine content of brown algae, and a higher I- content was positively correlated with increased iodine loss during processing. Although processing strategies may reduce the iodine content of brown algae significantly, the iodine content may still be high after processing. These findings may be used in food safety evaluations of brown algae as well as in the development of macroalgae-containing foods with iodine contents suitable for human consumption. Further research on processing techniques to reduce the iodine content in brown macroalgae are warranted.
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Affiliation(s)
| | - Sigrun Henjum
- Department of Nursing and Health Promotion, Oslo Metropolitan University (OsloMet), Oslo, Norway
| | - Inger Aakre
- Department of Seafood and Nutrition, Institute of Marine Research, Bergen, Norway
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Duborská E, Balíková K, Matulová M, Zvěřina O, Farkas B, Littera P, Urík M. Production of Methyl-Iodide in the Environment. Front Microbiol 2021; 12:804081. [PMID: 35003036 PMCID: PMC8733467 DOI: 10.3389/fmicb.2021.804081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 12/06/2021] [Indexed: 11/13/2022] Open
Abstract
Iodine is an essential micronutrient for most of the living beings, including humans. Besides its indispensable role in animals, it also plays an important role in the environment. It undergoes several chemical and biological transformations resulting in the production of volatile methylated iodides, which play a key role in the iodine's global geochemical cycle. Since it can also mitigate the process of climate change, it is reasonable to study its biogeochemistry. Therefore, the aim of this review is to provide information on its origin, global fluxes and mechanisms of production in the environment.
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Affiliation(s)
- Eva Duborská
- Faculty of Natural Sciences, Institute of Laboratory Research on Geomaterials, Comenius University in Bratislava, Bratislava, Slovakia
| | - Katarína Balíková
- Faculty of Natural Sciences, Institute of Laboratory Research on Geomaterials, Comenius University in Bratislava, Bratislava, Slovakia
| | - Michaela Matulová
- Faculty of Natural Sciences, Institute of Laboratory Research on Geomaterials, Comenius University in Bratislava, Bratislava, Slovakia
| | - Ondřej Zvěřina
- Department of Public Health, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Bence Farkas
- Faculty of Natural Sciences, Institute of Laboratory Research on Geomaterials, Comenius University in Bratislava, Bratislava, Slovakia
| | - Pavol Littera
- Faculty of Natural Sciences, Institute of Laboratory Research on Geomaterials, Comenius University in Bratislava, Bratislava, Slovakia
| | - Martin Urík
- Faculty of Natural Sciences, Institute of Laboratory Research on Geomaterials, Comenius University in Bratislava, Bratislava, Slovakia
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Role and Evolution of the Extracellular Matrix in the Acquisition of Complex Multicellularity in Eukaryotes: A Macroalgal Perspective. Genes (Basel) 2021; 12:genes12071059. [PMID: 34356075 PMCID: PMC8307928 DOI: 10.3390/genes12071059] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/05/2021] [Accepted: 07/08/2021] [Indexed: 12/12/2022] Open
Abstract
Multicellular eukaryotes are characterized by an expanded extracellular matrix (ECM) with a diversified composition. The ECM is involved in determining tissue texture, screening cells from the outside medium, development, and innate immunity, all of which are essential features in the biology of multicellular eukaryotes. This review addresses the origin and evolution of the ECM, with a focus on multicellular marine algae. We show that in these lineages the expansion of extracellular matrix played a major role in the acquisition of complex multicellularity through its capacity to connect, position, shield, and defend the cells. Multiple innovations were necessary during these evolutionary processes, leading to striking convergences in the structures and functions of the ECMs of algae, animals, and plants.
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Zhang X, Zhang J, Wang Y, Xu D, Fan X, Zhang Y, Ma J, Ye N. The oxylipin messenger 1-octen-3-ol induced rapid responses in kelp Macrocystis pyrifera. PHYSIOLOGIA PLANTARUM 2021; 172:1641-1652. [PMID: 33547806 DOI: 10.1111/ppl.13358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/27/2021] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
Oxylipins are important oxygenated derivatives of fatty acids that regulate a variety of plant physiological and pathological processes in response to specific external challenges. A large body of evidence has indicated that algae can also produce a surprisingly diverse array of volatile oxylipins, yet little is known about the roles of volatile oxylipins as defense signals in macroalgae. In this study, the kelp Macrocystis pyrifera was treated by the oxylipin messenger 1-octen-3-ol and then a genome-wide gene expression profile and fatty acid spectrum analysis were performed. We found that M. pyrifera responded rapidly to the exposure of the oxylipin messenger 1-octen-3-ol. It regulated the expression levels of genes mainly involved in signal transduction, lipid metabolism, oxidation prevention, cell wall synthesis, photosynthesis, and development. Moreover, 1-octen-3-ol treatments decreased several types of total fatty acid contents and increased free fatty acid contents, especially for the C18 and C20 fatty acids. In addition, it decreased the content of indole-3-acetic acid, abscisic acid, and zeatin and increased the gibberellic acid content. Our findings demonstrated that 1-octen-3-ol is an available inducer for M. pyrifera, which is capable of rapidly upregulating kelp's defense response.
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Affiliation(s)
- Xiaowen Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Jian Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Yitao Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Dong Xu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Xiao Fan
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Yan Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Jian Ma
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Naihao Ye
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
- Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Smoleń S, Czernicka M, Kowalska I, Kȩska K, Halka M, Grzebelus D, Grzanka M, Skoczylas Ł, Pitala J, Koronowicz A, Kováčik P. New Aspects of Uptake and Metabolism of Non-organic and Organic Iodine Compounds-The Role of Vanadium and Plant-Derived Thyroid Hormone Analogs in Lettuce. FRONTIERS IN PLANT SCIENCE 2021; 12:653168. [PMID: 33936138 PMCID: PMC8086602 DOI: 10.3389/fpls.2021.653168] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/19/2021] [Indexed: 05/26/2023]
Abstract
The process of uptake and translocation of non-organic iodine (I) ions, I- and IO3 -, has been relatively well-described in literature. The situation is different for low-molecular-weight organic aromatic I compounds, as data on their uptake or metabolic pathway is only fragmentary. The aim of this study was to determine the process of uptake, transport, and metabolism of I applied to lettuce plants by fertigation as KIO3, KIO3 + salicylic acid (KIO3+SA), and iodosalicylates, 5-iodosalicylic acid (5-ISA) and 3,5-diiodosalicylic acid (3,5-diISA), depending on whether additional fertilization with vanadium (V) was used. Each I compound was applied at a dose of 10 μM, SA at a dose of 10 μM, and V at a dose of 0.1 μM. Three independent 2-year-long experiments were carried out with lettuce; two with pot systems using a peat substrate and mineral soil and one with hydroponic lettuce. The effectiveness of I uptake and translocation from the roots to leaves was as follows: 5-ISA > 3,5-diISA > KIO3. Iodosalicylates, 5-ISA and 3,5-diISA, were naturally synthesized in plants, similarly to other organic iodine metabolites, i.e., iodotyrosine, as well as plant-derived thyroid hormone analogs (PDTHA), triiodothyronine (T3) and thyroxine (T4). T3 and T4 were synthesized in roots with the participation of endogenous and exogenous 5-ISA and 3,5-diISA and then transported to leaves. The level of plant enrichment in I was safe for consumers. Several genes were shown to perform physiological functions, i.e., per64-like, samdmt, msams5, and cipk6.
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Affiliation(s)
- Sylwester Smoleń
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Małgorzata Czernicka
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Iwona Kowalska
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Kinga Kȩska
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Maria Halka
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Dariusz Grzebelus
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Marlena Grzanka
- Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Łukasz Skoczylas
- Department of Plant Product Technology and Nutrition Hygiene, Faculty of Food Technology, University of Agriculture in Krakow, Kraków, Poland
| | - Joanna Pitala
- Laboratory of Mass Spectrometry, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland
| | - Aneta Koronowicz
- Department of Human Nutrition and Dietetics, Faculty of Food Technology, University of Agriculture in Krakow, Kraków, Poland
| | - Peter Kováčik
- Department of Agrochemistry and Plant Nutrition, Slovak University of Agriculture in Nitra, Nitra, Slovakia
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12
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Fiévet B, Bailly du Bois P, Voiseux C, Godinot C, Cazimajou O, Solier L, De Vismes Ott A, Cossonnet C, Habibi A, Fleury S. A comprehensive assessment of two-decade radioactivity monitoring around the Channel Islands. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2020; 223-224:106381. [PMID: 32912704 DOI: 10.1016/j.jenvrad.2020.106381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/04/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
The Channel Islands are located in the Normand-Breton Gulf (NBG), in the mid-part of the English Channel (France, Normandy). In the northern part, off Cap La Hague, controlled amounts of radioactive liquid waste are discharged by the ORANO La Hague nuclear fuel reprocessing plant (RP). Radionuclides were monitored in the NBG to assess the dispersion of radioactive discharges from the RP in the marine environment. The temporal and spatial distribution of the data are consistent with the history of the discharges, with most gamma emitter radionuclide environmental levels being close to or below the current limits of detection. A clear fingerprint of H-3, C-14 and I-129 radionuclides discharged from the RP is measured. The hydrodynamics in the NBG do not yield a simple gradient with linear distance from the outfall of the RP. Modelling tools were used to understand how radioactive discharges spread from the source of input. Dispersion patterns clearly illustrate the different behaviours of soluble and non-soluble radionuclides. The study indicated that the footprint of radioactive liquid discharges by French nuclear facilities was still measurable in species collected from the NBG for the mostly dissolved radionuclides. The less conservative ones, with a high affinity for suspended matter, are potentially influenced by old releases. These pathways could be investigated by dedicated hydrodynamic dispersion models. Overall, in the Channel Islands the levels are low and consistent with the general decrease in liquid radionuclide discharges by the RP since the 1990s.
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Affiliation(s)
- Bruno Fiévet
- Laboratoire de Radioécologie de Cherbourg-Octeville, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SRTE, Rue Max Pol Fouchet, BP10, 50130, Cherbourg-en-Cotentin, France.
| | - Pascal Bailly du Bois
- Laboratoire de Radioécologie de Cherbourg-Octeville, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SRTE, Rue Max Pol Fouchet, BP10, 50130, Cherbourg-en-Cotentin, France.
| | - Claire Voiseux
- Laboratoire de Radioécologie de Cherbourg-Octeville, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SRTE, Rue Max Pol Fouchet, BP10, 50130, Cherbourg-en-Cotentin, France.
| | - Claire Godinot
- Laboratoire de Radioécologie de Cherbourg-Octeville, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SRTE, Rue Max Pol Fouchet, BP10, 50130, Cherbourg-en-Cotentin, France.
| | - Olivier Cazimajou
- Laboratoire de Radioécologie de Cherbourg-Octeville, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SRTE, Rue Max Pol Fouchet, BP10, 50130, Cherbourg-en-Cotentin, France.
| | - Luc Solier
- Laboratoire de Radioécologie de Cherbourg-Octeville, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SRTE, Rue Max Pol Fouchet, BP10, 50130, Cherbourg-en-Cotentin, France.
| | - Anne De Vismes Ott
- Laboratoire de Mesure de la Radioactivité dans l'Environnement, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SAME, Bât. 501, Bois des Rames, Rue du Belvédère, 91400, Orsay, France.
| | - Catherine Cossonnet
- Laboratoire de Mesure de la Radioactivité dans l'Environnement, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SAME, Bât. 501, Bois des Rames, Rue du Belvédère, 91400, Orsay, France.
| | - Azza Habibi
- Laboratoire d'Expertise, de Radiochimie et de Chimie Analytique, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SAME, Bât. C4, 31 Rue de l'Écluse, BP 40035, 78116, Le Vésinet Cedex, France.
| | - Sandrine Fleury
- Laboratoire de Mesure Nucléaire, Institut de Radioprotection et de Sûreté Nucléaire/PSE-ENV/SAME, Bât. C4, 31 Rue de l'Écluse, BP 40035, 78116, Le Vésinet Cedex, France.
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Abstract
The urgent need to replace fossil fuels has seen macroalgae advancing as a potential feedstock for anaerobic digestion. The natural methane productivity (dry weight per hectare) of seaweeds is greater than in many terrestrial plant systems. As part of their defence systems, seaweeds, unlike terrestrial plants, produce a range of halogenated secondary metabolites, especially chlorinated and brominated compounds. Some orders of brown seaweeds also accumulate iodine, up to 1.2% of their dry weight. Fluorine remains rather unusual within the chemical structure. Halogenated hydrocarbons have moderate to high toxicities. In addition, halogenated organic compounds constitute a large group of environmental chemicals due to their extensive use in industry and agriculture. In recent years, concerns over the environmental fate and release of these halogenated organic compounds have resulted in research into their biodegradation and the evidence emerging shows that many of these compounds are more easily degraded under strictly anaerobic conditions compared to aerobic biodegradation. Biosorption via seaweed has become an alternative to the existing technologies in removing these pollutants. Halogenated compounds are known inhibitors of methane production from ruminants and humanmade anaerobic digesters. The focus of this paper is reviewing the available information on the effects of halogenated organic compounds on anaerobic digestion.
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Nieto-Domínguez M, Nikel PI. Intersecting Xenobiology and Neometabolism To Bring Novel Chemistries to Life. Chembiochem 2020; 21:2551-2571. [PMID: 32274875 DOI: 10.1002/cbic.202000091] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/09/2020] [Indexed: 12/19/2022]
Abstract
The diversity of life relies on a handful of chemical elements (carbon, oxygen, hydrogen, nitrogen, sulfur and phosphorus) as part of essential building blocks; some other atoms are needed to a lesser extent, but most of the remaining elements are excluded from biology. This circumstance limits the scope of biochemical reactions in extant metabolism - yet it offers a phenomenal playground for synthetic biology. Xenobiology aims to bring novel bricks to life that could be exploited for (xeno)metabolite synthesis. In particular, the assembly of novel pathways engineered to handle nonbiological elements (neometabolism) will broaden chemical space beyond the reach of natural evolution. In this review, xeno-elements that could be blended into nature's biosynthetic portfolio are discussed together with their physicochemical properties and tools and strategies to incorporate them into biochemistry. We argue that current bioproduction methods can be revolutionized by bridging xenobiology and neometabolism for the synthesis of new-to-nature molecules, such as organohalides.
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Affiliation(s)
- Manuel Nieto-Domínguez
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
| | - Pablo I Nikel
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
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15
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Satoh Y, Imai S. Evaluation of dissolution flux of iodine from brackish lake sediments under different temperature and oxygenic conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 707:135920. [PMID: 31865086 DOI: 10.1016/j.scitotenv.2019.135920] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 11/15/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
Dissolution flux of iodine from aquatic sediments in a brackish lake (Lake Obuchi), facing the Pacific Ocean and adjacent to a nuclear fuel reprocessing plant in northeast Japan, was evaluated using incubation experiments on sediment core samples. The experiments were performed under three different temperatures (29, 17, and 6 °C) and oxygenic (air flow, N2 gas flow, and untreated) conditions for 48 h. The total dissolved iodine (TDI) concentration (i.e., the sum of iodide, iodate, and dissolved organic iodine, DOI) increased under all temperatures and oxygenic conditions in the first 6 h of incubation. From 6 to 27 h, noticeable increases in TDI concentration only occurred at high temperatures. Dissolution fluxes of iodine estimated by linear regression analysis of the measured TDI concentration in the first 6 h were always higher than those estimated in the first 27 h. This result indicates that dissolution flux of iodine should be evaluated through short-term (within several hours) incubation experiments because absorption reactions which transport iodine from the overlying water back to the sediment become active in the long-term. No substantial difference in dissolution flux, estimated by TDI concentration, was observed under different oxygenic conditions in the first 6 h. However, dissolution flux increased significantly with an increase in temperature. Increases in flux and temperature were significantly and positively correlated (R2 = 0.90), suggesting that temperature was the dominant factor that regulated iodine flux during the incubation. Changes in TDI concentration at all temperatures and oxygenic conditions corresponded to those in iodide concentration, indicating that iodide was the main form of iodine dissolved from the sediments. In later stages of the experiments, from 27 to 48 h, the TDI concentration in overlying water increased only at high temperature, while concentrations at medium and low temperatures remained constant or decreased. In particular, oxic experiments showed substantial decreases in iodide concentration at medium and low temperatures. This suggests that oxic conditions promote the absorption of iodine from the overlying water to the sediments. Finally, the dissolution flux of radioiodine (iodine-129) from the sediments of Lake Obuchi to the overlying water was estimated by combining these results with data from earlier studies. The results suggest that only 0.006% of the iodine-129 accumulated in the sediments is released through dissolution to the overlying water per year, suggesting that this radioactive isotope is essentially stable in the sediments.
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Affiliation(s)
- Yuhi Satoh
- Department of Radioecology, Institute for Environmental Sciences (IES), 1-7 Rokkasho, Aomori 039-3212, Japan.
| | - Shoko Imai
- Department of Radioecology, Institute for Environmental Sciences (IES), 1-7 Rokkasho, Aomori 039-3212, Japan.
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16
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Ali J, Tuzen M, Kazi TG. Green and innovative technique develop for the determination of vanadium in different types of water and food samples by eutectic solvent extraction method. Food Chem 2020; 306:125638. [DOI: 10.1016/j.foodchem.2019.125638] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 05/29/2019] [Accepted: 10/01/2019] [Indexed: 10/25/2022]
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Halka M, Smoleń S, Czernicka M, Klimek-Chodacka M, Pitala J, Tutaj K. Iodine biofortification through expression of HMT, SAMT and S3H genes in Solanum lycopersicum L. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 144:35-48. [PMID: 31557638 DOI: 10.1016/j.plaphy.2019.09.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/17/2019] [Accepted: 09/17/2019] [Indexed: 05/20/2023]
Abstract
The uptake process and physiological reaction of plants to aromatic iodine compounds have not yet been documented. The aim of this research was to compare uptake by tomato plants of KI and KIO3, as well as of organic iodine compounds - 5-ISA (5-iodosalicylic acid), 3,5-diISA (3,5-diiodosalicylic acid), 2-IBeA (2-iodobenzoic acid), 4-IBeA (4-iodobenzoic acid) and 2,3,5-triIBeA (2,3,5-triiodobenzoic acid). Only 2,3,5-triIBeA had a negative influence on plant development. All organic iodine compounds were taken up by roots and transported to leaves and fruits. Among all the compounds applied, the most efficiently transferred iodine was 2-IBeA - to fruits, and 4-IBeA - to leaves. The order of iodine accumulation in fruit cell compartments was as follows: organelles > cell walls > soluble portions of cells; for leaf and root cells, it was: organelles > cell walls or soluble portions, depending on the compound applied. The compounds studied influence iodine metabolism through expression of the HMT gene which encodes halide ion methyltransferase in leaves and roots. Also, their influence on modification of the activity of the SAMT and S3H genes that encode salicylic acid carboxyl methyltransferase and salicylic acid 3-hydroxylase was established. It was discovered that exogenously applied 5-ISA, 3,5-diISA, 2-IBeA and 4-IBeA are genuinely (endogenously) synthesised in tomato plants; to date, this has not been described for the tomato, nor for any other species of higher plant.
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Affiliation(s)
- Mariya Halka
- Unit of Plant Nutrition, Institute of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Al. 29 Listopada 54, 31-425, Krakow, Poland.
| | - Sylwester Smoleń
- Unit of Plant Nutrition, Institute of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Al. 29 Listopada 54, 31-425, Krakow, Poland; Laboratory of Mass Spectrometry, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland.
| | - Małgorzata Czernicka
- Unit of Genetics, Plant Breeding and Seed Science, Institute of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland.
| | - Magdalena Klimek-Chodacka
- Unit of Genetics, Plant Breeding and Seed Science, Institute of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland.
| | - Joanna Pitala
- Laboratory of Mass Spectrometry, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Kraków, Poland.
| | - Krzysztof Tutaj
- Department of Biochemistry and Toxicology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13, 20-950, Lublin, Poland.
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18
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Pilgaard B, Wilkens C, Herbst FA, Vuillemin M, Rhein-Knudsen N, Meyer AS, Lange L. Proteomic enzyme analysis of the marine fungus Paradendryphiella salina reveals alginate lyase as a minimal adaptation strategy for brown algae degradation. Sci Rep 2019; 9:12338. [PMID: 31451726 PMCID: PMC6710412 DOI: 10.1038/s41598-019-48823-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 08/13/2019] [Indexed: 01/31/2023] Open
Abstract
We set out to investigate the genetic adaptations of the marine fungus Paradendryphiella salina CBS112865 for degradation of brown macroalgae. We performed whole genome and transcriptome sequencing and shotgun proteomic analysis of the secretome of P. salina grown on three species of brown algae and under carbon limitation. Genome comparison with closely related terrestrial fungi revealed that P. salina had a similar but reduced CAZyme profile relative to the terrestrial fungi except for the presence of three putative alginate lyases from Polysaccharide Lyase (PL) family 7 and a putative PL8 with similarity to ascomycete chondroitin AC lyases. Phylogenetic and homology analyses place the PL7 sequences amongst mannuronic acid specific PL7 proteins from marine bacteria. Recombinant expression, purification and characterization of one of the PL7 genes confirmed the specificity. Proteomic analysis of the P. salina secretome when growing on brown algae, revealed the PL7 and PL8 enzymes abundantly secreted together with enzymes necessary for degradation of laminarin, cellulose, lipids and peptides. Our findings indicate that the basic CAZyme repertoire of saprobic and plant pathogenic ascomycetes, with the addition of PL7 alginate lyases, provide P. salina with sufficient enzymatic capabilities to degrade several types of brown algae polysaccharides.
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Affiliation(s)
- Bo Pilgaard
- Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark.
| | - Casper Wilkens
- Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Florian-Alexander Herbst
- Center for Microbial Communities, Department of Chemistry and Bioscience Aalborg University, Aalborg, Denmark
| | - Marlene Vuillemin
- Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Nanna Rhein-Knudsen
- Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Anne S Meyer
- Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Lene Lange
- BioEconomy, Research & Advisory, Copenhagen, Denmark
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19
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Liu T, Wang X, Wang G, Jia S, Liu G, Shan G, Chi S, Zhang J, Yu Y, Xue T, Yu J. Evolution of Complex Thallus Alga: Genome Sequencing of Saccharina japonica. Front Genet 2019; 10:378. [PMID: 31118944 PMCID: PMC6507550 DOI: 10.3389/fgene.2019.00378] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 04/09/2019] [Indexed: 01/15/2023] Open
Abstract
Saccharina, as one of the most important brown algae (Phaeophyceae) with multicellular thallus, has a very remarkable evolutionary history, and globally accounts for most of the economic marine aquaculture production worldwide. Here, we present the 580.5 million base pairs of genome sequence of Saccharina japonica, whose current assembly contains 35,725 protein-coding genes. In a comparative analysis with Ectocarpus siliculosus, the integrated virus sequence suggested the genome evolutionary footprints, which derived from their co-ancestry and experienced genomic arrangements. Furthermore, the gene expansion was found to be an important strategy for functional evolution, especially with regard to extracelluar components, stress-related genes, and vanadium-dependent haloperoxidases, and we proposed a hypothesis that gene duplication events were the main driving force for the evolution history from multicellular filamentous algae to thallus algae. The sequenced Saccharina genome paves the way for further molecular studies and is useful for genome-assisted breeding of S. japonica and other related algae species.
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Affiliation(s)
- Tao Liu
- College of Marine Life Science, Ocean University of China, Qingdao, China
- College of Life Sciences, Yantai University, Yantai, China
| | - Xumin Wang
- College of Life Sciences, Yantai University, Yantai, China
| | - Guoliang Wang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Shangang Jia
- College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Guiming Liu
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Guangle Shan
- University of Chinese Academy of Sciences, Beijing, China
| | - Shan Chi
- College of Marine Life Science, Ocean University of China, Qingdao, China
- Qingdao Haida Blue Tek Biotechnology Co., Ltd, Qingdao, China
| | - Jing Zhang
- College of Biological Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Yahui Yu
- College of Marine Life Science, Ocean University of China, Qingdao, China
| | - Ting Xue
- The Public Service Platform for Industrialization Development Technology of Marine Biological Medicine and Product of State Oceanic Administration, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Jun Yu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
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20
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Küpper FC, Carrano CJ. Key aspects of the iodine metabolism in brown algae: a brief critical review. Metallomics 2019; 11:756-764. [PMID: 30834917 DOI: 10.1039/c8mt00327k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Brown algae include the strongest accumulators of iodine known among living systems. This paper reviews the current state of bioinorganic research in the field, focusing on the models Laminaria digitata, Macrocystis pyrifera and Ectocarpus siliculosus, and covering uptake and efflux, localization and biological significance of storage, as well as marine and atmospheric chemistry of iodine.
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Affiliation(s)
- Frithjof C Küpper
- School of Biological Sciences, University of Aberdeen, Cruickshank Building, St. Machar Drive, Aberdeen AB24 3UU, Scotland, UK
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21
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Roleda MY, Skjermo J, Marfaing H, Jónsdóttir R, Rebours C, Gietl A, Stengel DB, Nitschke U. Iodine content in bulk biomass of wild-harvested and cultivated edible seaweeds: Inherent variations determine species-specific daily allowable consumption. Food Chem 2018; 254:333-339. [PMID: 29548461 DOI: 10.1016/j.foodchem.2018.02.024] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/17/2018] [Accepted: 02/06/2018] [Indexed: 11/21/2022]
Abstract
This study represents a large-scale investigation into iodine contents in three commercially important and edible seaweed species from the North Atlantic: the brown algae Saccharina latissima and Alaria esculenta, and the red alga Palmaria palmata. Variability among and within species were explored in terms of temporal and spatial variations in addition to biomass source. Mean iodine concentration in bulk seaweed biomass was species-specific: Saccharina > Alaria > Palmaria. Iodine contents of Saccharina biomass were similar between years and seasons, but varied significantly between sampling locations and biomass sources. In Alaria and Palmaria, none of the independent variables examined contributed significantly to the small variations observed. Our data suggest that all three species are rich sources of iodine, and only 32, 283, or 2149 mg dry weight of unprocessed dry biomass of Saccharina, Alaria, or Palmaria, respectively, meets the recommended daily intake levels for most healthy humans.
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Affiliation(s)
- Michael Y Roleda
- Norwegian Institute of Bioeconomy Research (NIBIO), 8027 Bodø, Norway.
| | | | - Hélène Marfaing
- Centre d'Etude et Valorisation des Algues (CEVA), 22610 Pleubian, France
| | | | - Céline Rebours
- Norwegian Institute of Bioeconomy Research (NIBIO), 8027 Bodø, Norway; Møreforsking Ålesund AS, 6021 Ålesund, Norway
| | - Anna Gietl
- Botany and Plant Science, School of Natural Sciences, and Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
| | - Dagmar B Stengel
- Botany and Plant Science, School of Natural Sciences, and Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
| | - Udo Nitschke
- Botany and Plant Science, School of Natural Sciences, and Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland; Department of Biology, Skidmore College, Saratoga Springs, NY 12866, United States
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22
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Prouty NG, Roark EB, Mohon LM, Chang CC. Uptake and distribution of organo-iodine in deep-sea corals. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 187:122-132. [PMID: 29452767 DOI: 10.1016/j.jenvrad.2018.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 12/18/2017] [Accepted: 01/04/2018] [Indexed: 06/08/2023]
Abstract
Understanding iodine concentration, transport, and bioavailability is essential in evaluating iodine's impact to the environment and its effectiveness as an environmental biogeotracer. While iodine and its radionuclides have proven to be important tracers in geologic and biologic studies, little is known about transport of this element to the deep sea and subsequent uptake in deep-sea coral habitats. Results presented here on deep-sea black coral iodine speciation and iodine isotope variability provides key information on iodine behavior in natural and anthropogenic environments, and its geochemical pathway in the Gulf of Mexico. Organo-iodine is the dominant iodine species in the black corals, demonstrating that binding of iodine to organic matter plays an important role in the transport and transfer of iodine to the deep-sea corals. The identification of growth bands captured in high-resolution scanning electron images (SEM) with synchronous peaks in iodine variability suggest that riverine delivery of terrestrial-derived organo-iodine is the most plausible explanation to account for annual periodicity in the deep-sea coral geochemistry. Whereas previous studies have suggested the presence of annual growth rings in deep-sea corals, this present study provides a mechanism to explain the formation of annual growth bands. Furthermore, deep-sea coral ages based on iodine peak counts agree well with those ages derived from radiocarbon (14C) measurements. These results hold promise for developing chronologies independent of 14C dating, which is an essential component in constraining reservoir ages and using radiocarbon as a tracer of ocean circulation. Furthermore, the presence of enriched 129I/127I ratios during the most recent period of skeleton growth is linked to nuclear weapons testing during the 1960s. The sensitivity of the coral skeleton to record changes in surface water 129I composition provides further evidence that iodine composition and isotope variability captured in proteinaceous deep-sea corals is a promising geochronometer as well as an emerging tracer for continental material flux.
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Affiliation(s)
- Nancy G Prouty
- US Geological Survey, 2885 Mission St., Santa Cruz, CA 95060, United States.
| | - E Brendan Roark
- Department of Geography, Texas A&M University, College Station, TX 77843, United States
| | - Leslye M Mohon
- Department of Geography, Texas A&M University, College Station, TX 77843, United States
| | - Ching-Chih Chang
- University of Arizona, Department of Geosciences, Tuscon, AZ 85721, United States
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23
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Herget K, Frerichs H, Pfitzner F, Tahir MN, Tremel W. Functional Enzyme Mimics for Oxidative Halogenation Reactions that Combat Biofilm Formation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1707073. [PMID: 29920781 DOI: 10.1002/adma.201707073] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/18/2018] [Indexed: 06/08/2023]
Abstract
Transition-metal oxide nanoparticles and molecular coordination compounds are highlighted as functional mimics of halogenating enzymes. These enzymes are involved in halometabolite biosynthesis. Their activity is based upon the formation of hypohalous acids from halides and hydrogen peroxide or oxygen, which form bioactive secondary metabolites of microbial origin with strong antibacterial and antifungal activities in follow-up reactions. Therefore, enzyme mimics and halogenating enzymes may be valuable tools to combat biofilm formation. Here, halogenating enzyme models are briefly described, enzyme mimics are classified according to their catalytic functions, and current knowledge about the settlement chemistry and adhesion of fouling organisms is summarized. Enzyme mimics with the highest potential are showcased. They may find application in antifouling coatings, indoor and outdoor paints, polymer membranes for water desalination, or in aquacultures, but also on surfaces for food packaging, door handles, hand rails, push buttons, keyboards, and other elements made of plastic where biofilms are present. The use of natural compounds, formed in situ with nontoxic and abundant metal oxide enzyme mimics, represents a novel and efficient "green" strategy to emulate and utilize a natural defense system for preventing bacterial colonization and biofilm growth.
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Affiliation(s)
- Karoline Herget
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Hajo Frerichs
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Felix Pfitzner
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Muhammad Nawaz Tahir
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128, Mainz, Germany
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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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25
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Wever R, Krenn BE, Renirie R. Marine Vanadium-Dependent Haloperoxidases, Their Isolation, Characterization, and Application. Methods Enzymol 2018; 605:141-201. [PMID: 29909824 DOI: 10.1016/bs.mie.2018.02.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Vanadium-dependent haloperoxidases in seaweeds, cyanobacteria, fungi, and possibly phytoplankton play an important role in the release of halogenated volatile compounds in the environment. These halocarbons have effects on atmospheric chemistry since they cause ozone depletion. In this chapter, a survey is given of the different sources of these enzymes, some of their properties, the various methods to isolate them, and the bottlenecks in purification. The assays to detect and quantify haloperoxidase activity are described as well as their kinetic properties. Several practical tips and pitfalls are given which have not yet been published explicitly. Recent developments in research on structure and function of these enzymes are reviewed. Finally, the application of vanadium-dependent haloperoxidases in the biosynthesis of brominated and other compounds is discussed.
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Affiliation(s)
- Ron Wever
- University of Amsterdam, Van't Hoff Institute for Molecular Sciences, Amsterdam, The Netherlands.
| | - Bea E Krenn
- University of Amsterdam, Innovation Exchange Amsterdam, Amsterdam, The Netherlands
| | - Rokus Renirie
- University of Amsterdam, Van't Hoff Institute for Molecular Sciences, Amsterdam, The Netherlands
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26
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Adhikari H, Mukherjea KK. Mononuclear oxidodiperoxido vanadium(V) complex: synthesis, structure, VHPO mimicking oxidative bromination, and potential detection of hydrogen peroxide. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1439936] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nitschke U, Walsh P, McDaid J, Stengel DB. Variability in iodine in temperate seaweeds and iodine accumulation kinetics of Fucus vesiculosus and Laminaria digitata (Phaeophyceae, Ochrophyta). JOURNAL OF PHYCOLOGY 2018; 54:114-125. [PMID: 29130494 DOI: 10.1111/jpy.12606] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 11/05/2017] [Indexed: 06/07/2023]
Abstract
The biogeochemistry of iodine in temperate coastal ecosystems is largely mediated by macroalgae, which act as a major biological sink and source of iodine. Their capacity to accumulate, retain and release iodine has been associated with abiotic and biotic stressors, but quantitative information is limited. We evaluated the seasonal iodine retention capacity of eleven macroalgal species belonging to different systematic groups, collected from two sites in Ireland. Iodine accumulation and retention were then further quantified in Fucus vesiculosus and Laminaria digitata in relation to I- concentrations in seawater and temperature. In general, iodine contents were ~101 -102 μmol · (g dw)-1 for Laminariales, 100 -101 μmol · (g dw)-1 for Fucales, 10-1 -100 μmol · (g dw)-1 for Rhodophyta, and 10-1 μmol · (g dw)-1 for Chlorophyta. Typically, algal iodine contents were above average in winter and below average in summer. Iodine accumulation in F. vesiculosus and L. digitata depended on I- availability and followed the Michaelis-Menten kinetic. The ratio of maximum accumulation rate to half accumulation coefficient (ρmax : Kt ) was 2.4 times higher for F. vesiculosus than for L. digitata, suggesting that F. vesiculosus was more efficient in iodine accumulation. Both species exhibited a temperature-dependent net loss of iodine, and only an exposure to sufficient external I- concentrations compensated for this loss. This study revealed that both environmental (e.g., I- in seawater, temperature) and organismal (e.g., the status of the iodine storage pool) variables determine retention and variability in iodine in temperate seaweeds.
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Affiliation(s)
- Udo Nitschke
- Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
| | - Philip Walsh
- Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
| | - Jade McDaid
- Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
| | - Dagmar B Stengel
- Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
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28
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Tymon TM, Miller EP, Gonzales JL, Raab A, Küpper FC, Carrano CJ. Some aspects of the iodine metabolism of the giant kelp Macrocystis pyrifera (phaeophyceae). J Inorg Biochem 2017; 177:82-88. [PMID: 28926758 DOI: 10.1016/j.jinorgbio.2017.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/04/2017] [Accepted: 09/06/2017] [Indexed: 11/16/2022]
Abstract
Despite its paramount role in the functioning of coastal ecosystems, relatively little is known about halogen metabolism in giant kelp (Macrocystis pyrifera). This is an important shortcoming given the potential implications for marine and atmospheric chemical processes in the wide distribution range of Macrocystis. The work presented here constitutes the first in depth investigation of the uptake, efflux, and of the physiological function of iodide in this important kelp species. Iodide uptake and efflux rates were measured in adult sporophytes of Macrocystis under normal and stressed (exogenous hydrogen peroxide and an elicitor-triggered oxidative burst) conditions. Kelp tissue took up iodide according to Michaelis-Menten type kinetics when incubated in seawater enriched with various concentrations of iodide. Upon the addition of exogenous hydrogen peroxide, simulating oxidative stress, a marked efflux of iodide occurred. In situ generation of hydrogen peroxide was elicited in Macrocystis upon the addition of oligomeric degradation products of alginate as well as arachidonic acid and methyl jasmonate constituting a defensive oxidative burst that could be linked to iodine accumulation. H2O2 was detected at the single cell level using dichlorohydrofluorescein diacetate, a fluorogenic probe capable of detecting intracellular H2O2. When assayed for vanadium haloperoxidase activity, several bromoperoxidase isoforms were detected as well as a single iodoperoxidase. Altogether, the results of this study show that Macrocystis has an elaborate iodine metabolism, which is likely significant for impacting iodine speciation in seawater around kelp beds and for volatile halogen emissions into the coastal atmosphere.
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Affiliation(s)
- Teresa M Tymon
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA 92182-1030, USA
| | - Eric P Miller
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA 92182-1030, USA
| | - Jennifer L Gonzales
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA 92182-1030, USA
| | - Andrea Raab
- Department of Chemistry, University of Aberdeen, Aberdeen AB24 3FX, UK
| | | | - Carl J Carrano
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA 92182-1030, USA.
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29
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Pagnacco MC, Mojović MD, Popović-Bijelić AD, Horváth AK. Investigation of the Halogenate-Hydrogen Peroxide Reactions Using the Electron Paramagnetic Resonance Spin Trapping Technique. J Phys Chem A 2017; 121:3207-3212. [PMID: 28402644 DOI: 10.1021/acs.jpca.7b02035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The differences in the mechanism of the halogenate reactions with the same oxidizing/reducing agent, such as H2O2 contribute to the better understanding of versatile halogen chemistry. The reaction between iodate, bromate, and chlorate with hydrogen peroxide in acidic medium at 60 °C is investigated by using the electron paramagnetic resonance (EPR) spin trapping technique. Essential differences in the chemistry of iodate, bromate, and chlorate in their reactions with hydrogen peroxide have been evidenced by finding different radicals as governing intermediates. The reaction between KIO3 and H2O2 is supposed to be the source of IO2• radicals. The KBrO3 and H2O2 reaction did not produce any EPR signal, whereas the KClO3-H2O2 system was found to be a source of HO• radical. Moreover, KClO3 dissolved in sulfuric acid without hydrogen peroxide produced HO• radical as well. The minimal-core models explaining the origin of obtained EPR signals are proposed. Current findings suggested the inclusion of IO2• and HOO• radicals, and ClO2• and HO• radicals in the particular kinetic models of iodate-hydrogen peroxide and chlorate-hydrogen peroxide systems, as well as possible exclusion of BrO2• radical from the kinetic scheme of the bromate-hydrogen peroxide system. Obtained results may pave the way for understanding more complex, nonlinear reactions of these halogen-containing species.
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Affiliation(s)
- Maja C Pagnacco
- Faculty of Physical Chemistry, University of Belgrade , Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
| | - Miloš D Mojović
- Faculty of Physical Chemistry, University of Belgrade , Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
| | - Ana D Popović-Bijelić
- Faculty of Physical Chemistry, University of Belgrade , Studentski trg 12-16, P.O. Box 47, 11158 Belgrade, Serbia
| | - Attila K Horváth
- Department of Inorganic Chemistry, University of Pécs , Ifjúság u. 6, H-7624 Pécs, Hungary
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Lavoie S, Brumley D, Alexander TS, Jasmin C, Carranza FA, Nelson K, Quave CL, Kubanek J. Iodinated Meroditerpenes from a Red Alga Callophycus sp. J Org Chem 2017; 82:4160-4169. [PMID: 28378583 PMCID: PMC5538829 DOI: 10.1021/acs.joc.7b00096] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Unique iodine-containing meroditerpenes iodocallophycoic acid A (1) and iodocallophycols A-D (2-5) were discovered from the Fijian red alga Callophycus sp. Because flexibility of the molecular skeleton impaired full characterization of relative stereochemistries by NMR spectroscopy, a DFT-based theoretical model was developed to derive relevant interproton distances which were compared to those calculated from NOE measurements, yielding the relative stereochemistries. The correct 2S,6S,7S,10S,14S enantiomers were then identified by comparison of theoretical and experimental ECD spectra. Biological activities of these iodinated and brominated meroditerpenes and additional new, related bromophycoic acid F (6) and bromophycoic acid A methyl ester (7), were evaluated for relevant human disease targets. Iodocallophycoic acid A (1) showed moderate antibiotic activity against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium (VREF) with MIC values of 1.4 and 2.2 μg mL-1, respectively. It also potentiated the anti-MRSA activity of oxacillin in a synergistic fashion, resulting in an 8-fold increase in oxacillin potency, for a MIC of 16 μg mL-1.
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Affiliation(s)
- Serge Lavoie
- School of Chemistry and Biochemistry, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School of Biological Sciences, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - David Brumley
- School of Chemistry and Biochemistry, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Troy S. Alexander
- School of Chemistry and Biochemistry, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Christine Jasmin
- School of Chemistry and Biochemistry, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School of Biological Sciences, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Franz A. Carranza
- School of Biological Sciences, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Kate Nelson
- Department of Dermatology, Emory University, Atlanta, Georgia 30322, United States
| | - Cassandra L. Quave
- Department of Dermatology, Emory University, Atlanta, Georgia 30322, United States
- Center for the Study of Human Health, Emory University, Atlanta, Georgia 30322, United States
- Antibiotic Resistance Center, Emory University, Atlanta, Georgia 30322, United States
| | - Julia Kubanek
- School of Chemistry and Biochemistry, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School of Biological Sciences, Aquatic Chemical Ecology Center, Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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31
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Mangal V, Zhu Y, Shi YX, Guéguen C. Assessing cadmium and vanadium accumulation using diffusive gradient in thin-films (DGT) and phytoplankton in the Churchill River estuary, Manitoba. CHEMOSPHERE 2016; 163:90-98. [PMID: 27521643 DOI: 10.1016/j.chemosphere.2016.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 07/15/2016] [Accepted: 08/01/2016] [Indexed: 06/06/2023]
Abstract
Diffusive gradient in thin films (DGT) and phytoplankton communities were evaluated for the measurement of Cd and V at environmentally relevant concentrations in laboratory settings and in the Churchill River estuary (Manitoba, Canada) during an annual spring melt. Despite rapid changes in hydrology and water quality, DGT samplers and intracellular Cd and V concentrations were positively correlated (0.79 < r(2) < 0.99), suggesting comparable accumulation trends between both DGT-labile and intracellular monitoring techniques. The largest accumulated concentrations of both Cd and V by DGT and phytoplankton accumulation methods were found later into the river discharge period. In controlled settings, accumulated Cd and V concentrations by the diatom Attheya septentrionalis displayed a strong correlation with metals accumulated by DGTs (r(2) > 0.99). Principal component analysis (PCA) reinforced similarities between both metal monitoring techniques and assessed how changing environmental variables during the river discharge period influenced each monitoring technique. Cd accumulation was influenced by DOC concentrations and protein-like DOM whereas ionic strength (i.e. conductivity) and humic-like DOM influenced V accumulation. The present findings suggest that (1) DGT is a versatile tool for monitoring bioaccumulation of Cd and V in highly dynamic environmental systems and (2) DOC concentration, DOM composition, conductivity, pH, and river discharge influence the bioavailability of Cd and V in estuarine and riverine waters.
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Affiliation(s)
- V Mangal
- Environmental and Life Sciences Graduate Program, Trent University, ON, Canada
| | - Y Zhu
- Environmental and Life Sciences Graduate Program, Trent University, ON, Canada
| | - Y X Shi
- Environmental and Life Sciences Graduate Program, Trent University, ON, Canada
| | - C Guéguen
- Chemistry Department, Trent University, ON, Canada.
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32
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Duan L, Xiu G, Feng L, Cheng N, Wang C. The mercury species and their association with carbonaceous compositions, bromine and iodine in PM2.5 in Shanghai. CHEMOSPHERE 2016; 146:263-271. [PMID: 26735726 DOI: 10.1016/j.chemosphere.2015.11.058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 10/28/2015] [Accepted: 11/15/2015] [Indexed: 06/05/2023]
Abstract
PM2.5 samples were collected in south Shanghai from November 2013 to October 2014. The species of particulate bounded mercury (PBM), including hydrochloric soluble particle-phase mercury (HPM), element soluble particle-phase mercury (EPM) and residual soluble particle-phase mercury (RPM), were determined in PM2.5. The chemical composition of PM2.5 including organic carbon (OC) and elemental carbon (EC), total bromine and iodine were also analyzed. The results showed that the annual average concentration of PBM was 0.30 ± 0.31 ng m(-3) and 0.34 ± 0.32 ng m(-3) in winter, 0.31 ± 0.19 ng m(-3) in spring, 0.30 ± 0.45 ng m(-3) in fall and 0.28 ± 0.17 ng m(-3) in summer. HPM took the highest fraction 51.2% in PBM, followed by RPM 27.7% and EPM 21.1%. EC positively correlated to particle mercury, especially in winter (r = 0.70), the same for OC in winter (r = 0.72), which indicated that the carbonaceous composition may affect the transformation of Hg in the atmosphere. Mercury species showed different correlations with bromine and iodine in the four seasons. The strongest correlation between bromine, iodine and mercury was found in spring and fall, respectively. Bromine showed the stronger correlation with total mercury and speciated particle mercury than iodine. In addition, the days were classified into haze and non-haze days based on the visibility and relative humidity, while the ratio of HPM in haze days was much higher than that in non-haze days. EC strongly correlated with PBM during haze and non-haze days while OC only positively correlated with PBM in non-haze days, this may indicate that the different carbonaceous part may affect PBM differently.
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Affiliation(s)
- Lian Duan
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes, East China University of Science and Technology, Shanghai 200237, PR China
| | - Guangli Xiu
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes, East China University of Science and Technology, Shanghai 200237, PR China.
| | - Ling Feng
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes, East China University of Science and Technology, Shanghai 200237, PR China
| | - Na Cheng
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes, East China University of Science and Technology, Shanghai 200237, PR China
| | - Chenggang Wang
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes, East China University of Science and Technology, Shanghai 200237, PR China
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Medrano-Macías J, Leija-Martínez P, González-Morales S, Juárez-Maldonado A, Benavides-Mendoza A. Use of Iodine to Biofortify and Promote Growth and Stress Tolerance in Crops. FRONTIERS IN PLANT SCIENCE 2016; 7:1146. [PMID: 27602033 PMCID: PMC4993787 DOI: 10.3389/fpls.2016.01146] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/18/2016] [Indexed: 05/06/2023]
Abstract
Iodine is not considered essential for land plants; however, in some aquatic plants, iodine plays a critical role in antioxidant metabolism. In humans, iodine is essential for the metabolism of the thyroid and for the development of cognitive abilities, and it is associated with lower risks of developing certain types of cancer. Therefore, great efforts are made to ensure the proper intake of iodine to the population, for example, the iodization of table salt. In the same way, as an alternative, the use of different iodine fertilization techniques to biofortify crops is considered an adequate iodine supply method. Hence, biofortification with iodine is an active area of research, with highly relevant results. The agricultural application of iodine to enhance growth, environmental adaptation, and stress tolerance in plants has not been well explored, although it may lead to the increased use of this element in agricultural practice and thus contribute to the biofortification of crops. This review systematically presents the results published on the application of iodine in agriculture, considering different environmental conditions and farming systems in various species and varying concentrations of the element, its chemical forms, and its application method. Some studies report beneficial effects of iodine, including better growth, and changes in the tolerance to stress and antioxidant capacity, while other studies report that the applications of iodine cause no response or even have adverse effects. We suggested different assumptions that attempt to explain these conflicting results, considering the possible interaction of iodine with other trace elements, as well as the different physicochemical and biogeochemical conditions that give rise to the distinct availability and the volatilization of the element.
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Affiliation(s)
- Julia Medrano-Macías
- Departamento de Botánica, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo LeónSan Nicolás de los Garza, Mexico
| | - Paola Leija-Martínez
- Laboratorio de Fisiología, Departamento de Horticultura, Universidad Autónoma Agraria Antonio NarroSaltillo, Mexico
| | - Susana González-Morales
- Consejo Nacional de Ciencia y Tecnología, Departamento de Horticultura, Universidad Autónoma Agraria Antonio NarroSaltillo, Mexico
| | | | - Adalberto Benavides-Mendoza
- Laboratorio de Fisiología, Departamento de Horticultura, Universidad Autónoma Agraria Antonio NarroSaltillo, Mexico
- *Correspondence: Adalberto Benavides-Mendoza
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34
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Badetti E, Romano F, Marchiò L, Taşkesenlioğlu S, Daştan A, Zonta C, Licini G. Effective bromo and chloro peroxidation catalysed by tungsten(vi) amino triphenolate complexes. Dalton Trans 2016; 45:14603-8. [DOI: 10.1039/c6dt01780k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amino triphenolate tungsten(vi) complexes have been prepared and they proved to be efficient catalysts in haloperoxidation reactions using hydrogen peroxide as a terminal oxidant and inorganic sources of halides.
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Affiliation(s)
- Elena Badetti
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
| | - Francesco Romano
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
| | - Luciano Marchiò
- Dipartimento di Chimica
- Università degli Studi di Parma
- 43123 Parma
- Italy
| | - Sara Taşkesenlioğlu
- Ağrı İbrahim Çeçen University
- Faculty of Arts and Science
- Department of Chemistry
- Agri
- Turkey
| | - Arif Daştan
- Faculty of Science
- Department of Chemistry
- Ataturk University
- Erzurum
- Turkey
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
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35
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Leblanc C, Vilter H, Fournier JB, Delage L, Potin P, Rebuffet E, Michel G, Solari P, Feiters M, Czjzek M. Vanadium haloperoxidases: From the discovery 30 years ago to X-ray crystallographic and V K-edge absorption spectroscopic studies. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.013] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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36
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Ye N, Zhang X, Miao M, Fan X, Zheng Y, Xu D, Wang J, Zhou L, Wang D, Gao Y, Wang Y, Shi W, Ji P, Li D, Guan Z, Shao C, Zhuang Z, Gao Z, Qi J, Zhao F. Saccharina genomes provide novel insight into kelp biology. Nat Commun 2015; 6:6986. [PMID: 25908475 PMCID: PMC4421812 DOI: 10.1038/ncomms7986] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 03/20/2015] [Indexed: 01/28/2023] Open
Abstract
Seaweeds are essential for marine ecosystems and have immense economic value. Here we present a comprehensive analysis of the draft genome of Saccharina japonica, one of the most economically important seaweeds. The 537-Mb assembled genomic sequence covered 98.5% of the estimated genome, and 18,733 protein-coding genes are predicted and annotated. Gene families related to cell wall synthesis, halogen concentration, development and defence systems were expanded. Functional diversification of the mannuronan C-5-epimerase and haloperoxidase gene families provides insight into the evolutionary adaptation of polysaccharide biosynthesis and iodine antioxidation. Additional sequencing of seven cultivars and nine wild individuals reveal that the genetic diversity within wild populations is greater than among cultivars. All of the cultivars are descendants of a wild S. japonica accession showing limited admixture with S. longissima. This study represents an important advance toward improving yields and economic traits in Saccharina and provides an invaluable resource for plant genome studies.
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Affiliation(s)
- Naihao Ye
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Xiaowen Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Miao Miao
- 1] Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China [2] College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao Fan
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Yi Zheng
- 1] Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China [2] College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Xu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Jinfeng Wang
- Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China
| | - Lin Zhou
- 1] Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China [2] College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dongsheng Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Yuan Gao
- 1] Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China [2] College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yitao Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Wenyu Shi
- 1] Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China [2] College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peifeng Ji
- 1] Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China [2] College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Demao Li
- Tianjin Key Laboratory for Industrial Biosystems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Zheng Guan
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Changwei Shao
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Zhimeng Zhuang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Zhengquan Gao
- School of Life Sciences, Shandong University of Technology, Zibo 255049, China
| | - Ji Qi
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Fangqing Zhao
- Computational Genomics Lab, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China
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Milenkovic MC, Potkonjak NI. The Effect of Hydroxycinnamic Acids on Oxy-Radical Generating Iodide–Hydrogen Peroxide Reaction. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140175] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | - Nebojša I. Potkonjak
- Chemical Dynamics Laboratory, Vinca Institute of Nuclear Sciences, University of Belgrade
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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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Superoxide production by a manganese-oxidizing bacterium facilitates iodide oxidation. Appl Environ Microbiol 2014; 80:2693-9. [PMID: 24561582 DOI: 10.1128/aem.00400-14] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The release of radioactive iodine (i.e., iodine-129 and iodine-131) from nuclear reprocessing facilities is a potential threat to human health. The fate and transport of iodine are determined primarily by its redox status, but processes that affect iodine oxidation states in the environment are poorly characterized. Given the difficulty in removing electrons from iodide (I(-)), naturally occurring iodide oxidation processes require strong oxidants, such as Mn oxides or microbial enzymes. In this study, we examine iodide oxidation by a marine bacterium, Roseobacter sp. AzwK-3b, which promotes Mn(II) oxidation by catalyzing the production of extracellular superoxide (O2(-)). In the absence of Mn(2+), Roseobacter sp. AzwK-3b cultures oxidized ∼90% of the provided iodide (10 μM) within 6 days, whereas in the presence of Mn(II), iodide oxidation occurred only after Mn(IV) formation ceased. Iodide oxidation was not observed during incubations in spent medium or with whole cells under anaerobic conditions or following heat treatment (boiling). Furthermore, iodide oxidation was significantly inhibited in the presence of superoxide dismutase and diphenylene iodonium (a general inhibitor of NADH oxidoreductases). In contrast, the addition of exogenous NADH enhanced iodide oxidation. Taken together, the results indicate that iodide oxidation was mediated primarily by extracellular superoxide generated by Roseobacter sp. AzwK-3b and not by the Mn oxides formed by this organism. Considering that extracellular superoxide formation is a widespread phenomenon among marine and terrestrial bacteria, this could represent an important pathway for iodide oxidation in some environments.
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Nitschke U, Stengel DB. Iodine contributes to osmotic acclimatisation in the kelp Laminaria digitata (Phaeophyceae). PLANTA 2014; 239:521-30. [PMID: 24253307 DOI: 10.1007/s00425-013-1992-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/28/2013] [Indexed: 06/02/2023]
Abstract
Iodide (I⁻) retained by the brown macroalga Laminaria digitata at millimolar levels, possesses antioxidant activities, but the wider physiological significance of its accumulation remains poorly understood. In its natural habitat in the lower intertidal, L. digitata experiences salinity changes and osmotic homeostasis is achieved by regulating the organic osmolyte mannitol. However, I⁻ may also holds an osmotic function. Here, impacts of hypo- and hypersaline conditions on I⁻ release from, and accumulation by, L. digitata were assessed. Additionally, mannitol accumulation was determined at high salinities, and physiological responses to externally elevated iodine concentrations and salinities were characterised by chl a fluorometry. Net I⁻ release rates increased with decreasing salinity. I⁻ was accumulated at normal (35 S A) and high salinities (50 S A); this coincided with enhanced rETRmax and qP causing pronounced photoprotection capabilities via NPQ. At 50 S A elevated tissue iodine levels impeded the well-established response of mannitol accumulation and prevented photoinhibition. Contrarily, low tissue iodine levels limited photoprotection capabilities and resulted in photoinhibition at 50 S A, even though mannitol was accumulated. The results indicate a, so far, undescribed osmotic function of I⁻ in L. digitata and, thus, multifunctional principles of this halogen in kelps. The osmotic function of mannitol may have been substituted by that of I⁻ under hypersaline conditions, suggesting a complementary role of inorganic and organic solutes under salinity stress. This study also provides first evidence that iodine accumulation in L. digitata positively affects photo-physiology.
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Affiliation(s)
- Udo Nitschke
- Botany and Plant Science, School of Natural Sciences, and Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland,
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41
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Nitschke U, Dixneuf S, Ruth AA, Schmid M, Stengel DB. Molecular iodine (I2) emission from two Laminaria species (Phaeophyceae) and impact of irradiance and temperature on I2 emission into air and iodide release into seawater from Laminaria digitata. MARINE ENVIRONMENTAL RESEARCH 2013; 92:102-9. [PMID: 24080409 DOI: 10.1016/j.marenvres.2013.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 08/29/2013] [Accepted: 09/09/2013] [Indexed: 05/22/2023]
Abstract
Kelps of the genus Laminaria accumulate iodine at high concentrations, but the iodine retaining capacity can be affected by emersion and physiological stress. In this study, I2 emission into the atmosphere from Laminaria digitata and Laminaria hyperborea was compared under controlled low irradiances and temperatures. The two species exhibited different I2 emission rates as blades of L. digitata emitted I2 at rates five times higher than those from newly-grown blades (current growth season) of L. hyperborea. I2 emission was not detectable from old blades (previous growth season) of L. hyperborea. Additionally, effects of irradiance and temperature on both I2 emission into air and net I(-) release into seawater where assessed for L. digitata while monitoring photo-physiological parameters as stress indicators. Irradiances between 30 and 120 μmol photons m(-2) s(-1) had only marginal effects on both I2 emission and I(-) release rates, but physiological stress, indicated by photoinhibition, was observed. The results suggest that the irradiances applied here were not stressful enough to impact on the iodine release. By contrast, at elevated temperatures (20 °C), photoinhibition was accompanied by an increase in I2 emission rates, but net I(-) release rates remained similar at 10-20 °C. High I2 emission rates into air and I(-) release into seawater observed from L. digitata underpin the fundamental function of this kelp as mediator of coastal iodine fluxes.
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Affiliation(s)
- Udo Nitschke
- Botany and Plant Science, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland; Ryan Institute for Marine, Environmental and Energy Research, National University of Ireland Galway, Galway, Ireland.
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Jabbar T, Wallner G, Steier P. A review on 129I analysis in air. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2013; 126:45-54. [PMID: 23954281 DOI: 10.1016/j.jenvrad.2013.07.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 07/18/2013] [Accepted: 07/19/2013] [Indexed: 06/02/2023]
Abstract
A review of literature focused on (129)I determination in air is provided. (129)I analysis in the environment represents a vital tool for tracing transport mechanisms, distribution pathways, safety assessment and its application as environmental tracer. To achieve that, specific chemical extraction methods and high sensitivity analytical techniques have been developed. This paper is intended to give an overview about the sample collection, extraction and distribution of (129)I in the air. Sensitivity of available measurement techniques for the determination of (129)I is compared. The article also provides the summary of current worldwide distribution of (129)I in air and respective radiation exposure of man.
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Affiliation(s)
- Tania Jabbar
- Department of Inorganic Chemistry, University of Vienna, Währingerstr. 42, A-1090 Vienna, Austria.
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43
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van Bergeijk SA, Hernández Javier L, Heyland A, Manchado M, Pedro Cañavate J. Uptake of iodide in the marine haptophyte Isochrysis sp. (T.ISO) driven by iodide oxidation. JOURNAL OF PHYCOLOGY 2013; 49:640-647. [PMID: 27007197 DOI: 10.1111/jpy.12073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 03/19/2013] [Indexed: 06/05/2023]
Abstract
Uptake of iodide was studied in the marine microalga Isochrysis sp. (isol. Haines, T.ISO) during short-term incubations with radioactive iodide ((125) I(-) ). Typical inhibitors of the sodium/iodide symporter (NIS) did not inhibit iodide uptake, suggesting that iodide is not taken up through this transport protein, as is the case in most vertebrate animals. Oxidation of iodide was found to be an essential step for its uptake by T.ISO and it seemed likely that hypoiodous acid (HOI) was the form of iodine taken up. Uptake of iodide was inhibited by the addition of thiourea and of other reducing agents, like L-ascorbic acid, L-glutathione and L-cysteine and increased after the addition of oxidized forms of the transition metals Fe and Mn. The simultaneous addition of both hydrogen peroxide (H2 O2 ) and a known iodide-oxidizing myeloperoxidase (MPO) significantly increased iodine uptake, but the addition of H2 O2 or MPO separately, had no effect on uptake. This confirms the observation that iodide is oxidized prior to uptake, but it puts into doubt the involvement of H2 O2 excretion and membrane-bound or extracellular haloperoxidase activity of T.ISO. The increase of iodide uptake by T.ISO upon Fe(III) addition suggests the nonenzymatic oxidation of iodide by Fe(III) in a redox reaction and subsequent influx of HOI. This is the first report on the mechanism of iodide uptake in a marine microalga.
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Affiliation(s)
- Stef A van Bergeijk
- IFAPA Centro El Toruño, Junta de Andalucía, Camino Tiro del Pichón s/n, El Puerto de Santa María, 11500, Spain
| | - Laura Hernández Javier
- IFAPA Centro El Toruño, Junta de Andalucía, Camino Tiro del Pichón s/n, El Puerto de Santa María, 11500, Spain
| | - Andreas Heyland
- Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada, N1G 2W1
| | - Manuel Manchado
- IFAPA Centro El Toruño, Junta de Andalucía, Camino Tiro del Pichón s/n, El Puerto de Santa María, 11500, Spain
| | - José Pedro Cañavate
- IFAPA Centro El Toruño, Junta de Andalucía, Camino Tiro del Pichón s/n, El Puerto de Santa María, 11500, Spain
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44
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Wischang D, Radlow M, Schulz H, Vilter H, Viehweger L, Altmeyer MO, Kegler C, Herrmann J, Müller R, Gaillard F, Delage L, Leblanc C, Hartung J. Molecular cloning, structure, and reactivity of the second bromoperoxidase from Ascophyllum nodosum. Bioorg Chem 2012; 44:25-34. [PMID: 22884431 DOI: 10.1016/j.bioorg.2012.05.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 04/30/2012] [Accepted: 05/21/2012] [Indexed: 11/16/2022]
Abstract
The sequence of bromoperoxidase II from the brown alga Ascophyllum nodosum was determined from a full length cloned cDNA, obtained from a tandem mass spectrometry RT-PCR-approach. The clone encodes a protein composed of 641 amino-acids, which provides a mature 67.4 kDa-bromoperoxidase II-protein (620 amino-acids). Based on 43% sequence homology with the previously characterized bromoperoxidase I from A. nodosum, a tertiary structure was modeled for the bromoperoxidase II. The structural model was refined on the basis of results from gel filtration and vanadate-binding studies, showing that the bromoperoxidase II is a hexameric metalloprotein, which binds 0.5 equivalents of vanadate as cofactor per 67.4 kDa-subunit, for catalyzing oxidation of bromide by hydrogen peroxide in a bi-bi-ping-pong mechanism (k(cat) = 153 s(-1), 22 °C, pH 5.9). Bromide thereby is converted into a bromoelectrophile of reactivity similar to molecular bromine, based on competition kinetic data on phenol bromination and correlation analysis. Reactivity provided by the bromoperoxidase II mimics biosynthesis of methyl 4-bromopyrrole-2-carboxylate, a natural product isolated from the marine sponge Axinella tenuidigitata.
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Affiliation(s)
- Diana Wischang
- Fachbereich Chemie, Organische Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Strasse, D-67663 Kaiserslautern, Germany
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45
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Salaün S, La Barre S, Dos Santos-Goncalvez M, Potin P, Haras D, Bazire A. Influence of exudates of the kelp Laminaria digitata on biofilm formation of associated and exogenous bacterial epiphytes. MICROBIAL ECOLOGY 2012; 64:359-69. [PMID: 22476759 DOI: 10.1007/s00248-012-0048-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 03/17/2012] [Indexed: 05/31/2023]
Abstract
Wild populations of brown marine algae (Phaeophyta) provide extensive surfaces to bacteria and epiphytic eukaryotes for colonization. On one hand, various strategies allow kelps prevent frond surface fouling which would retard growth by reducing photosynthesis and increasing pathogenesis. On the other hand, production and release of organic exudates of high energy value, sometimes in association with more or less selective control of settlement of epiphytic strains, allow bacteria to establish surface consortia not leading to macrofouling. Here, we present the analysis of adhesion and biofilm formation of bacterial isolates from the kelp Laminaria digitata and of characterized and referenced marine isolates. When they were grown in flow cell under standard nutrient regimes, all used bacteria, except one, were able to adhere on glass and then develop as biofilms, with different architecture. Then, we evaluated the effect of extracts from undisturbed young Laminaria thalli and from young thalli subjected to oxidative stress elicitation; this latter condition induced the production of defense molecules. We observed increasing or decreasing adhesion depending on the referenced strains, but no effects were observed against strains isolated from L. digitata. Such effects were less observed on biofilms. Our results suggested that L. digitata is able to modulate its bacterial colonization. Finally, mannitol, a regular surface active component of Laminaria exudates was tested individually, and it showed a pronounced increased on one biofilm strain. Results of these experiments are original and can be usefully linked to what we already know on the oxidative halogen metabolism peculiar to Laminaria. Hopefully, we will be able to understand more about the unique relationship that bacteria have been sharing with Laminaria for an estimated one billion years.
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Affiliation(s)
- Stéphanie Salaün
- Laboratoire de Biotechnologie et de Chimie Marines, Université de Bretagne-Sud, EA3884, BP 92116, 56321, Lorient, France
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Bengtson P, Bastviken D, Oberg G. Possible roles of reactive chlorine II: assessing biotic chlorination as a way for organisms to handle oxygen stress. Environ Microbiol 2012; 15:991-1000. [PMID: 22712445 DOI: 10.1111/j.1462-2920.2012.02807.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Natural formation of organically bound chlorine is extensive in many environments. The enzymes associated with the formation of chlorinated organic matter are produced by a large variety of organisms. Little is known about the ecological role of the process, the key question being: why do microorganisms promote chlorination of organic matter? In a recent paper we discuss whether organic matter chlorination may be a result of antagonistic interactions among microorganisms. In the present paper we evaluate whether extracellular microbial formation of reactive chlorine may be used as a defence against oxygen stress, and we discuss whether this process is likely to contribute to the formation of chlorinated organic matter. Our analysis suggests that periodic exposure to elevated concentrations of reactive oxygen species is a common denominator among the multitude of organisms that are able to enzymatically catalyse formation of reactive chlorine. There is also some evidence suggesting that the production of such enzymes in algae and bacteria is induced by oxygen stress. The relative contribution from this process to the extensive formation of chlorinated organic matter in natural environments remains to be empirically assessed.
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Affiliation(s)
- Per Bengtson
- Department of Biology - Microbial Ecology, Lund University, The Ecology Building, Lund SE-223 62, Sweden
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Arakawa Y, Akiyama Y, Furukawa H, Suda W, Amachi S. Growth stimulation of iodide-oxidizing α-Proteobacteria in iodide-rich environments. MICROBIAL ECOLOGY 2012; 63:522-531. [PMID: 22138964 DOI: 10.1007/s00248-011-9986-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 11/11/2011] [Indexed: 05/31/2023]
Abstract
α-Proteobacteria that can oxidize iodide (I(-)) to molecular iodine (I(2)) have only been isolated from iodide-rich natural and artificial environments, i.e., natural gas brine waters and seawaters supplemented with iodide, respectively. To understand the growth characteristics of such iodide-oxidizing bacteria (IOB) under iodide-rich environments, microcosms comprising natural seawater and 1 mM iodide were prepared, and the succession of microbial communities was monitored by culture-independent techniques. PCR-denaturing gradient gel electrophoresis and 16S rRNA gene sequence analysis showed that bacteria closely related with known IOB were predominant in the microcosms after several weeks of incubation. Quantitative PCR analysis targeting specific 16S rRNA gene regions of IOB showed that the relative abundance of IOB in the microcosms was 6-76% of the total bacterial population, whereas that in natural seawater was less than 1%. When 10(3) cells mL(-1) of IOB were inoculated into natural seawater supplemented with 0.1-1 mM iodide, significant growth (cell densities, 10(5)-10(6) cells mL(-1)) and I(2) production (6-32 μM) were observed. Interestingly, similar growth stimulation occurred when 12-44 μM of I(2) was added to seawater, instead of iodide. IOB were found to be more I(2) tolerant than the other heterotrophic bacteria in seawater. These results suggest that I(2) plays a key role in the growth stimulation of IOB in seawater. IOB could potentially attack other bacteria with I(2) to occupy their ecological niche in iodide-rich environments.
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Affiliation(s)
- Yumi Arakawa
- Department of Applied Biosciences, Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo City, Chiba, 271-8510, Japan
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Nitschke U, Ruth AA, Dixneuf S, Stengel DB. Molecular iodine emission rates and photosynthetic performance of different thallus parts of Laminaria digitata (Phaeophyceae) during emersion. PLANTA 2011; 233:737-48. [PMID: 21188416 DOI: 10.1007/s00425-010-1334-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 12/09/2010] [Indexed: 05/30/2023]
Abstract
The emission of molecular iodine (I(2)) from the stipe, the meristematic area and the distal blade of the brown macroalga Laminaria digitata (Hudson) Lamouroux (Phaeophyceae) was monitored under low light and dark conditions. Photosynthetic parameters were determined to investigate both the extent of stress experienced by different thallus parts and the effects of emersion on photosynthesis. Immediately after air exposure, intense I(2) emission was detectable from all thallus parts. I(2) emission declined continuously over a period of 180 min following the initial burst, but was not affected by the light regime. The total number of mole of I(2) emitted by stipes was approximately 10 times higher than those emitted from other thallus parts. Initial I(2) emission rates (measured within 30 min of exposure to air) were highest for stipes (median values: 2,999 and 5,222 pmol g(-1) dw min(-1) in low light and dark, respectively) and lower, by one order of magnitude, for meristematic regions and distal blades. After exposure to air for between 60 and 180 min, I(2) emission rates of all thallus parts were reduced by 70-80%. Air exposure resulted in a decrease of the maximum photosystem II (PSII) efficiency (F(v)/F(m)) by 3%, and in a 25-55% increase of the effective PSII quantum efficiency (F(v)/F'(m)); this was caused by a higher fraction of open reaction centres (q(P)), whereas the efficiency of the latter in capturing energy (F'(v)/F'(m)) remained constant. The results indicate the presence of an iodine pool which is easily volatilised and depleted due to air exposure, even under apparently low stress conditions.
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Affiliation(s)
- Udo Nitschke
- Botany and Plant Science, School of Natural Sciences, Ryan Institute for Environmental, Marine and Energy Research, National University of Ireland Galway, Galway, Ireland
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50
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Toda H, Itoh N. Isolation and characterization of a gene encoding a S-adenosyl-l-methionine-dependent halide/thiol methyltransferase (HTMT) from the marine diatom Phaeodactylum tricornutum: Biogenic mechanism of CH(3)I emissions in oceans. PHYTOCHEMISTRY 2011; 72:337-343. [PMID: 21227473 DOI: 10.1016/j.phytochem.2010.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Revised: 11/19/2010] [Accepted: 12/03/2010] [Indexed: 05/27/2023]
Abstract
Several marine algae including diatoms exhibit S-adenosyl-l-methionine (SAM) halide/thiol methyltransferase (HTMT) activity, which is involved in the emission of methyl halides. In this study, the in vivo biogenic emission of methyl iodide from the diatom Phaeodactylum tricornutum was found to be clearly correlated with iodide concentration in the incubation media. The gene encoding HTMT (Pthtmt) was isolated from P. tricornutum CCAP 1055/1, and expressed in Escherichia coli. The molecular weight of the enzyme was 29.7kDa including a histidine tag, and the optimal pH was around pH 7.0. The kinetic properties of recombinant PtHTMT towards Cl(-), Br(-), I(-), [SH](-), [SCN](-), and SAM were 637.88mM, 72.83mM, 8.60mM, 9.92mM, 7.9mM, and 0.016mM, respectively, and were similar to those of higher-plant HTMTs, except that the activity towards thiocyanate was lower. The biogenic emission of methyl halides from the cultured cells and the enzymatic properties of HTMT suggest that the HMT/HTMT reaction is key to understanding the biogenesis of methyl halides in oceanic environments as well as terrestrial ones.
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Affiliation(s)
- Hiroshi Toda
- Department of Biotechnology, Faculty of Engineering, Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
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