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Chen F, Ma J, Pan K. Synergistic effect of silicon availability and salinity on metal adsorption in a common estuarine diatom. J Environ Sci (China) 2025; 148:364-374. [PMID: 39095171 DOI: 10.1016/j.jes.2024.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 08/04/2024]
Abstract
Increasing nitrogen and phosphorus discharge and decreasing sediment input have made silicon (Si) a limiting element for diatoms in estuaries. Disturbances in nutrient structure and salinity fluctuation can greatly affect metal uptake by estuarine diatoms. However, the combined effects of Si and salinity on metal accumulation in these diatoms have not been evaluated. In this study, we aimed to investigate how salinity and Si availability combine to influence the adsorption of metals by a widely distributed diatom Phaeodactylum tricornutum. Our data indicate that replete Si and low salinity in seawater can enhance cadmium and copper adsorption onto the diatom surface. At the single-cell level, surface potential was a dominant factor determining metal adsorption, while surface roughness also contributed to the higher metal loading capacity at lower salinities. Using a combination of non-invasive micro-test technology, atomic force microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy, we demonstrate that the diversity and abundance of the functional groups embedded in diatom cell walls vary with salinity and Si supply. This results in a change in the cell surface potential and transient metal influx. Our study provides novel mechanisms to explain the highly variable metal adsorption capacity of a model estuarine diatom.
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Affiliation(s)
- Fengyuan Chen
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen 518060, China; Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Jie Ma
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Ke Pan
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen 518060, China; Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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2
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Kang S, Woo Y, Seo Y, Yoo D, Kwon D, Park H, Lee SD, Yoo HY, Lee T. A Descriptive Review on the Potential Use of Diatom Biosilica as a Powerful Functional Biomaterial: A Natural Drug Delivery System. Pharmaceutics 2024; 16:1171. [PMID: 39339207 PMCID: PMC11434644 DOI: 10.3390/pharmaceutics16091171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Revised: 08/29/2024] [Accepted: 09/02/2024] [Indexed: 09/30/2024] Open
Abstract
Although various chemically synthesized materials are essential in medicine, food, and agriculture, they can exert unexpected side effects on the environment and human health by releasing certain toxic chemicals. Therefore, eco-friendly and biocompatible biomaterials based on natural resources are being actively explored. Recently, biosilica derived from diatoms has attracted attention in various biomedical fields, including drug delivery systems (DDS), due to its uniform porous nano-pattern, hierarchical structure, and abundant silanol functional groups. Importantly, the structural characteristics of diatom biosilica improve the solubility of poorly soluble substances and enable sustained release of loaded drugs. Additionally, diatom biosilica predominantly comprises SiO2, has high biocompatibility, and can easily hybridize with other DDS platforms, including hydrogels and cationic DDS, owing to its strong negative charge and abundant silanol groups. This review explores the potential applications of various diatom biosilica-based DDS in various biomedical fields, with a particular focus on hybrid DDS utilizing them.
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Affiliation(s)
- Sunggu Kang
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea
| | - Yeeun Woo
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea
| | - Yoseph Seo
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea
| | - Daehyeon Yoo
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea
| | - Daeryul Kwon
- Protist Research Division, Biological Resources Research Department, Nakdonggang National Institute of Biological Resources (NNIBR), 137, Donam 2-gil, Sangju-si 37242, Gyeongsangbuk-do, Republic of Korea
| | - Hyunjun Park
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea
| | - Sang Deuk Lee
- Protist Research Division, Biological Resources Research Department, Nakdonggang National Institute of Biological Resources (NNIBR), 137, Donam 2-gil, Sangju-si 37242, Gyeongsangbuk-do, Republic of Korea
| | - Hah Young Yoo
- Department of Biotechnology, Sangmyung University, 20, Hongjimun 2-gil, Jongno-gu, Seoul 03016, Republic of Korea
| | - Taek Lee
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea
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Martínez-Pérez C, Zweifel ST, Pioli R, Stocker R. Space, the final frontier: The spatial component of phytoplankton-bacterial interactions. Mol Microbiol 2024. [PMID: 38970428 DOI: 10.1111/mmi.15293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 06/17/2024] [Accepted: 06/24/2024] [Indexed: 07/08/2024]
Abstract
Microscale interactions between marine phytoplankton and bacteria shape the microenvironment of individual cells, impacting their physiology and ultimately influencing global-scale biogeochemical processes like carbon and nutrient cycling. In dilute environments such as the ocean water column, metabolic exchange between microorganisms likely requires close proximity between partners. However, the biological strategies to achieve this physical proximity remain an understudied aspect of phytoplankton-bacterial associations. Understanding the mechanisms by which these microorganisms establish and sustain spatial relationships and the extent to which spatial proximity is necessary for interactions to occur, is critical to learning how spatial associations influence the ecology of phytoplankton and bacterial communities. Here, we provide an overview of current knowledge on the role of space in shaping interactions among ocean microorganisms, encompassing behavioural and metabolic evidence. We propose that characterising phytoplankton-bacterial interactions from a spatial perspective can contribute to a mechanistic understanding of the establishment and maintenance of these associations and, consequently, an enhanced ability to predict the impact of microscale processes on ecosystem-wide phenomena.
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Affiliation(s)
- Clara Martínez-Pérez
- Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, Switzerland
| | - Sophie T Zweifel
- Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, Switzerland
| | - Roberto Pioli
- Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, Switzerland
| | - Roman Stocker
- Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, Switzerland
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4
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Landoulsi J. Surface (bio)-functionalization of metallic materials: How to cope with real interfaces? Adv Colloid Interface Sci 2024; 325:103054. [PMID: 38359674 DOI: 10.1016/j.cis.2023.103054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 02/17/2024]
Abstract
Metallic materials are an important class of biomaterials used in various medical devices, owing to a suitable combination of their mechanical properties. The (bio)-functionalization of their surfaces is frequently performed for biocompatibility requirements, as it offers a powerful way to control their interaction with biological systems. This is particularly important when physicochemical processes and biological events, mainly involving proteins and cells, are initiated at the host-material interface. This review addresses the state of "real interfaces" in the context of (bio)-functionalization of metallic materials, and the necessity to cope with it to avoid frequent improper evaluation of the procedure used. This issue is, indeed, well-recognized but often neglected and emerges from three main issues: (i) ubiquity of surface contamination with organic compounds, (ii) reactivity of metallic surfaces in biological medium, and (iii) discrepancy in (bio)-functionalization procedures between expectations and reality. These disturb the assessment of the strategies adopted for surface modifications and limit the possibilities to provide guidelines for their improvements. For this purpose, X-ray photoelectrons spectroscopy (XPS) comes to the rescue. Based on significant progresses made in methodological developments, and through a large amount of data compiled to generate statistically meaningful information, and to insure selectivity, precision and accuracy, the state of "real interfaces" is explored in depth, while looking after the two main constituents: (i) the bio-organic adlayer, in which the discrimination between the compounds of interest (anchoring molecules, coupling agents, proteins, etc) and organic contaminants can be made, and (ii) the metallic surface, which undergoes dynamic processes due to their reactivity. Moreover, through one of the widespread (bio)-functionalization strategy, given as a case study, a particular attention is devoted to describe the state of the interface at different stages (composition, depth distribution of contaminants and (bio)compounds of interest) and the mode of protein retention. It is highlighted, in particular, that the occurrence or improvement of bioactivity does not demonstrate that the chemical schemes worked in reality. These aspects are particularly essential to make progress on the way to choose the suitable (bio)-functionalization strategy and to provide guidelines to improve its efficiency.
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Affiliation(s)
- Jessem Landoulsi
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75005 Paris, France; Laboratoire de Biomécanique & Bioingénierie, CNRS, Université de Technologie de Compiègne, 20529 F-60205 Compiègne Cedex, France.
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Xu H, Liu H, Chen F, Zhang X, Zhang Z, Ma J, Pan K, Liu H. Ocean acidification affects physiology of coccolithophore Emiliania huxleyi and weakens its mechanical resistance to copepods. MARINE ENVIRONMENTAL RESEARCH 2023; 192:106232. [PMID: 37866975 DOI: 10.1016/j.marenvres.2023.106232] [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: 07/31/2023] [Revised: 10/12/2023] [Accepted: 10/15/2023] [Indexed: 10/24/2023]
Abstract
The effects of ocean acidification (OA) on coccolithophore's photosynthesis, calcification rates, and growth have been extensively studied. However, how the intracellular Ca2+, mechanical properties and chemical composition of the coccoliths are affected by OA have not yet been investigated. This study tries to fill these gaps using Emiliania huxleyi as a model coccolithophore. When the seawater pCO2 increased from 400 μatm to 1200 μatm, the intracellular Ca2+ and coccolith area were reduced by 66% and 36%, respectively. Single-cell mapping by atomic force microscopy revealed that the modulus and hardness of coccolith decreased from 23.6 ± 0.2 GPa to 12.0 ± 5.5 GPa and from 0.53 ± 0.15 GPa to 0.20 ± 0.06 GPa, respectively. Additionally, the proportional organic matter and silicon in the coccolith surfaces increased with pCO2. The copepods Acartia pacifica fed on more E. huxleyi grown at higher pCO2. Our study implies that OA could change coccolithophore's competitive interactions with other phytoplankton and ultimately influence carbon export to the deep ocean.
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Affiliation(s)
- Huo Xu
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen, China; Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Haijiao Liu
- Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin, China
| | - Fengyuan Chen
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen, China; Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Xiaodong Zhang
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen, China; Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Zhen Zhang
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen, China; Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Jie Ma
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Ke Pan
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen, China; Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen, China.
| | - Hongbin Liu
- Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong, China; Hong Kong Branch of Southern Marine Science & Engineering Guangdong Laboratory, The Hong Kong University of Science and Technology, Hong Kong, China.
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Zheng HX, Yang YL, Liu WS, Zhong Y, Cao Y, Qiu RL, Liu C, van der Ent A, Hodson MJ, Tang YT. Rare earth elements detoxification mechanism in the hyperaccumulator Dicranopteris linearis: [silicon-pectin] matrix fixation. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131254. [PMID: 36965356 DOI: 10.1016/j.jhazmat.2023.131254] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 05/03/2023]
Abstract
Dicranopteris linearis is the best-known hyperaccumulator species of rare earth elements (REEs) and silicon (Si), capable of dealing with toxic level of REEs. Hence, this study aimed to clarify how D. linearis leaves cope with excessive REE stress, and whether Si plays a role in REE detoxification. The results show that lanthanum (La - as a representative of the REEs) stress led to decreased biomass and an increase of metabolism related to leaf cell wall synthesis and modification. However, the La stress-induced responses, especially the increase of pectin-related gene expression level, pectin polysaccharides concentration, and methylesterase activity, could be mitigated by Si supply. Approximately 70% of the Si in D. linearis leaves interacted with the cell walls to form organosilicon Si-O-C linkages. The Si-modified cell walls contained more hydroxyl groups, leading to a more efficient REE retention compared to the Si-free ones. Moreover, this [Si-cell wall] matrix increased the pectin-La accumulation capacity by 64%, with no effect on hemicellulose-La and cellulose-La accumulation capacity. These results suggest that [Si-pectin] matrix fixation is key in REE detoxification in D. linearis, laying the foundation for the development of phytotechnological applications (e.g., REE phytomining) using this species in REE-contaminated sites.
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Affiliation(s)
- Hong-Xiang Zheng
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou 510006, China
| | - Yu-Lu Yang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou 510006, China
| | - Wen-Shen Liu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou 510006, China.
| | - Ying Zhong
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou 510006, China
| | - Yue Cao
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou 510006, China
| | - Rong-Liang Qiu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Chong Liu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Antony van der Ent
- Laboratory of Genetics, Wageningen University and Research, The Netherlands; Laboratoire Sols et Environnement, INRAE, Université de Lorraine, France; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Martin J Hodson
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Ye-Tao Tang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangdong Provincial Engineering Research Center for Heavy Metal Contaminated Soil Remediation, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China.
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Chen F, Ma J, Zhong Z, Liu H, Miao A, Zhu X, Pan K. Silicon Limitation Impairs the Tolerance of Marine Diatoms to Pristine Microplastics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3291-3300. [PMID: 36799767 DOI: 10.1021/acs.est.2c09305] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Marine diatoms are currently facing increasing threats from microplastic (MP) pollution that is intertwined with the disturbed nutrient stoichiometry in seawater. The effects of nutrient imbalances such as silicon (Si) limitation on the interactions between diatoms and MPs remain poorly understood. In contrast to previous studies which mainly focused on MP toxicity, this study emphasizes how Si availability affects nano-scale interactions between pristine polystyrene MPs and diatom surfaces. Results showed that Si-starved cells were less tolerant to MP toxicity than the Si-enriched counterparts. Si limitation significantly changed the configuration and chemical composition of the perforated frustules, forming less negatively charged, more adhesive, and mechanically weaker cells. All of these changes facilitated the adsorption and hetero-aggregation between the diatom cells and MPs and compromised the diatoms' resistance to MP attack. Our study provides novel insights into the effects of pristine MPs in the marine environment under the context of dynamic nutrient conditions.
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Affiliation(s)
- Fengyuan Chen
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen 518060, Guangdong Province, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, Guangdong Province, China
| | - Jie Ma
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, Guangdong Province, China
| | - Zihan Zhong
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, Guangdong Province, China
| | - Hongbin Liu
- Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong 999077, Special Administrative Region, China
| | - Aijun Miao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, China
| | - Xiaoshan Zhu
- College of Ecology and Environment, Hainan University, Haikou 570228, Hainan, China
| | - Ke Pan
- SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen 518060, Guangdong Province, China
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, Guangdong Province, China
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Lobus NV, Kulikovskiy MS. The Co-Evolution Aspects of the Biogeochemical Role of Phytoplankton in Aquatic Ecosystems: A Review. BIOLOGY 2023; 12:92. [PMID: 36671784 PMCID: PMC9855382 DOI: 10.3390/biology12010092] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/12/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023]
Abstract
In freshwater and marine ecosystems, the phytoplankton community is based on microalgae and cyanobacteria, which include phylogenetically very diverse groups of oxygenic photoautotrophs. In the process of evolution, they developed a wide range of bio(geo)chemical adaptations that allow them to effectively use solar radiation, CO2, and nutrients, as well as major and trace elements, to form O2 and organic compounds with a high chemical bond energy. The inclusion of chemical elements in the key processes of energy and plastic metabolism in the cell is determined by redox conditions and the abundance and metabolic availability of elements in the paleoenvironment. Geochemical evolution, which proceeded simultaneously with the evolution of biosystems, contributed to an increase in the number of metals and trace elements acting as cofactors of enzymes involved in metabolism and maintaining homeostasis in the first photoautotrophs. The diversity of metal-containing enzymes and the adaptive ability to replace one element with another without losing the functional properties of enzymes ensured the high ecological plasticity of species and allowed microalgae and cyanobacteria to successfully colonize a wide variety of habitats. In this review, we consider the main aspects of the modern concepts of the biogeochemical evolution of aquatic ecosystems and the role of some metals in the main bioenergetic processes in photosynthetic prokaryotes and eukaryotes. We present generalized data on the efficiency of the assimilation of key nutrients by phytoplankton and their importance in the cycle of carbon, silicon, nitrogen, phosphorus, sulfur, and iron. This article presents modern views on the evolutionary prerequisites for the formation of elemental signatures in different systematic groups of microalgae, as well as the possibility of using the stoichiometric ratio in the study of biological and geochemical processes in aquatic ecosystems.
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Affiliation(s)
- Nikolay V. Lobus
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya St. 35, 127276 Moscow, Russia
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9
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Ma J, Chen F, Zhou B, Zhang Z, Pan K. Effects of nitrogen and phosphorus availability on cadmium tolerance in the marine diatom Phaeodactylum tricornutum. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156615. [PMID: 35691352 DOI: 10.1016/j.scitotenv.2022.156615] [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: 07/29/2021] [Revised: 05/11/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
Although the influence of major nutrients on metal toxicity in marine phytoplankton has been widely explored, the mechanisms involving the cell surface are poorly understood. Here, the model marine diatom Phaeodactylum tricornutum was cultured under different nitrogen (N), and phosphorus (P) availabilities from the f/2 to the f/20 level in the laboratory; the diatom's accumulation of cadmium (Cd) and the effects of the physical and chemical properties of the cell wall were investigated at the single-cell level. Under higher N and/or P supply at the f/2 level, both the adsorption and uptake of Cd were enhanced in the P. tricornutum cells. The N and P increased the ion-binding sites on the cell surface, causing more negative surface potential and less depolarization of the diatoms' cell walls. Up-regulated transporter genes were detected in those cells with enriched nutrient supply, which could be attributed to the higher Cd uptake. These results strongly indicate that N and P are critical nutrients for frustule-mediated metal accumulation and tolerance in marine diatoms. Our study provides new clues on the nutrient-dependent cell-surface physical and chemical mechanisms involved in metal toxicity in marine diatoms.
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Affiliation(s)
- Jie Ma
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Fengyuan Chen
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong, SAR, China
| | - Beibei Zhou
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Zhen Zhang
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Department of Ocean Science, The Hong Kong University of Science and Technology, Hong Kong, SAR, China
| | - Ke Pan
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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Chromium adsorption using Sargassum filipendula algae waste from alginate extraction: Batch and fixed-bed column studies. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100341] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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11
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Fan J, Bao Q, Ma K, Li X, Jia J, Wu H. Antioxidant and innate immunity of Danio rerio against Edwardsiella tarda in response to diets including three kinds of marine microalgae. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Magnesium rescues the morphology of Bacillus subtilis mreB mutants through its inhibitory effect on peptidoglycan hydrolases. Sci Rep 2022; 12:1137. [PMID: 35064120 PMCID: PMC8782873 DOI: 10.1038/s41598-021-04294-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 12/06/2021] [Indexed: 02/04/2023] Open
Abstract
Cell wall homeostasis in bacteria is tightly regulated by balanced synthesis and degradation of peptidoglycan (PG), allowing cells to expand their sacculus during growth while maintaining physical integrity. In rod-shaped bacteria, actin-like MreB proteins are key players of the PG elongation machinery known as the Rod complex. In the Gram-positive model bacterium Bacillus subtilis depletion of the essential MreB leads to loss of rod shape and cell lysis. However, millimolar concentrations of magnesium in the growth medium rescue the viability and morphological defects of mreB mutants by an unknown mechanism. Here, we used a combination of cytological, biochemical and biophysical approaches to investigate the cell surface properties of mreB null mutant cells and the interactions of Mg2+ with the cell wall of B. subtilis. We show that ∆mreB cells have rougher and softer surfaces, and changes in PG composition indicative of increased DL- and DD-endopeptidase activities as well as increased deacetylation of the sugar moieties. Increase in DL-endopeptidase activity is mitigated by excess Mg2+ while DD-endopeptidase activity remains high. Visualization of PG degradation in pulse-chase experiments showed anisotropic PG hydrolase activity along the sidewalls of ∆mreB cells, in particular at the sites of increased cell width and bulging, while PG synthesis remained isotropic. Overall, our data support a model in which divalent cations maintain rod shape in ∆mreB cells by inhibiting PG hydrolases, possibly through the formation of crosslinks with carboxyl groups of the PG meshwork that affect the capacity of PG hydrolases to act on their substrate.
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13
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Chasapis CT, Peana M, Bekiari V. Structural Identification of Metalloproteomes in Marine Diatoms, an Efficient Algae Model in Toxic Metals Bioremediation. Molecules 2022; 27:378. [PMID: 35056698 PMCID: PMC8779346 DOI: 10.3390/molecules27020378] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/18/2021] [Accepted: 01/04/2022] [Indexed: 01/10/2023] Open
Abstract
The biosorption of pollutants using microbial organisms has received growing interest in the last decades. Diatoms, the most dominant group of phytoplankton in oceans, are (i) pollution tolerant species, (ii) excellent biological indicators of water quality, and (iii) efficient models in assimilation and detoxification of toxic metal ions. Published research articles connecting proteomics with the capacity of diatoms for toxic metal removal are very limited. In this work, we employed a structural based systematic approach to predict and analyze the metalloproteome of six species of marine diatoms: Thalassiosira pseudonana, Phaeodactylum tricornutum, Fragilariopsis cylindrus, Thalassiosira oceanica, Fistulifera solaris, and Pseudo-nitzschia multistriata. The results indicate that the metalloproteome constitutes a significant proportion (~13%) of the total diatom proteome for all species investigated, and the proteins binding non-essential metals (Cd, Hg, Pb, Cr, As, and Ba) are significantly more than those identified for essential metals (Zn, Cu, Fe, Ca, Mg, Mn, Co, and Ni). These findings are most likely related to the well-known toxic metal tolerance of diatoms. In this study, metalloproteomes that may be involved in metabolic processes and in the mechanisms of bioaccumulation and detoxification of toxic metals of diatoms after exposure to toxic metals were identified and described.
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Affiliation(s)
- Christos T. Chasapis
- Department of Animal Production, Fisheries and Aquaculture, University of Patras, 30200 Messolonghi, Greece
- Department of Crop Science, University of Patras, 30200 Messolonghi, Greece;
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology, Hellas (FORTH/ICE-HT), 26504 Patras, Greece
| | - Massimiliano Peana
- Department of Chemistry and Pharmacy, University of Sassari, 07100 Sassari, Italy
| | - Vlasoula Bekiari
- Department of Crop Science, University of Patras, 30200 Messolonghi, Greece;
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14
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Wang L, Liu J, Filipiak M, Mungunkhuyag K, Jedynak P, Burczyk J, Fu P, Malec P. Fast and efficient cadmium biosorption by Chlorella vulgaris K-01 strain: The role of cell walls in metal sequestration. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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15
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Multi-Element Composition of Diatom Chaetoceros spp. from Natural Phytoplankton Assemblages of the Russian Arctic Seas. BIOLOGY 2021; 10:biology10101009. [PMID: 34681108 PMCID: PMC8533213 DOI: 10.3390/biology10101009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/30/2021] [Accepted: 10/04/2021] [Indexed: 01/29/2023]
Abstract
Simple Summary Despite the long history of studying the elemental composition of phytoplankton and its individual ecological and systematic groups or specific algae species, the global dataset is far from completed. Our original research aims to study the elemental composition of a certain taxonomic group of marine diatoms, whose representatives make a significant contribution to primary production in the Arctic Ocean. The data on the chemical composition of diatom microalgae are discussed concerning their role in the global biogeochemical circulation of elements in the ocean. In particular, the obtained data make a prominent input to the study of the multi-element composition of marine diatom species, namely Chaetoceros spp., inhabiting the shelf seas of the Arctic Ocean. These data may be used as a basis for the cultivation of marine diatom strains for obtaining commercially promising producers of biogenic silica or valuable biological products that can be used as raw materials in the production of feed and nutrition for agriculture and aquaculture. Abstract Data on the elemental composition of the diatom Chaetoceros spp. from natural phytoplankton communities of Arctic marine ecosystems are presented for the first time. Samples were collected during the 69th cruise (22 August–26 September 2017) of the R/V Akademik Mstislav Keldysh in the Kara, Laptev, and East Siberian Seas. The multi-element composition of the diatom microalgae was studied by ICP-AES and ICP-MS methods. The contents of major (Na, Mg, Al, Si, P, S, K and Ca), trace (Li, Be, B, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, As, Se, Rb, Sr, Mo, Ag, Cd, Sn, Sb, Cs, Ba, Hg, Tl, Pb, Bi, Th and U) and rare earth (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) elements varied greatly, which was probably associated with the peculiarities of the functional state and mineral nutrition of phytoplankton in the autumn period. Biogenic silicon was the dominant component of the chemical composition of Chaetoceros spp., averaging 19.10 ± 0.58% of dry weight (DW). Other significant macronutrients were alkaline (Na and K) and alkaline earth (Ca and Mg) metals as well as biogenic (S and P) and essential (Al and Fe) elements. Their total contents varied from 1.26 to 2.72% DW, averaging 2.07 ± 0.43% DW. The Al:Si ratio for natural assemblages of Chaetoceros spp. of the shelf seas of the Arctic Ocean was 5.8 × 10−3. The total concentrations of trace and rare earth elements on average were 654.42 ± 120.07 and 4.14 ± 1.37 μg g−1 DW, respectively. We summarize the scarce data on the average chemical composition of marine and oceanic phytoplankton and discuss the limitations and approaches of such studies. We conclude on the lack of data and the need for further targeted studies on this issue.
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Li Y, Ma Q, Pan Y, Chen Q, Sun Z, Hu P. Development of an effective flocculation method by utilizing the auto-flocculation capability of Phaeodactylum tricornutum. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102413] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Pu J, Wang L, Zhang W, Ma J, Zhang X, Putnis CV. Organically-bound silicon enhances resistance to enzymatic degradation and nanomechanical properties of rice plant cell walls. Carbohydr Polym 2021; 266:118057. [PMID: 34044915 DOI: 10.1016/j.carbpol.2021.118057] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/02/2021] [Accepted: 04/05/2021] [Indexed: 12/31/2022]
Abstract
Plant cell walls exhibit excellent mechanical properties, which form the structural basis for sustainable bioresources and multifunctional nanocelluloses. The wall nanomechanical properties of living cells through covalent modifications of hybrid inorganic elements, such as silicon, may confer significant influence on local mechano-response and enzymatic degradation. Here, we present a combination of ex situ measurements of enzyme-released oligosaccharide fragments using MALDI-TOF MS and in situ atomic force microscopy (AFM) imaging through PeakForce quantitative nanomechanical mapping of tip-functionalized single-molecule enzyme-polysaccharide substrate recognition and the nanoscale dissolution kinetics of individual cellulose microfibrils of living rice (Oryza sativa) cells following silicate cross-linking of cell wall xyloglucan. We find that xyloglucan-bound silicon enhances the resistance to degradation by cellulase and improves the wall nanomechanical properties in the elastic modulus at the single-cell level. The findings establish a direct link between an inorganic element of silicon and the nanoscale architecture of plant cell wall materials for sustainable utilization.
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Affiliation(s)
- Junbao Pu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Wenjun Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Jie Ma
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiuqing Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Christine V Putnis
- Institut für Mineralogie, University of Münster, 48149, Münster, Germany; School of Molecular and Life Science, Curtin University, 6845, Perth, Australia
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18
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Turnšek J, Brunson JK, Viedma MDPM, Deerinck TJ, Horák A, Oborník M, Bielinski VA, Allen AE. Proximity proteomics in a marine diatom reveals a putative cell surface-to-chloroplast iron trafficking pathway. eLife 2021; 10:e52770. [PMID: 33591270 PMCID: PMC7972479 DOI: 10.7554/elife.52770] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 02/15/2021] [Indexed: 12/16/2022] Open
Abstract
Iron is a biochemically critical metal cofactor in enzymes involved in photosynthesis, cellular respiration, nitrate assimilation, nitrogen fixation, and reactive oxygen species defense. Marine microeukaryotes have evolved a phytotransferrin-based iron uptake system to cope with iron scarcity, a major factor limiting primary productivity in the global ocean. Diatom phytotransferrin is endocytosed; however, proteins downstream of this environmentally ubiquitous iron receptor are unknown. We applied engineered ascorbate peroxidase APEX2-based subcellular proteomics to catalog proximal proteins of phytotransferrin in the model marine diatom Phaeodactylum tricornutum. Proteins encoded by poorly characterized iron-sensitive genes were identified including three that are expressed from a chromosomal gene cluster. Two of them showed unambiguous colocalization with phytotransferrin adjacent to the chloroplast. Further phylogenetic, domain, and biochemical analyses suggest their involvement in intracellular iron processing. Proximity proteomics holds enormous potential to glean new insights into iron acquisition pathways and beyond in these evolutionarily, ecologically, and biotechnologically important microalgae.
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Affiliation(s)
- Jernej Turnšek
- Biological and Biomedical Sciences, The Graduate School of Arts and Sciences, Harvard UniversityCambridgeUnited States
- Department of Systems Biology, Harvard Medical SchoolBostonUnited States
- Wyss Institute for Biologically Inspired Engineering, Harvard UniversityBostonUnited States
- Integrative Oceanography Division, Scripps Institution of Oceanography, University of California San DiegoLa JollaUnited States
- Center for Research in Biological Systems, University of California San DiegoLa JollaUnited States
- Microbial and Environmental Genomics, J. Craig Venter InstituteLa JollaUnited States
| | - John K Brunson
- Microbial and Environmental Genomics, J. Craig Venter InstituteLa JollaUnited States
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San DiegoLa JollaUnited States
| | | | - Thomas J Deerinck
- National Center for Microscopy and Imaging Research, University of California San DiegoLa JollaUnited States
| | - Aleš Horák
- Biology Centre CAS, Institute of ParasitologyČeské BudějoviceCzech Republic
- University of South Bohemia, Faculty of ScienceČeské BudějoviceCzech Republic
| | - Miroslav Oborník
- Biology Centre CAS, Institute of ParasitologyČeské BudějoviceCzech Republic
- University of South Bohemia, Faculty of ScienceČeské BudějoviceCzech Republic
| | - Vincent A Bielinski
- Synthetic Biology and Bioenergy, J. Craig Venter InstituteLa JollaUnited States
| | - Andrew Ellis Allen
- Integrative Oceanography Division, Scripps Institution of Oceanography, University of California San DiegoLa JollaUnited States
- Microbial and Environmental Genomics, J. Craig Venter InstituteLa JollaUnited States
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19
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Forero López AD, Truchet DM, Rimondino GN, Maisano L, Spetter CV, Buzzi NS, Nazzarro MS, Malanca FE, Furlong O, Fernández Severini MD. Microplastics and suspended particles in a strongly impacted coastal environment: Composition, abundance, surface texture, and interaction with metal ions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 754:142413. [PMID: 33254940 DOI: 10.1016/j.scitotenv.2020.142413] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 05/19/2023]
Abstract
The composition and the interaction of the suspended particulate matter (SPM) with metal ions, along with the presence and characteristics of microplastics, were analyzed for the first time in the water column of the inner zone of Bahía Blanca Estuary during winter (June, July, and August) 2019. Surface analysis techniques (Scanning Electron Microscopy combined with Energy Dispersive X-ray Spectroscopy, X-ray Photoelectron Spectroscopy, and X-ray Diffraction) were employed to obtain an in-depth characterization of the particulate matter, suggesting the presence of Fe in our samples, with a mixture of Fe3+/Fe2+ oxidation states. Microplastics ranged in concentrations between 3 and 11.5 items L-1, with an average of 6.50 items L-1 (S.E: ±4.01), being fibers the most abundant type. Infrared Spectroscopy suggests that these fibers correspond to semi-synthetic cellulose-based and poly(amide) remains. We concluded that the SPM is a significant vehicle for metals which might have adverse effects on marine organisms.
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Affiliation(s)
- A D Forero López
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina.
| | - D M Truchet
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - G N Rimondino
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - L Maisano
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Geología, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - C V Spetter
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Química, Universidad Nacional del Sur (UNS), Avenida Alem 1253, B8000CPB Bahía Blanca, Buenos Aires, Argentina
| | - N S Buzzi
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), San Juan 670, B8000ICN Bahía Blanca, Buenos Aires, Argentina
| | - M S Nazzarro
- Instituto de Física Aplicada (INFAP), Departamento de Física, CONICET-Universidad Nacional de San Luis, Av. Ejército de los Andes 950, 5700 San Luis, Argentina
| | - F E Malanca
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - O Furlong
- Instituto de Física Aplicada (INFAP), Departamento de Física, CONICET-Universidad Nacional de San Luis, Av. Ejército de los Andes 950, 5700 San Luis, Argentina
| | - M D Fernández Severini
- Instituto Argentino de Oceanografía (IADO), CONICET/UNS, CCT-Bahía Blanca, Camino La Carrindanga, km 7.5, Edificio E1, B8000FWB Bahía Blanca, Buenos Aires, Argentina.
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20
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Ma J, Zhou B, Chen F, Pan K. How marine diatoms cope with metal challenge: Insights from the morphotype-dependent metal tolerance in Phaeodactylum tricornutum. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111715. [PMID: 33396046 DOI: 10.1016/j.ecoenv.2020.111715] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/14/2020] [Accepted: 11/22/2020] [Indexed: 06/12/2023]
Abstract
Metal tolerance in marine diatoms vary between morphotypes, strains, and species due to their long-term adaptations to stochastic environments. The mechanisms underlying this highly variable trait remain a matter of interest in ecotoxicology. In this study, we used several cutting-edge techniques, including a non-invasive micro-test technique, atomic force microscopy, and X-ray photoelectron spectroscopy to examine cadmium (Cd) accumulation and tolerance in the three morphotypes of Phaeodactylum tricornutum. Subcellular Cd distribution, metal transporter expression, and glutathione and phytochelatin activity were also analyzed to characterize the morphology-dependent Cd homeostasis and detoxification. We found that the oval morphotype accumulated more Cd, but was also more Cd tolerant than the other morphotypes. The greater surface binding of Cd to the oval morphotype is attributable to its smaller spherical form, rougher cell surface, and lower surface potential. Moreover, the oval morphotype was less permeable to Cd ions and contained higher phytochelatin and glutathione levels, which explained its higher metal tolerance. Our study offers new explanations for diatom's adaptations to changing environments that may contribute to its evolutionary success.
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Affiliation(s)
- Jie Ma
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Beibei Zhou
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Fengyuan Chen
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Ke Pan
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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21
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Zhai W, Wei E, Li R, Ji T, Jiang Y, Wang X, Liu Y, Ding Z, Zhou H. Characterization and Evaluation of the Pro-Coagulant and Immunomodulatory Activities of Polysaccharides from Bletilla striata. ACS OMEGA 2021; 6:656-665. [PMID: 33458518 PMCID: PMC7807737 DOI: 10.1021/acsomega.0c05171] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Bletilla striata is widely used for stanching bleeding. In this study, polysaccharides from B. striata (BSP) were extracted by hot water. Four polysaccharides named BSP-1-BSP-4 were fractionated using DEAE-52 cellulose. BSP fractions contained sulfate, and the degrees of substitution of BSP-3 and BSP-4 were 1.59 and 1.70, respectively. Analysis of monosaccharide composition showed that four polysaccharides were mainly composed of mannan and glucose. The in vitro results showed that BSP-1-BSP-4 elicited pro-coagulant capacities by shortening the activating partial thromboplastin time, prothrombin time, and thrombin time and elevating the fibrinogen content. Immunomodulatory activity was evaluated by MTT assay, the pinocytic capacity and NO production. Although BSP fractions did not affect RAW 264.7 cell viability, they, especially BSP-2, enhanced the immunomodulatory activity by increasing the pinocytic capacity and NO production. Overall, BSP may be developed as a potential coagulant with immunomodulatory effects.
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Affiliation(s)
- Wanchen Zhai
- School
of Pharmaceutical Sciences, Jilin University, Changchun 130012, PR China
| | - Enwei Wei
- Bethune
Institute of Epigenetic Medicine, The First Hospital, Jilin University, Changchun 130012, PR China
| | - Rui Li
- Department
of Pharmacy, China-Japan Union Hospital
of Jilin University, Changchun 130012, PR China
| | - Tianyi Ji
- School
of Pharmaceutical Sciences, Jilin University, Changchun 130012, PR China
| | - Yueyao Jiang
- School
of Pharmaceutical Sciences, Jilin University, Changchun 130012, PR China
| | - Xiaoxiao Wang
- Jilin
Engineering Research Center for Agricultural Resources and Comprehensive
Utilization, Jilin Institute of Chemical
Technology, Jilin 132022, PR China
| | - Yiying Liu
- Jilin
Engineering Research Center for Agricultural Resources and Comprehensive
Utilization, Jilin Institute of Chemical
Technology, Jilin 132022, PR China
| | - Zhiying Ding
- School
of Pharmaceutical Sciences, Jilin University, Changchun 130012, PR China
| | - Hongli Zhou
- Jilin
Engineering Research Center for Agricultural Resources and Comprehensive
Utilization, Jilin Institute of Chemical
Technology, Jilin 132022, PR China
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22
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Abstract
Diatoms are microalgae organisms that have a cover of silica, with a fascinating ordered porous structure that varies in size, giving them some different characteristics. Because of their different size, shape, and structure, it has incredible properties, letting them be capable of been functionalized with other particles. Therefore, due to the ordered pore structure, the high surface area, biocompatibility, availability, and low processing cost, they present a growing potential for drug delivery when talking about silica materials, natural and synthetic, not to mention that is less expensive and a green alternative.
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Affiliation(s)
- Dario Castro
- School of Biological Science and Engineering Yachay Tech. Ecuador
| | - Joselyn Cuasquer
- School of Biological Science and Engineering Yachay Tech. Ecuador
| | - Eva Chavez
- School of Biological Science and Engineering Yachay Tech. Ecuador
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23
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Ma J, Zhou B, Tan Q, Zhang L, Pan K. The roles of silicon in combating cadmium challenge in the Marine diatom Phaeodactylum tricornutum. JOURNAL OF HAZARDOUS MATERIALS 2020; 389:121903. [PMID: 31879097 DOI: 10.1016/j.jhazmat.2019.121903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/26/2019] [Accepted: 12/14/2019] [Indexed: 06/10/2023]
Abstract
Marine phytoplankton possess a sophisticated homeostatic network to counteract metal toxicity. Changes in environmental conditions such as ambient nutrient concentrations can significantly impact their intrinsic metal sensitivity. In this study, we evaluated the role of silicon (Si) in counteracting cadmium (Cd) toxicity in the marine diatom Phaeodactylum tricornutum. We first demonstrated that Si enrichment dramatically enhanced Cd tolerance and changed the Cd accumulation in the diatom. Our modeling suggested that Si-enriched cells adsorbed more Cd but had a higher Cd elimination rate than the Si-starved cells. Examinations by atomic force microscopy and X-ray photoelectron spectroscopy revealed that the Si-enriched cells had better silification and more SiO- in the cell walls, which markedly lowered the surface potential of the diatom cells and allowed them to attract more Cd. Although the Si-enriched cells tended to have a high Cd burden when facing Cd stress, they suppressed the increase of intracellular Cd by both down-regulating the influx transporter ZIP and up-regulating the efflux transporter ATPase5-1B. Our study shows the significant roles Si plays in maintaining metal homeostasis and combating Cd challenge in marine diatoms.
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Affiliation(s)
- Jie Ma
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Beibei Zhou
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Qiaoguo Tan
- Key Laboratory of the Coastal and Wetland Ecosystems of Ministry of Education, College of the Environment and Ecology and Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian, 361102, China
| | - Li Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Ke Pan
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China.
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24
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Coelho CM, de Andrade JR, da Silva MGC, Vieira MGA. Removal of propranolol hydrochloride by batch biosorption using remaining biomass of alginate extraction from Sargassum filipendula algae. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:16599-16611. [PMID: 32128732 DOI: 10.1007/s11356-020-08109-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/14/2020] [Indexed: 06/10/2023]
Abstract
Propranolol hydrochloride is a popular anti-hypertensive and pollutant of emerging concern because of potential ecological risks to aquatic environment. In this study, biosorption is presented as an advanced approach for propranolol uptake from aqueous media. The remaining biomass of alginate extraction from brown seaweed (RSF) was tested as biosorbent owing to its key binding sites, namely carboxyl and hydroxyl functional groups. The high 93% removal efficiency achieved consolidates RSF as effective biosorbent for propranolol environmental remediation and values this waste material, which has been largely discarded in industry after alginate extraction. RSF had morphology, porosity, chemical composition, and thermal behavior characterized prior and post to application in propranolol biosorption. Molecular sieving effects were excluded by assessing the molecular geometry of propranolol. The kinetics was inspected by both rate laws and mass transfer models. Langmuir, Freundlich, and Dubinin-Radushkevich equations were tested for experimental isotherms. Propranolol biosorption onto RSF was further inspected by thermodynamic parameters, including isosteric heat.
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Affiliation(s)
- Caroline Macedo Coelho
- School of Chemical Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil
| | - Júlia Resende de Andrade
- School of Chemical Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil.
| | - Meuris Gurgel Carlos da Silva
- School of Chemical Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil
| | - Melissa Gurgel Adeodato Vieira
- School of Chemical Engineering, University of Campinas, Cidade Universitária Zeferino Vaz, Albert Einstein Avenue, 500, Campinas, São Paulo, 13083-852, Brazil.
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25
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Singh R, Khan MJ, Rane J, Gajbhiye A, Vinayak V, Joshi KB. Biofabrication of Diatom Surface by Tyrosine‐Metal Complexes:Smart Microcontainers to Inhibit Bacterial Growth. ChemistrySelect 2020. [DOI: 10.1002/slct.201904248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ramesh Singh
- Department of ChemistrySchool of Chemical Science and TechnologyDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Mohd Jahir Khan
- Diatom Nanoengineering and Metabolism Lab (DNM)School of Applied SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Jagdish Rane
- Department of Pharmaceutical SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Ashmita Gajbhiye
- Department of Pharmaceutical SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Vandana Vinayak
- Diatom Nanoengineering and Metabolism Lab (DNM)School of Applied SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Khashti Ballabh Joshi
- Department of ChemistrySchool of Chemical Science and TechnologyDr. Harisingh Gour Central University Sagar MP 470003 India
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Defects in nanosilica catalytically convert CO 2 to methane without any metal and ligand. Proc Natl Acad Sci U S A 2020; 117:6383-6390. [PMID: 32156731 DOI: 10.1073/pnas.1917237117] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Active and stable metal-free heterogeneous catalysts for CO2 fixation are required to reduce the current high level of carbon dioxide in the atmosphere, which is driving climate change. In this work, we show that defects in nanosilica (E' centers, oxygen vacancies, and nonbridging oxygen hole centers) convert CO2 to methane with excellent productivity and selectivity. Neither metal nor complex organic ligands were required, and the defect alone acted as catalytic sites for carbon dioxide activation and hydrogen dissociation and their cooperative action converted CO2 to methane. Unlike metal catalysts, which become deactivated with time, the defect-containing nanosilica showed significantly better stability. Notably, the catalyst can be regenerated by simple heating in the air without the need for hydrogen gas. Surprisingly, the catalytic activity for methane production increased significantly after every regeneration cycle, reaching more than double the methane production rate after eight regeneration cycles. This activated catalyst remained stable for more than 200 h. Detailed understanding of the role of the various defect sites in terms of their concentrations and proximities as well as their cooperativity in activating CO2 and dissociating hydrogen to produce methane was achieved.
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Bernaerts TM, Gheysen L, Foubert I, Hendrickx ME, Van Loey AM. The potential of microalgae and their biopolymers as structuring ingredients in food: A review. Biotechnol Adv 2019; 37:107419. [DOI: 10.1016/j.biotechadv.2019.107419] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 07/15/2019] [Accepted: 07/16/2019] [Indexed: 12/11/2022]
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Costa CSD, Queiroz BGM, Landers R, da Silva MGC, Vieira MGA. Equilibrium study of binary mixture biosorption of Cr(III) and Zn(II) by dealginated seaweed waste: investigation of adsorption mechanisms using X-ray photoelectron spectroscopy analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:28470-28480. [PMID: 30091076 DOI: 10.1007/s11356-018-2880-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
The alginate extraction residue (RES) from the Brazilian Sargassum filipendula was successfully employed as biosorbent in this binary equilibrium study, revealing a greater affinity and selectivity for Cr(III) than for Zn(II). Experimental results also revealed that the process is of endothermic nature and well adjusted by Langmuir-Freundlich binary model. The X-ray photoelectron spectroscopy (XPS) analysis revealed that coordination with hydroxyl groups of RES prevailed in Cr removal, followed by carboxyl-metal complexation. As far as Zn(II) is concerned, ion exchange with carboxylate groups of RES was the largest contributor. Nevertheless, scanning electron microscopy coupled with Fourier transform infrared spectroscopy indicated the participation of sulfate functions in a minor degree.
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Affiliation(s)
- Camila Stefanne Dias Costa
- School of Chemical Engineering, University of Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-852, Brazil
| | - Bruno Galdeano Mello Queiroz
- School of Chemical Engineering, University of Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-852, Brazil
| | - Richard Landers
- Institute of Physics Gleb Wataghin, University of Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas,, São Paulo, Brazil
| | - Meuris Gurgel Carlos da Silva
- School of Chemical Engineering, University of Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-852, Brazil
| | - Melissa Gurgel Adeodato Vieira
- School of Chemical Engineering, University of Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-852, Brazil.
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29
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Host selection and stochastic effects influence bacterial community assembly on the microalgal phycosphere. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101489] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Zhang P, Burel C, Plasson C, Kiefer-Meyer MC, Ovide C, Gügi B, Wan C, Teo G, Mak A, Song Z, Driouich A, Lerouge P, Bardor M. Characterization of a GDP-Fucose Transporter and a Fucosyltransferase Involved in the Fucosylation of Glycoproteins in the Diatom Phaeodactylum tricornutum. FRONTIERS IN PLANT SCIENCE 2019; 10:610. [PMID: 31164895 PMCID: PMC6536626 DOI: 10.3389/fpls.2019.00610] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/25/2019] [Indexed: 05/21/2023]
Abstract
Although Phaeodactylum tricornutum is gaining importance in plant molecular farming for the production of high-value molecules such as monoclonal antibodies, little is currently known about key cell metabolism occurring in this diatom such as protein glycosylation. For example, incorporation of fucose residues in the glycans N-linked to protein in P. tricornutum is questionable. Indeed, such epitope has previously been found on N-glycans of endogenous glycoproteins in P. tricornutum. Meanwhile, the potential immunogenicity of the α(1,3)-fucose epitope present on plant-derived biopharmaceuticals is still a matter of debate. In this paper, we have studied molecular actors potentially involved in the fucosylation of the glycoproteins in P. tricornutum. Based on sequence similarities, we have identified a putative P. tricornutum GDP-L-fucose transporter and three fucosyltransferase (FuT) candidates. The putative P. tricornutum GDP-L-fucose transporter coding sequence was expressed in the Chinese Hamster Ovary (CHO)-gmt5 mutant lacking its endogenous GDP-L-fucose transporter activity. We show that the P. tricornutum transporter is able to rescue the fucosylation of proteins in this CHO-gmt5 mutant cell line, thus demonstrating the functional activity of the diatom transporter and its appropriate Golgi localization. In addition, we overexpressed one of the three FuT candidates, namely the FuT54599, in P. tricornutum and investigated its localization within Golgi stacks of the diatom. Our findings show that overexpression of the FuT54599 leads to a significant increase of the α(1,3)-fucosylation of the diatom endogenous glycoproteins.
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Affiliation(s)
- Peiqing Zhang
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Carole Burel
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
| | - Carole Plasson
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
| | - Marie-Christine Kiefer-Meyer
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
| | - Clément Ovide
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
| | - Bruno Gügi
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
| | - Corrine Wan
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Gavin Teo
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Amelia Mak
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Zhiwei Song
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Azeddine Driouich
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
| | - Patrice Lerouge
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
| | - Muriel Bardor
- Laboratoire Glyco-MEV EA4358, UNIROUEN, Normandy University, Rouen, France
- Fédération de Recherche Normandie-Végétal – FED 4277, Rouen, France
- Institut Universitaire de France (I.U.F.), Paris, France
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Ma J, Zhou B, Duan D, Pan K. Salinity-dependent nanostructures and composition of cell surface and its relation to Cd toxicity in an estuarine diatom. CHEMOSPHERE 2019; 215:807-814. [PMID: 30359950 DOI: 10.1016/j.chemosphere.2018.10.128] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/15/2018] [Accepted: 10/17/2018] [Indexed: 06/08/2023]
Abstract
The interactions between metal and phytoplankton are affected by salinity in estuarine environments. While water chemistry is an important factor regulating the metal bioavailability in phytoplankton, the physiological adaptation of the algae cells may also change their intrinsic response to metals. In this work, we tried to interpret the salinity-dependent Cd toxicity in a pennate diatom Nitzchia closterium from a biological side. As with many studies, we observed Cd toxicity to the diatom increased with decreasing salinity. However, changing free Cd ion concentrations may be partly responsible for the enhanced Cd toxicity. Multiple evidences showed that diatom cells acclimated at low salinity had stronger intrinsic Cd adsorption capacity. Salinity significantly affected not only the nanostructures but also the biochemical composition in the cell surface of the diatom. Diatom cells grown at lower salinity had a lower surface potential, higher specific surface area, and more sulfur-containing groups in the cell wall, leading to stronger Cd binding capacity in the cells. Meanwhile, more Si was present as poly-silicic acid when the salinity decreased. The change of Si content and speciation in the cell wall are also considered a major reason for the variations of Cd surface binding. Our study provided new clues for the salinity-dependent metal toxicity in marine diatoms.
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Affiliation(s)
- Jie Ma
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Beibei Zhou
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Dandan Duan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Ke Pan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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32
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Ma J, Zhou B, Duan D, Wei Y, Pan K. Silicon limitation reduced the adsorption of cadmium in marine diatoms. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 202:136-144. [PMID: 30031253 DOI: 10.1016/j.aquatox.2018.07.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/12/2018] [Accepted: 07/14/2018] [Indexed: 06/08/2023]
Abstract
The nitrogen (N) and phosphorus (P) loadings in coastal waters have greatly increased due to anthropogenic input. However, the silicate levels have remained stable in the past decades, leading to nutrient status alternating from N limitation to Si limitation. Few studies have examined the effects of such nutrient imbalance on Cd accumulation in marine diatoms. In the present study, we provide multiple lines of evidence that Si limitation reduced the Cd binding capability in the marine diatom Nitzschia closterium. Diatom cells adapted to lower Si exposure had weaker mechanical strength and less negatively charged surfaces. Close examination of the cell surface revealed that Si shortage changed the biochemical composition of the cell surface and decreased the diatom's silicification ability. The lower density of the silanol groups in the cell wall is the most likely reason for the weaker Cd adsorption ability observed in the Si limited diatom cells. This study demonstrates the significance of Si in controlling the metal accumulation in marine diatoms.
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Affiliation(s)
- Jie Ma
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Beibei Zhou
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Dandan Duan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Yang Wei
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Ke Pan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.
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Turco A, Moglianetti M, Corvaglia S, Rella S, Catelani T, Marotta R, Malitesta C, Pompa PP. Sputtering-Enabled Intracellular X-ray Photoelectron Spectroscopy: A Versatile Method To Analyze the Biological Fate of Metal Nanoparticles. ACS NANO 2018; 12:7731-7740. [PMID: 30004662 DOI: 10.1021/acsnano.8b01612] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The investigation of the toxicological profile and biomedical potential of nanoparticles (NPs) requires a deep understanding of their intracellular fate. Various techniques are usually employed to characterize NPs upon cellular internalization, including high-resolution optical and electron microscopies. Here, we show a versatile method, named sputtering-enabled intracellular X-ray photoelectron spectroscopy, proving that it is able to provide valuable information about the behavior of metallic NPs in culture media as well as within cells, directly measuring their internalization, stability/degradation, and oxidation state, without any preparative steps. The technique can also provide nanoscale vertical resolution along with semiquantitative information about the cellular internalization of the metallic species. The proposed approach is easy-to-use and can become a standard technique in nanotoxicology/nanomedicine and in the rational design of metallic NPs. Two model cases were investigated: silver nanoparticles (AgNPs) and platinum nanoparticles (PtNPs) with the same size and coating. We observed that, after 48 h incubation, intracellular AgNPs were almost completely dissolved, forming nanoclusters as well as AgO, AgS, and AgCl complexes. On the other hand, PtNPs were resistant to the harsh endolysosomal environment, and only some surface oxidation was detected after 48 h.
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Affiliation(s)
- Antonio Turco
- Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.) , Università del Salento , via Monteroni , 73100 Lecce , Italy
| | - Mauro Moglianetti
- Nanobiointeractions and Nanodiagnostics, Center for Biomolecular Nanotechnologies , Istituto Italiano di Tecnologia , via Barsanti , 73010 Arnesano, Lecce , Italy
| | - Stefania Corvaglia
- Nanobiointeractions and Nanodiagnostics, Center for Biomolecular Nanotechnologies , Istituto Italiano di Tecnologia , via Barsanti , 73010 Arnesano, Lecce , Italy
| | - Simona Rella
- Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.) , Università del Salento , via Monteroni , 73100 Lecce , Italy
| | | | | | - Cosimino Malitesta
- Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.) , Università del Salento , via Monteroni , 73100 Lecce , Italy
| | - Pier Paolo Pompa
- Nanobiointeractions and Nanodiagnostics, Center for Biomolecular Nanotechnologies , Istituto Italiano di Tecnologia , via Barsanti , 73010 Arnesano, Lecce , Italy
- Istituto Italiano di Tecnologia , Nanobiointeractions and Nanodiagnostics , via Morego 30 , 16163 Genova , Italy
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35
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Towards a better understanding of the flocculation/flotation mechanism of the marine microalgae Phaeodactylum tricornutum under increased pH using atomic force microscopy. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.06.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Gille A, Hollenbach R, Trautmann A, Posten C, Briviba K. Effect of sonication on bioaccessibility and cellular uptake of carotenoids from preparations of photoautotrophic Phaeodactylum tricornutum. Food Res Int 2017; 118:40-48. [PMID: 30898351 DOI: 10.1016/j.foodres.2017.12.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 10/24/2017] [Accepted: 12/14/2017] [Indexed: 01/30/2023]
Abstract
With regard to its cost-effective cultivation and the composition of high-value nutrients, the diatom Phaeodactylum tricornutum (P. tricornutum) attracts interest for the use in human nutrition. Besides a number of important nutrients, it is rich in carotenoids. Therefore, this study aimed to investigate the potential of P. tricornutum as a carotenoid source for human nutrition. In photoautotrophically produced P. tricornutum biomass the carotenoid constitution, bioaccessibility (in vitro digestion model) and cellular uptake in differentiated Caco-2 cells (Transwell model system) was determined. Furthermore, the influence of sonication on these parameters was investigated. The results indicate that β-carotene, zeaxanthin and fucoxanthin were the main carotenoids found in P. tricornutum. Moreover, these carotenoids showed a good bioaccessibility (β-carotene: 25%, zeaxanthin: 27%, fucoxanthin: 57%), which is further improved by sonication for β-carotene and fucoxanthin. In line with the good bioaccessibility, fucoxanthin was the most abundant carotenoid in Caco-2 cells followed by zeaxanthin. In contrast, β-carotene could not be detected in the cells. The present study demonstrated that P. tricornutum represents a good source of carotenoids, particularly fucoxanthin. Thus, this diatom can contribute to the intake of bioaccessible carotenoids, even without processing. In addition, sonication might be a useful tool to improve the carotenoid bioaccessibility.
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Affiliation(s)
- Andrea Gille
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Physiology and Biochemistry of Nutrition, Karlsruhe.
| | - Rebecca Hollenbach
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Physiology and Biochemistry of Nutrition, Karlsruhe
| | - Andreas Trautmann
- Karlsruhe Institute of Technology (KIT), Institute of Process Engineering in Life Sciences III Bioprocess Engineering, Karlsruhe
| | - Clemens Posten
- Karlsruhe Institute of Technology (KIT), Institute of Process Engineering in Life Sciences III Bioprocess Engineering, Karlsruhe
| | - Karlis Briviba
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Physiology and Biochemistry of Nutrition, Karlsruhe
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Exploratory Testing of Diatom Silica to Map the Role of Material Attributes on Cell Fate. Sci Rep 2017; 7:14138. [PMID: 29075005 PMCID: PMC5658353 DOI: 10.1038/s41598-017-13285-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 09/19/2017] [Indexed: 02/07/2023] Open
Abstract
Porous silica is an attractive biomaterial in many applications, including drug-delivery systems, bone-graft fillers and medical devices. The issue with porous silica biomaterials is the rate at which they resorb and the significant role played by interfacial chemistry on the host response in vivo. This paper explores the potential of diatom-biosilica as a model tool to assist in the task of mapping and quantifying the role of surface topography and chemical cues on cell fate. Diatoms are unicellular microalgae whose cell walls are composed of, amorphous nanopatterned biosilica that cannot be replicated synthetically. Their unique nanotopography has the potential to improve understanding of interface reactions between materials and cells. This study used Cyclotella meneghiniana as a test subject to assess cytotoxicity and pro-inflammatory reactions to diatom-biosilica. The results suggest that diatom-biosilica is non-cytotoxic to J774.2 macrophage cells, and supports cell proliferation and growth. The addition of amine and thiol linkers have shown a significant effect on cytotoxicity, growth and cytokine response, thus warranting further investigation into the interfacial effects of small chemical modifications to substrate surfaces. The overall findings suggest diatom-biosilica offers a unique platform for in-depth investigation of the role played by nanotopography and chemistry in biomedical applications.
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Li J, Schiavo S, Rametta G, Miglietta ML, La Ferrara V, Wu C, Manzo S. Comparative toxicity of nano ZnO and bulk ZnO towards marine algae Tetraselmis suecica and Phaeodactylum tricornutum. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:6543-6553. [PMID: 28074370 DOI: 10.1007/s11356-016-8343-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Accepted: 12/26/2016] [Indexed: 06/06/2023]
Abstract
The wide use of ZnO nanoparticles in a number of products implies an increasing release into the marine environment, resulting in the need to evaluate the potential effects upon organisms, and particularly phytoplankton, being at the base of the throphic chain. To this aim, dose-response curves for the green alga Tetraselmis suecica and the diatom Phaeodactylum tricornutum derived from the exposure to nano ZnO (100 nm) were evaluated and compared with those obtained for bulk ZnO (200 nm) and ionic zinc. The toxic effects to both algae species were reported as no observable effect concentration (NOEC) of growth inhibition and as 1, 10, and 50% effect concentrations (EC1, EC10, and EC50). The toxicity decreased in the order nano ZnO > Zn2+ > bulk ZnO. EC50 values for nano ZnO were 3.91 [3.66-4.14] mg Zn/L towards the green microalgae and 1.09 [0.96-1.57] mg Zn/L towards the diatom, indicating a higher sensitivity of P. tricornutum. The observed diverse effects can be ascribed to the interaction occurring between different algae and ZnO particles. Due to algae motility, ZnO particles were intercepted in different phases of aggregation and sedimentation processes, while algae morphology and size can influence the level of entrapment by NP aggregates.This underlines the need to take into account the peculiarity of the biological system in the assessment of NP toxicity.
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Affiliation(s)
- Jiji Li
- University of Naples "Federico II, Parco Gussone 1, 80055, Portici, Naples, Italy
- Enea CR Portici, P. le E. Fermi, 1, 80055, Portici, Naples, Italy
- National Engineering Research Center of Maricultural Facilities of China, Zhejiang Ocean University, Haida South Road 1, 316022, Zhoushan, Zhejiang, People's Republic of China
| | - Simona Schiavo
- University of Naples "Federico II, Parco Gussone 1, 80055, Portici, Naples, Italy
- Enea CR Portici, P. le E. Fermi, 1, 80055, Portici, Naples, Italy
| | | | | | - Vera La Ferrara
- Enea CR Portici, P. le E. Fermi, 1, 80055, Portici, Naples, Italy
| | - Changwen Wu
- National Engineering Research Center of Maricultural Facilities of China, Zhejiang Ocean University, Haida South Road 1, 316022, Zhoushan, Zhejiang, People's Republic of China
| | - Sonia Manzo
- Enea CR Portici, P. le E. Fermi, 1, 80055, Portici, Naples, Italy.
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Spinthaki A, Zerfaß C, Paulsen H, Hobe S, Demadis KD. Pleiotropic Role of Recombinant Silaffin-Like Cationic Polypeptide P5S3: Peptide-Induced Silicic Acid Stabilization, Silica Formation and Inhibition of Silica Dissolution. ChemistrySelect 2016. [DOI: 10.1002/slct.201601086] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Argyro Spinthaki
- Crystal Engineering, Growth and Design Laboratory; Department of Chemistry; University of Crete; Voutes Campus, Heraklion Crete 71003 Greece
| | - Christian Zerfaß
- Department of Biology; Institute of General Botany; University of Mainz; Johannes-von-Müllerweg 6 55099 Mainz Germany
- Graduate School Materials Science in Mainz; University of Mainz, Staudingerweg 9, 55128 Mainz, Germany
| | - Harald Paulsen
- Department of Biology; Institute of General Botany; University of Mainz; Johannes-von-Müllerweg 6 55099 Mainz Germany
| | - Stephan Hobe
- Department of Biology; Institute of General Botany; University of Mainz; Johannes-von-Müllerweg 6 55099 Mainz Germany
| | - Konstantinos D. Demadis
- Crystal Engineering, Growth and Design Laboratory; Department of Chemistry; University of Crete; Voutes Campus, Heraklion Crete 71003 Greece
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Chen R, Li Y, Yan M, Sun X, Han H, Li J, Wang J, Liu L, Takahashi K. Synthesis of hybrid zinc/silyl acrylate copolymers and their surface properties in the microfouling stage. RSC Adv 2016. [DOI: 10.1039/c5ra24270c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Development of an environmentally friendly and efficient marine antifouling coating is a central goal in marine antifouling.
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Affiliation(s)
- Rongrong Chen
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
- Institute of Advanced Marine Materials
| | - Yakun Li
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
| | - Minglong Yan
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
| | - Xun Sun
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
| | - Huajing Han
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
| | - Jie Li
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
| | - Jun Wang
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
- Institute of Advanced Marine Materials
| | - Lianhe Liu
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
- Institute of Advanced Marine Materials
| | - Kazunobu Takahashi
- Key Laboratory of Superlight Material and Surface Technology
- Ministry of Education
- Harbin Engineering University
- China
- Institute of Advanced Marine Materials
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Michels MHA, van der Goot AJ, Vermuë MH, Wijffels RH. Cultivation of shear stress sensitive and tolerant microalgal species in a tubular photobioreactor equipped with a centrifugal pump. JOURNAL OF APPLIED PHYCOLOGY 2016; 28:53-62. [PMID: 26869745 PMCID: PMC4735255 DOI: 10.1007/s10811-015-0559-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/01/2015] [Accepted: 03/02/2015] [Indexed: 05/09/2023]
Abstract
The tolerance to shear stress of Tetraselmis suecica, Isochrysis galbana, Skeletonema costatum, and Chaetoceros muelleri was determined in shear cylinders. The shear tolerance of the microalgae species strongly depends on the strain. I. galbana, S. costatum, and C. muelleri exposed to shear stress between 1.2 and 5.4 Pa resulted in severe cell damage. T. suecica is not sensitive to stresses up to 80 Pa. The possibility to grow these algae in a tubular photobioreactor (PBR) using a centrifugal pump for recirculation of the algae suspension was studied. The shear stresses imposed on the algae in the circulation tubes and at the pressure side of the pump were 0.57 and 1.82 Pa, respectively. The shear stress tolerant T. suecica was successfully cultivated in the PBR. Growth of I. galbana, S. costatum, and C. muelleri in the tubular PBR was not observed, not even at the lowest pumping speed. For the latter shear sensitive strains, the encountered shear stress levels were in the order of magnitude of the determined maximum shear tolerance of the algae. An equation was used to simulate the effect of possible damage of microalgae caused by passages through local high shear zones in centrifugal pumps on the total algae culture in the PBR. This simulation shows that a culture of shear stress sensitive species is bound to collapse after only limited number of passages, confirming the importance of considering shear stress as a process parameter in future design of closed PBRs for microalgal cultivation.
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Affiliation(s)
- Michiel H. A. Michels
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
- HZ University of Applied Sciences, P.O. Box 364, 4380 AJ Vlissingen, The Netherlands
| | - Atze Jan van der Goot
- Food Process Engineering, Wageningen University, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Marian H. Vermuë
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - René H. Wijffels
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
- Faculty of Biosciences and Aquaculture, University of Nordland, 8049 Bodø, Norway
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Gügi B, Le Costaouec T, Burel C, Lerouge P, Helbert W, Bardor M. Diatom-Specific Oligosaccharide and Polysaccharide Structures Help to Unravel Biosynthetic Capabilities in Diatoms. Mar Drugs 2015; 13:5993-6018. [PMID: 26393622 PMCID: PMC4584364 DOI: 10.3390/md13095993] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 09/10/2015] [Accepted: 09/11/2015] [Indexed: 12/12/2022] Open
Abstract
Diatoms are marine organisms that represent one of the most important sources of biomass in the ocean, accounting for about 40% of marine primary production, and in the biosphere, contributing up to 20% of global CO₂ fixation. There has been a recent surge in developing the use of diatoms as a source of bioactive compounds in the food and cosmetic industries. In addition, the potential of diatoms such as Phaeodactylum tricornutum as cell factories for the production of biopharmaceuticals is currently under evaluation. These biotechnological applications require a comprehensive understanding of the sugar biosynthesis pathways that operate in diatoms. Here, we review diatom glycan and polysaccharide structures, thus revealing their sugar biosynthesis capabilities.
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Affiliation(s)
- Bruno Gügi
- Laboratoire Glyco-MEV EA 4358, Université de Rouen, Normandie Université, Institut de Recherche et d'Innovation Biomédicale (IRIB), Végétale Agronomie Sol Innovation (VASI), Normandie Université, Faculté des Sciences et Techniques, 76821 Mont-Saint-Aignan, France.
| | - Tinaïg Le Costaouec
- CNRS, Centre de Recherches sur les Macromolécules Végétales (CERMAV), Université Grenoble Alpes, CERMAV, F-38000 Grenoble, France.
| | - Carole Burel
- Laboratoire Glyco-MEV EA 4358, Université de Rouen, Normandie Université, Institut de Recherche et d'Innovation Biomédicale (IRIB), Végétale Agronomie Sol Innovation (VASI), Normandie Université, Faculté des Sciences et Techniques, 76821 Mont-Saint-Aignan, France.
| | - Patrice Lerouge
- Laboratoire Glyco-MEV EA 4358, Université de Rouen, Normandie Université, Institut de Recherche et d'Innovation Biomédicale (IRIB), Végétale Agronomie Sol Innovation (VASI), Normandie Université, Faculté des Sciences et Techniques, 76821 Mont-Saint-Aignan, France.
| | - William Helbert
- CNRS, Centre de Recherches sur les Macromolécules Végétales (CERMAV), Université Grenoble Alpes, CERMAV, F-38000 Grenoble, France.
| | - Muriel Bardor
- Laboratoire Glyco-MEV EA 4358, Université de Rouen, Normandie Université, Institut de Recherche et d'Innovation Biomédicale (IRIB), Végétale Agronomie Sol Innovation (VASI), Normandie Université, Faculté des Sciences et Techniques, 76821 Mont-Saint-Aignan, France.
- Institut Universitaire de France (IUF), 75005 Paris, France.
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Tanaka A, De Martino A, Amato A, Montsant A, Mathieu B, Rostaing P, Tirichine L, Bowler C. Ultrastructure and Membrane Traffic During Cell Division in the Marine Pennate Diatom Phaeodactylum tricornutum. Protist 2015; 166:506-21. [PMID: 26386358 PMCID: PMC4710849 DOI: 10.1016/j.protis.2015.07.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Revised: 06/05/2015] [Accepted: 07/30/2015] [Indexed: 12/14/2022]
Abstract
The marine pennate diatom Phaeodactylum tricornutum has become a model for diatom biology, due to its ease of culture and accessibility to reverse genetics approaches. While several features underlying the molecular mechanisms of cell division have been described, morphological analyses are less advanced than they are in other diatoms. We therefore examined cell ultrastructure changes prior to and during cytokinesis. Following chloroplast division, cleavage furrows are formed at both longitudinal ends of the cell and are accompanied by significant vesicle transport. Although neither spindle nor microtubules were observed, the nucleus appeared to be split by the furrow after duplication of the Golgi apparatus. Finally, centripetal cytokinesis was completed by fusion of the furrows. Additionally, F-actin formed a ring structure and its diameter became smaller, accompanying the ingrowing furrows. To further analyse vesicular transport during cytokinesis, we generated transgenic cells expressing yellow fluorescent protein (YFP) fusions with putative diatom orthologs of small GTPase Sec4 and t-SNARE protein SyntaxinA. Time-lapse observations revealed that SyntaxinA-YFP localization expands from both cell tips toward the center, whereas Sec4-YFP was found in the Golgi and subsequently relocalizes to the future division plane. This work provides fundamental new information about cell replication processes in P. tricornutum.
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Affiliation(s)
- Atsuko Tanaka
- Ecole Normale Supérieure, PSL Research University, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR 8197, INSERM U1024, 46 rue d'Ulm, F-75005 Paris, France
| | - Alessandra De Martino
- Ecole Normale Supérieure, PSL Research University, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR 8197, INSERM U1024, 46 rue d'Ulm, F-75005 Paris, France
| | - Alberto Amato
- Ecole Normale Supérieure, PSL Research University, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR 8197, INSERM U1024, 46 rue d'Ulm, F-75005 Paris, France
| | - Anton Montsant
- Ecole Normale Supérieure, PSL Research University, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR 8197, INSERM U1024, 46 rue d'Ulm, F-75005 Paris, France
| | - Benjamin Mathieu
- Imaging Platform, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR8197 INSERM U1024, 46, rue d'Ulm, 75230 Paris Cedex 05, France
| | - Philippe Rostaing
- Neuroscience Section, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR8197 INSERM U1024, 46, rue d'Ulm, 75230 Paris Cedex 05, France
| | - Leila Tirichine
- Ecole Normale Supérieure, PSL Research University, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR 8197, INSERM U1024, 46 rue d'Ulm, F-75005 Paris, France
| | - Chris Bowler
- Ecole Normale Supérieure, PSL Research University, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS UMR 8197, INSERM U1024, 46 rue d'Ulm, F-75005 Paris, France.
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He C, Ma J, Wang L. A hemicellulose-bound form of silicon with potential to improve the mechanical properties and regeneration of the cell wall of rice. THE NEW PHYTOLOGIST 2015; 206:1051-1062. [PMID: 25615017 DOI: 10.1111/nph.13282] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 12/12/2014] [Indexed: 05/02/2023]
Abstract
Silicon (Si) plays a large number of diverse roles in plants, but the structural and chemical mechanisms operating at the single-cell level remain unclear. We isolate the cell walls from suspension-cultured individual cells of rice (Oryza sativa) and fractionate them into three main fractions including cellulose (C), hemicellulose (HC) and pectin (P). We find that most of the Si is in HC as determined by inductively coupled plasma-mass spectrometry (ICP-MS), where Si may covalently crosslink the HC polysacchrides confirmed by X-ray photoelectron spectroscopy (XPS). The HC-bound form of Si could improve both the mechanical property and regeneration of the cell walls investigated by a combination of atomic force microscopy (AFM) and confocal laser scanning microscopy (CLSM). This study provides further evidence that HC could be the major ligand bound to Si, which broadens our understanding of the chemical nature of 'anomalous' Si in plant cell walls.
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Affiliation(s)
- Congwu He
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jie Ma
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
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Cicco SR, Vona D, De Giglio E, Cometa S, Mattioli-Belmonte M, Palumbo F, Ragni R, Farinola GM. Chemically Modified Diatoms Biosilica for Bone Cell Growth with Combined Drug-Delivery and Antioxidant Properties. Chempluschem 2015; 80:1104-1112. [DOI: 10.1002/cplu.201402398] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 02/12/2015] [Indexed: 11/10/2022]
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46
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Ryckebosch E, Bruneel C, Termote-Verhalle R, Muylaert K, Foubert I. Influence of extraction solvent system on extractability of lipid components from different microalgae species. ALGAL RES 2014. [DOI: 10.1016/j.algal.2013.11.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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He C, Wang L, Liu J, Liu X, Li X, Ma J, Lin Y, Xu F. Evidence for 'silicon' within the cell walls of suspension-cultured rice cells. THE NEW PHYTOLOGIST 2013; 200:700-709. [PMID: 23834738 DOI: 10.1111/nph.12401] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 06/06/2013] [Indexed: 05/04/2023]
Abstract
Despite the ubiquity and beneficial role of silicon (Si) in plant biology, structural and chemical mechanisms operating at the single-cell level have not been extensively studied. To obtain insights regarding the effect of Si on individual cells, we cultivated suspended rice (Oryza sativa) cells in the absence and presence of Si and analyzed single cells using a combination of physical techniques including atomic force microscopy (AFM). Si is naturally present as a constituent of the cell walls, where it is firmly bound to the cell wall matrix rather than occurring within intra- or extracellular silica deposition, as determined by using inductively coupled plasma mass spectrometry (ICP-MS) and X-ray photoelectron spectroscopy (XPS). This species of Si, linked with the cell wall matrix, improves the structural stability of cell walls during their expansion and subsequent cell division. Maintaining cell shape is thereby enhanced, which may be crucial for the function and survival of cells. This study provides further evidence that organosilicon is present in plant cell walls, which broadens our understanding of the chemical nature of 'anomalous Si' in plant biology.
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Affiliation(s)
- Congwu He
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jian Liu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xin Liu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xiuli Li
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jie Ma
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Fangsen Xu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
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Liu J, Ma J, He C, Li X, Zhang W, Xu F, Lin Y, Wang L. Inhibition of cadmium ion uptake in rice (Oryza sativa) cells by a wall-bound form of silicon. THE NEW PHYTOLOGIST 2013; 200:691-699. [PMID: 24102436 DOI: 10.1111/nph.12494] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 08/13/2013] [Indexed: 05/06/2023]
Abstract
The stresses acting on plants that are alleviated by silicon (Si) range from biotic to abiotic stresses, such as heavy metal toxicity. However, the mechanism of stress alleviation by Si at the single-cell level is poorly understood. We cultivated suspended rice (Oryza sativa) cells and protoplasts and investigated them using a combination of plant nutritional and physical techniques including inductively coupled plasma mass spectrometry (ICP-MS), the scanning ion-selective electrode technique (SIET) and X-ray photoelectron spectroscopy (XPS). We found that most Si accumulated in the cell walls in a wall-bound organosilicon compound. Total cadmium (Cd) concentrations in protoplasts from Si-accumulating (+Si) cells were significantly reduced at moderate concentrations of Cd in the culture medium compared with those from Si-limiting (-Si) cells. In situ measurement of cellular fluxes of the cadmium ion (Cd(2+) ) in suspension cells and root cells of rice exposed to Cd(2+) and/or Si treatments showed that +Si cells significantly inhibited the net Cd(2+) influx, compared with that in -Si cells. Furthermore, a net negative charge (charge density) within the +Si cell walls could be neutralized by an increase in the Cd(2+) concentration in the measuring solution. A mechanism of co-deposition of Si and Cd in the cell walls via a [Si-wall matrix]Cd co-complexation may explain the inhibition of Cd ion uptake, and may offer a plausible explanation for the in vivo detoxification of Cd in rice.
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Affiliation(s)
- Jian Liu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jie Ma
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Congwu He
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xiuli Li
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Wenjun Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Fangsen Xu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
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Characterization and localization of insoluble organic matrices associated with diatom cell walls: insight into their roles during cell wall formation. PLoS One 2013; 8:e61675. [PMID: 23626714 PMCID: PMC3633991 DOI: 10.1371/journal.pone.0061675] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 03/11/2013] [Indexed: 11/19/2022] Open
Abstract
Organic components associated with diatom cell wall silica are important for the formation, integrity, and function of the cell wall. Polysaccharides are associated with the silica, however their localization, structure, and function remain poorly understood. We used imaging and biochemical approaches to describe in detail characteristics of insoluble organic components associated with the cell wall in 5 different diatom species. Results show that an insoluble organic matrix enriched in mannose, likely the diatotepum, is localized on the proximal surface of the silica cell wall. We did not identify any organic matrix embedded within the silica. We also identified a distinct material consisting of glucose polymer with variable localization depending on the species. In some species this component was directly involved in the morphogenesis of silica structure while in others it appeared to be only a structural component of the cell wall. A novel glucose-rich structure located between daughter cells during division was also identified. This work for the first time correlates the structure, composition, and localization of insoluble organic matrices associated with diatom cell walls. Additionally we identified a novel glucose polymer and characterized its role during silica structure formation.
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Formation of asymmetrical structured silica controlled by a phase separation process and implication for biosilicification. PLoS One 2013; 8:e61164. [PMID: 23585878 PMCID: PMC3621999 DOI: 10.1371/journal.pone.0061164] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 03/06/2013] [Indexed: 11/19/2022] Open
Abstract
Biogenetic silica displays intricate patterns assembling from nano- to microsize level and interesting non-spherical structures differentiating in specific directions. Several model systems have been proposed to explain the formation of biosilica nanostructures. Of them, phase separation based on the physicochemical properties of organic amines was considered to be responsible for the pattern formation of biosilica. In this paper, using tetraethyl orthosilicate (TEOS, Si(OCH2CH3)4) as silica precursor, phospholipid (PL) and dodecylamine (DA) were introduced to initiate phase separation of organic components and influence silica precipitation. Morphology, structure and composition of the mineralized products were characterized using a range of techniques including field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TG-DTA), infrared spectra (IR), and nitrogen physisorption. The results demonstrate that the phase separation process of the organic components leads to the formation of asymmetrically non-spherical silica structures, and the aspect ratios of the asymmetrical structures can be well controlled by varying the concentration of PL and DA. On the basis of the time-dependent experiments, a tentative mechanism is also proposed to illustrate the asymmetrical morphogenesis. Therefore, our results imply that in addition to explaining the hierarchical porous nanopatterning of biosilica, the phase separation process may also be responsible for the growth differentiation of siliceous structures in specific directions. Because organic amine (e.g., long-chair polyamines), phospholipids (e.g., silicalemma) and the phase separation process are associated with the biosilicification of diatoms, our results may provide a new insight into the mechanism of biosilicification.
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