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Kim YJ, Hong H, Yun J, Kim SI, Jung HY, Ryu W. Photosynthetic Nanomaterial Hybrids for Bioelectricity and Renewable Energy Systems. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005919. [PMID: 33236450 DOI: 10.1002/adma.202005919] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/08/2020] [Indexed: 06/11/2023]
Abstract
Harvesting solar energy in the form of electricity from the photosynthesis of plants, algal cells, and bacteria has been researched as the most environment-friendly renewable energy technology in the last decade. The primary challenge has been the engineering of electrochemical interfacing with photosynthetic apparatuses, organelles, or whole cells. However, with the aid of low-dimensional nanomaterials, there have been many advances, including enhanced photon absorption, increased generation of photosynthetic electrons (PEs), and more efficient transfer of PEs to electrodes. These advances have demonstrated the possibility for the technology to advance to a new level. In this article, the fundamentals of photosynthesis are introduced. How PE harvesting systems have improved concerning solar energy absorption, PE production, and PE collection by electrodes is discussed. The review focuses on how different kinds of nanomaterials are applied and function in interfacing with photosynthetic materials for enhanced PE harvesting. Finally, the review analyzes how the performance of PE harvesting and stand-alone systems have evolved so far and its future prospects.
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Affiliation(s)
- Yong Jae Kim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Hyeonaug Hong
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - JaeHyoung Yun
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Seon Il Kim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Ho Yun Jung
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - WonHyoung Ryu
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
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Yamanoi Y, Nakae T, Nishihara H. Bio-organic-inorganic hybrid soft materials: photoelectric conversion systems based on photosystem I and II with molecular wires. CHEM LETT 2021. [DOI: 10.1246/cl.210111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Toyotaka Nakae
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroshi Nishihara
- Research Center for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan
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Wang P, Zhao F, Hartmann V, Nowaczyk MM, Ruff A, Schuhmann W, Conzuelo F. Reassessing the rationale behind herbicide biosensors: The case of a photosystem II/redox polymer-based bioelectrode. Bioelectrochemistry 2020; 136:107597. [PMID: 32674005 DOI: 10.1016/j.bioelechem.2020.107597] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/04/2020] [Accepted: 07/04/2020] [Indexed: 01/12/2023]
Abstract
Interfacing photosynthetic protein complexes with electrodes is frequently used for the identification of electron transfer mechanisms and the fabrication of biosensors. Binding of herbicide compounds to the terminal plastoquinone QB at photosystem II (PSII) causes disruption of electron flow that is associated with a diminished performance of the associated biodevice. Thus, the principle of electron transport inhibition at PSII can be used for herbicide detection and has inspired the fabrication of several biosensors for this purpose. However, the biosensor performance may reveal a more complex behavior than generally expected. As we present here for a photobioelectrode constituted by PSII embedded in a redox polymer matrix, the effect caused by inhibitors does not only impact the electron transfer from PSII but also the properties of the polymer film used for immobilization and electrical wiring of the protein complexes. Incorporation of phenolic inhibitors into the polymer film surprisingly translates into enhanced photocurrents and, in particular cases, in a higher stability of the overall electrode architecture. The achieved results stress the importance to evaluate first the possible influence of analytes of interest on the biosensor architecture as a whole and provide important insights for consideration in future design of bioelectrochemical devices.
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Affiliation(s)
- Panpan Wang
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Fangyuan Zhao
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Volker Hartmann
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Marc M Nowaczyk
- Plant Biochemistry, Faculty of Biology and Biotechnology, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Adrian Ruff
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Wolfgang Schuhmann
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany.
| | - Felipe Conzuelo
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany.
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Marangoni LFB, Pinto MMDAN, Marques JA, Bianchini A. Copper exposure and seawater acidification interaction: Antagonistic effects on biomarkers in the zooxanthellate scleractinian coral Mussismilia harttii. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 206:123-133. [PMID: 30472481 DOI: 10.1016/j.aquatox.2018.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 10/17/2018] [Accepted: 11/06/2018] [Indexed: 06/09/2023]
Abstract
Coral reefs are threatened by global and local impacts, such as ocean acidification (OA) and metal contamination. Toxicity of metals, such as copper (Cu), is expected to be enhanced with OA. However, the interaction between these environmental stressors is still poorly evaluated. In the present study, the interactive effects of seawater acidification and increasing Cu concentrations were evaluated in a zooxanthellate scleractinian coral (Mussismilia harttii), using biochemical biomarkers involved in the coral calcification process and the photosynthetic metabolism of endosymbionts. Corals were kept under control conditions (no seawater acidification and no Cu addition in seawater) or exposed to combined treatments of reduced seawater pH (8.1, 7.8, 7.5 and 7.2) and environmentally relevant concentrations of dissolved Cu (measured: 1.0, 1.6, 2.3 and 3.2 μg/L) in a mesocosm system. After 15- and 35-days exposure, corals were analyzed for photochemical efficiency (Fv/Fm), chlorophyll a content, Ca-ATPase and carbonic anhydrase (CA) activity. Results showed that 76% of the interactions between reduced seawater pH and increasing Cu concentrations were antagonistic. Only 24% of these interactions were additive or synergistic. In general, the combination of stressors had no significant deleterious effects in the photosynthetic metabolism of endosymbionts or Ca-ATPase activity. In fact, the lowest dissolved Cu concentration tested had a consistent positive effect on Ca-ATPase activity in corals facing any of the reduced seawater pH conditions tested. In turn, potentially deleterious effects on acid-base balance in M. harttii, associated with changes in CA activity, were intensified by the combination of stressors. Findings reported here indicate that Cu toxicity in future OA scenarios can be less severe than previously suggested in this coral holobiont.
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Affiliation(s)
- Laura Fernandes Barros Marangoni
- Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, Km 8, Rio Grande, RS, 96203-900, Brazil; Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45, 807-000, Brazil.
| | | | - Joseane Aparecida Marques
- Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, Km 8, Rio Grande, RS, 96203-900, Brazil; Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45, 807-000, Brazil
| | - Adalto Bianchini
- Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, Km 8, Rio Grande, RS, 96203-900, Brazil; Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45, 807-000, Brazil; Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Av. Itália, Km 8, Rio Grande, RS, 96203-900, Brazil
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Bucur B, Munteanu FD, Marty JL, Vasilescu A. Advances in Enzyme-Based Biosensors for Pesticide Detection. BIOSENSORS 2018; 8:E27. [PMID: 29565810 PMCID: PMC6022933 DOI: 10.3390/bios8020027] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/18/2018] [Accepted: 03/20/2018] [Indexed: 01/10/2023]
Abstract
The intensive use of toxic and remanent pesticides in agriculture has prompted research into novel performant, yet cost-effective and fast analytical tools to control the pesticide residue levels in the environment and food. In this context, biosensors based on enzyme inhibition have been proposed as adequate analytical devices with the added advantage of using the toxicity of pesticides for detection purposes, being more "biologically relevant" than standard chromatographic methods. This review proposes an overview of recent advances in the development of biosensors exploiting the inhibition of cholinesterases, photosynthetic system II, alkaline phosphatase, cytochrome P450A1, peroxidase, tyrosinase, laccase, urease, and aldehyde dehydrogenase. While various strategies have been employed to detect pesticides from different classes (organophosphates, carbamates, dithiocarbamates, triazines, phenylureas, diazines, or phenols), the number of practical applications and the variety of environmental and food samples tested remains limited. Recent advances focus on enhancing the sensitivity and selectivity by using nanomaterials in the sensor assembly and novel mutant enzymes in array-type sensor formats in combination with chemometric methods for data analysis. The progress in the development of solar cells enriched the possibilities for efficient wiring of photosynthetic enzymes on different surfaces, opening new avenues for development of biosensors for photosynthesis-inhibiting herbicides.
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Affiliation(s)
- Bogdan Bucur
- National Institute of Research and Development for Biological Sciences, Centre of Bioanalysis, 296 Splaiul Independentei, 060031 Bucharest, Romania.
| | - Florentina-Daniela Munteanu
- Faculty of Food Engineering, Tourism and Environmental Protection, "Aurel Vlaicu" University of Arad, Elena Dragoi, No. 2, 310330 Arad, Romania.
| | - Jean-Louis Marty
- BAE Laboratory, Université de Perpignan via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan, France.
| | - Alina Vasilescu
- International Centre of Biodynamics, 1B Intrarea Portocalelor, 060101 Bucharest, Romania.
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Zhang P, Xiao Y, Li Z, Guo J, Lu L. Microalgae in Microwell Arrays Exhibit Differences with Those in Flasks: Evidence from Growth Rate, Cellular Carotenoid, and Oxygen Production. FRONTIERS IN PLANT SCIENCE 2018; 8:2251. [PMID: 29379513 PMCID: PMC5770892 DOI: 10.3389/fpls.2017.02251] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
Microalgae are cultivated in macro-scale reactors traditionally and the relevant knowledge is based on bulk analysis. Whether the knowledge and laws are true for cells under micro-cultivation is still unknown. To better understand microalgal physiology, micro-cultivation of microalgae, and unicellular tracking and analysis of its response in vivo is necessary. In the study, cellular responses of Chlorella vulgaris to micro-cultivation is studied, with cells in flasks as a control. Five different microwell depths ranging from 10 to 200 μm with a fixed diameter of 100 μm, and four diameter levels from 30 to 200 μm with a fixed depth 60 μm were investigated. Unicellular dynamics showed that cell number differences among various types of microwells with different initial cell numbers decreased as cultivation processed. Besides, the specific growth rate of C. vulgaris on microwell arrays was much higher than that in flasks and so cells on microwell arrsys can be much sensitive to pollutants. Thus, the interesting characteristics may be used in cell sensor applications to enhance sensitivity. The specific growth rate of C. vulgaris on microwell arrays decreased gradually as the microwell diameter increased from 30 to 200 μm while presented a unimodal trend as depth decreased from 200 to 10 μm. Furthermore, we used Raman Spectroscopy and Non-invasive Micro-test Technique to analyze cellular responses in microwells for the first time to track the changes in vivo. Results indicated that unicellular carotenoid content increased as microwells became larger and shallower. The flow rate of oxygen rose gradually as the depth increased from 10 to 100 μm, but then decreased rapidly as the depth deepened to 200 μm. In fact, it is a combined result of cell physiology and density. In summary, cells in microwells with the diameter/depth ratio ~1 owned the highest specific growth rates and oxygen flow rates. Simulations also suggested that better mass transfer occurred in microwells with higher diameter-to-depth ratios.
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Affiliation(s)
- Ping Zhang
- Department of Environmental Science and Engineering, College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, China
- CAS Key Lab of Reservoir Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
| | - Yan Xiao
- CAS Key Lab of Reservoir Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
| | - Zhe Li
- Department of Environmental Science and Engineering, College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, China
- CAS Key Lab of Reservoir Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
| | - Jinsong Guo
- Department of Environmental Science and Engineering, College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, China
| | - Lunhui Lu
- CAS Key Lab of Reservoir Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
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Li S, Huang H, Li Z, Li Z, He Z, Liang H. Chromium removal capability and photosynthetic characteristics of Cyperus alternifolius and Coix lacryma-jobi L. in vertical flow constructed wetland treated with hexavalent chromium bearing domestic sewage. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:2203-2212. [PMID: 29068350 DOI: 10.2166/wst.2017.396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, the chromium removal capability and photosynthetic capacity response of plants were investigated in vertical flow wetland microcosms (VFWM) treated with Cr(VI) bearing domestic sewage. Two plants, Cyperus alternifolius (C. alternifolius) and Coix lacryma-jobi L. (C. lacryma-jobi L.) grown in the VFWM enhanced the purification of Cr(VI) enriched domestic sewage. Cr concentration in the effluent fell below detection limit (<0.03 mg L-1), except for the C. alternifolius wetland treated with 40 mg L-1 Cr(VI). The biomasses of both plants species were increased at 10 and 20 mg L-1 Cr(VI) exposure but inhibited at 40 mg L-1 Cr(VI). The photosynthetic capacities of both plants were not affected at 10-40 mg L-1 Cr(VI) exposure during the days 20-60. However, they were inhibited significantly (P < 0.05) at 40 mg L-1 Cr(VI) exposure during days 80-100. These results demonstrated that a VFWM with C. alternifolius and/or C. lacryma-jobi L. was capable of maintaining its efficiency and recovering its vegetation. VFWM with C. alternifolius and/or C. lacryma-jobi L. was promising for purifying wastewater which contains low to medium concentrations of Cr(VI) (<20 mg L-1).
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Affiliation(s)
- Suli Li
- College of Agriculture, Guangxi University, Nanning 530005, China E-mail: ; University of Florida, Institute of Food and Agricultural Science, Indian River Research and Education Center, Fort Pierce, FL 34945, USA
| | - Hailian Huang
- College of Agriculture, Guangxi University, Nanning 530005, China E-mail:
| | - Zhigang Li
- College of Agriculture, Guangxi University, Nanning 530005, China E-mail: ; University of Florida, Institute of Food and Agricultural Science, Indian River Research and Education Center, Fort Pierce, FL 34945, USA
| | - Zhengwen Li
- College of Agriculture, Guangxi University, Nanning 530005, China E-mail:
| | - Zhenli He
- University of Florida, Institute of Food and Agricultural Science, Indian River Research and Education Center, Fort Pierce, FL 34945, USA
| | - He Liang
- College of Agriculture, Guangxi University, Nanning 530005, China E-mail:
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Marangoni LFDB, Marques JA, Duarte GAS, Pereira CM, Calderon EN, Castro CBE, Bianchini A. Copper effects on biomarkers associated with photosynthesis, oxidative status and calcification in the Brazilian coral Mussismilia harttii (Scleractinia, Mussidae). MARINE ENVIRONMENTAL RESEARCH 2017; 130:248-257. [PMID: 28823595 DOI: 10.1016/j.marenvres.2017.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 08/07/2017] [Accepted: 08/08/2017] [Indexed: 06/07/2023]
Abstract
Seawater contamination with metals, such as copper (Cu), is a notable local impact threatening coral reefs. Cu effects on biomarkers associated with photosynthesis, oxidative status and calcification were evaluated in the Brazilian coral Mussismilia harttii using a marine mesocosm facility. Polyps were kept under control conditions (1.9 μg L-1 Cu) or exposed to dissolved Cu (3.0, 4.8, and 6.7 μg L-1) for 12 days. Photochemical efficiency of the photosystem II of symbiotic algae (zooxanthellae) was measured and polyps were analyzed for antioxidant capacity, lipid peroxidation, DNA damage, and carbonic anhydrase Ca-ATPase, Mg-ATPase and (Ca,Mg)-ATPase activities after 12 days. Results highlighted the effects of Cu exposure, leading corals to an oxidative stress condition [increased total antioxidant capacity (TAC) and DNA damage] and a possible reduced calcification ability [decreased (Ca,Mg)-ATPase activity]. Therefore, biomarkers associated with oxidative status (TAC and DNA damage) and calcification [(Ca, Mg)-ATPase] are indicated as good predictors of corals health.
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Affiliation(s)
- Laura Fernandes de Barros Marangoni
- Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, km 8, Rio Grande, RS 96203-900, Brazil.
| | - Joseane Aparecida Marques
- Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, km 8, Rio Grande, RS 96203-900, Brazil.
| | - Gustavo Adolpho Santos Duarte
- Programa de Pós-graduação em Zoologia, Museu Nacional, Universidade Federal do Rio de Janeiro, Parque Quinta da Boa Vista, São Cristovão, Rio de Janeiro, RJ 20940-040, Brazil.
| | - Cristiano Macedo Pereira
- Programa de Pós-graduação em Zoologia, Museu Nacional, Universidade Federal do Rio de Janeiro, Parque Quinta da Boa Vista, São Cristovão, Rio de Janeiro, RJ 20940-040, Brazil; Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45.807-000, Brazil.
| | - Emiliano Nicolas Calderon
- Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45.807-000, Brazil; Museu Nacional, Universidade Federal do Rio de Janeiro, Parque Quinta da Boa Vista, São Cristovão, Rio de Janeiro, RJ 20940-040, Brazil; Programa de Pós-Graduação em Ciências Ambientais e Conservação, Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé, Universidade Federal do Rio de Janeiro (NUPEM/UFRJ), Av. São José do Barreto, 764, 27965-045 Macaé, RJ, Brazil.
| | - Clovis Barreira E Castro
- Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45.807-000, Brazil; Museu Nacional, Universidade Federal do Rio de Janeiro, Parque Quinta da Boa Vista, São Cristovão, Rio de Janeiro, RJ 20940-040, Brazil.
| | - Adalto Bianchini
- Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália, km 8, Rio Grande, RS 96203-900, Brazil; Instituto Coral Vivo, Rua dos Coqueiros, Parque Yaya, Santa Cruz Cabrália, BA 45.807-000, Brazil; Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Av. Itália, km 8, Rio Grande, RS 96203-900, Brazil.
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Miyachi M, Ikehira S, Nishiori D, Yamanoi Y, Yamada M, Iwai M, Tomo T, Allakhverdiev SI, Nishihara H. Photocurrent Generation of Reconstituted Photosystem II on a Self-Assembled Gold Film. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1351-1358. [PMID: 28103045 DOI: 10.1021/acs.langmuir.6b03499] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Photosystem II (PSII)-modified gold electrodes were prepared by the deposition of PSII reconstituted with platinum nanoparticles (PtNPs) on Au electrodes. PtNPs modified with 1-[15-(3,5,6-trimethyl-1,4-benzoquinone-2-yl)]pentadecyl disulfide ((TMQ(CH2)15S)2) were incorporated into the QB site of PSII isolated from thermophilic cyanobacterium Thermosynechococcus elongatus. The reconstitution was confirmed by QA-reoxidation measurements. PSII reconstituted with PtNPs was deposited and integrated on a Au(111) surface modified with 4,4'-biphenyldithiol. The cross section of the reconstituted PSII film on the Au electrode was investigated by SEM. Absorption spectra showed that the surface coverage of the electrode was about 18 pmol PSII cm-2. A photocurrent density of 15 nAcm-2 at E = +0.10 V (vs Ag/AgCl) was observed under 680 nm irradiation. The photoresponse showed good reversibility under alternating light and dark conditions. Clear photoresponses were not observed in the absence of PSII and molecular wire. These results supported the photocurrent originated from PSII and moved to a gold electrode by light irradiation, which also confirmed conjugation with orientation through the molecular wire.
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Affiliation(s)
- Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu Ikehira
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Daiki Nishiori
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masato Yamada
- Department of Biology, Faculty of Science, Tokyo University of Science , Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Masako Iwai
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology , Yokohama 226-8503, Japan
| | - Tatsuya Tomo
- Department of Biology, Faculty of Science, Tokyo University of Science , Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Suleyman I Allakhverdiev
- Controlled Photobiosynthesis Laboratory, Institute of Plant Physiology, Russian Academy of Sciences , Botanicheskaya Street 35, Moscow 127276, Russia
- Institute of Basic Biological Problems, Russian Academy of Sciences , Pushchino, Moscow Region 142290, Russia
- Faculty of Biology, M. V. Lomonosov Moscow State University , Leninskie Gory 1-12, Moscow 119991, Russia
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Grattieri M, Hasan K, Minteer SD. Bioelectrochemical Systems as a Multipurpose Biosensing Tool: Present Perspective and Future Outlook. ChemElectroChem 2016. [DOI: 10.1002/celc.201600507] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Matteo Grattieri
- Departments of Chemistry and Materials Science & Engineering University of Utah 315 S 1400 E Salt Lake City UT 84112 USA
| | - Kamrul Hasan
- Departments of Chemistry and Materials Science & Engineering University of Utah 315 S 1400 E Salt Lake City UT 84112 USA
| | - Shelley D. Minteer
- Departments of Chemistry and Materials Science & Engineering University of Utah 315 S 1400 E Salt Lake City UT 84112 USA
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Brinkert K, Le Formal F, Li X, Durrant J, Rutherford AW, Fantuzzi A. Photocurrents from photosystem II in a metal oxide hybrid system: Electron transfer pathways. BIOCHIMICA ET BIOPHYSICA ACTA 2016; 1857:1497-1505. [PMID: 26946088 PMCID: PMC4990130 DOI: 10.1016/j.bbabio.2016.03.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 02/19/2016] [Accepted: 03/01/2016] [Indexed: 12/21/2022]
Abstract
We have investigated the nature of the photocurrent generated by Photosystem II (PSII), the water oxidizing enzyme, isolated from Thermosynechococcus elongatus, when immobilized on nanostructured titanium dioxide on an indium tin oxide electrode (TiO2/ITO). We investigated the properties of the photocurrent from PSII when immobilized as a monolayer versus multilayers, in the presence and absence of an inhibitor that binds to the site of the exchangeable quinone (QB) and in the presence and absence of exogenous mobile electron carriers (mediators). The findings indicate that electron transfer occurs from the first quinone (QA) directly to the electrode surface but that the electron transfer through the nanostructured metal oxide is the rate-limiting step. Redox mediators enhance the photocurrent by taking electrons from the nanostructured semiconductor surface to the ITO electrode surface not from PSII. This is demonstrated by photocurrent enhancement using a mediator incapable of accepting electrons from PSII. This model for electron transfer also explains anomalies reported in the literature using similar and related systems. The slow rate of the electron transfer step in the TiO2 is due to the energy level of electron injection into the semiconducting material being below the conduction band. This limits the usefulness of the present hybrid electrode. Strategies to overcome this kinetic limitation are discussed.
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Affiliation(s)
- Katharina Brinkert
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
| | - Florian Le Formal
- Department of Chemistry, Imperial College London, London SW7 2AZ, UK
| | - Xiaoe Li
- Department of Chemistry, Imperial College London, London SW7 2AZ, UK
| | - James Durrant
- Department of Chemistry, Imperial College London, London SW7 2AZ, UK
| | | | - Andrea Fantuzzi
- Department of Life Sciences, Imperial College London, London SW7 2AZ, UK.
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van der Meer JR. Towards improved biomonitoring tools for an intensified sustainable multi-use environment. Microb Biotechnol 2016; 9:658-65. [PMID: 27468753 PMCID: PMC4993185 DOI: 10.1111/1751-7915.12395] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Accepted: 07/10/2016] [Indexed: 11/28/2022] Open
Abstract
The increasing use of our environment for multiple contrasting activities (e.g. fisheries, tourism) will have to be accompanied by improved monitoring of environmental quality, to avoid transboundary conflicts and ensure long-term sustainable intensified usage. Biomonitoring approaches are appropriate for this, since they can integrate biological effects of environmental exposure rather than measure individual compound concentrations. Recent advances in biomonitoring concepts and tools focus on single-cell assays and purified biological components that can be miniaturized and integrated in automated systems. Despite these advances, we are still very far from being able to deploy bioassays routinely in environmental monitoring, mostly because of lack of experience in interpreting responses and insufficient robustness of the biosensors for their environmental application. Further future challenges include broadening the spectrum of detectable compounds by biosensors, accelerate response times and combining sample pretreatment strategies with bioassays.
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Kasuno M, Kimura H, Yasutomo H, Torimura M, Murakami D, Tsukatani Y, Hanada S, Matsushita T, Tao H. An Evaluation of Sensor Performance for Harmful Compounds by Using Photo-Induced Electron Transfer from Photosynthetic Membranes to Electrodes. SENSORS 2016; 16:438. [PMID: 27023553 PMCID: PMC4850952 DOI: 10.3390/s16040438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/18/2016] [Accepted: 03/22/2016] [Indexed: 11/16/2022]
Abstract
Rapid, simple, and low-cost screening procedures are necessary for the detection of harmful compounds in the effluent that flows out of point sources such as industrial outfall. The present study investigated the effects on a novel sensor of harmful compounds such as KCN, phenol, and herbicides such as 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine (atrazine), and 2-N-tert-butyl-4-N-ethyl-6-methylsulfanyl-1,3,5-triazine-2,4-diamine (terbutryn). The sensor employed an electrode system that incorporated the photocurrent of intra-cytoplasmic membranes (so-called chromatophores) prepared from photosynthetic bacteria and linked using carbon paste electrodes. The amperometric curve (photocurrent-time curve) of photo-induced electron transfer from chromatophores of the purple photosynthetic bacterium Rhodobacter sphaeroides to the electrode via an exogenous electron acceptor was composed of two characteristic phases: an abrupt increase in current immediately after illumination (I₀), and constant current over time (Ic). Compared with other redox compounds, 2,5-dichloro-1,4-benzoquinone (DCBQ) was the most useful exogenous electron acceptor in this system. Photo-reduction of DCBQ exhibited Michaelis-Menten-like kinetics, and reduction rates were dependent on the amount of DCBQ and the photon flux intensity. The Ic decreased in the presence of KCN at concentrations over 0.05 μM (=μmol·dm(-3)). The I₀ decreased following the addition of phenol at concentrations over 20 μM. The Ic was affected by terbutryn at concentrations over 10 μM. In contrast, DCMU and atrazine had no effect on either I₀ or Ic. The utility of this electrode system for the detection of harmful compounds is discussed.
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Affiliation(s)
- Megumi Kasuno
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Otsu, Shiga 520-2194, Japan.
| | - Hiroki Kimura
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Otsu, Shiga 520-2194, Japan.
| | - Hisataka Yasutomo
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Otsu, Shiga 520-2194, Japan.
| | - Masaki Torimura
- Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8569, Japan.
| | - Daisuke Murakami
- Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8569, Japan.
| | - Yusuke Tsukatani
- Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
| | - Satoshi Hanada
- Institute for Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan.
| | - Takayuki Matsushita
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Otsu, Shiga 520-2194, Japan.
| | - Hiroaki Tao
- Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8569, Japan.
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Swainsbury DJK, Friebe VM, Frese RN, Jones MR. Evaluation of a biohybrid photoelectrochemical cell employing the purple bacterial reaction centre as a biosensor for herbicides. Biosens Bioelectron 2014; 58:172-8. [PMID: 24637165 PMCID: PMC4009402 DOI: 10.1016/j.bios.2014.02.050] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 02/17/2014] [Accepted: 02/18/2014] [Indexed: 01/21/2023]
Abstract
The Rhodobacter sphaeroides reaction centre is a relatively robust and tractable membrane protein that has potential for exploitation in technological applications, including biohybrid devices for photovoltaics and biosensing. This report assessed the usefulness of the photocurrent generated by this reaction centre adhered to a small working electrode as the basis for a biosensor for classes of herbicides used extensively for the control of weeds in major agricultural crops. Photocurrent generation was inhibited in a concentration-dependent manner by the triazides atrazine and terbutryn, but not by nitrile or phenylurea herbicides. Measurements of the effects of these herbicides on the kinetics of charge recombination in photo-oxidised reaction centres in solution showed the same selectivity of response. Titrations of reaction centre photocurrents yielded half maximal inhibitory concentrations of 208 nM and 2.1 µM for terbutryn and atrazine, respectively, with limits of detection estimated at around 8 nM and 50 nM, respectively. Photocurrent attenuation provided a direct measure of herbicide concentration, with no need for model-dependent kinetic analysis of the signal used for detection or the use of prohibitively complex instrumentation, and prospects for the use of protein engineering to develop the sensitivity and selectivity of herbicide binding by the Rba. sphaeroides reaction centre are discussed. The Rhodobacter sphaeroides reaction centre was used as a biosensor for herbicides. Herbicide concentration was assessed through the attenuation of a photocurrent. The biosensor showed selectivity for triazine herbicides. The limit of detection of the biosensor was in the low nanomolar range. Photocurrent attenuation is a simple and direct basis for a herbicide biosensor.
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Affiliation(s)
- David J K Swainsbury
- School of Biochemistry, Medical Sciences Building, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom.
| | - Vincent M Friebe
- Division of Physics and Astronomy, Department of Biophysics, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands.
| | - Raoul N Frese
- Division of Physics and Astronomy, Department of Biophysics, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands.
| | - Michael R Jones
- School of Biochemistry, Medical Sciences Building, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom.
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15
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Rovai AS, Barufi JB, Pagliosa PR, Scherner F, Torres MA, Horta PA, Simonassi JC, Quadros DPC, Borges DLG, Soriano-Sierra EJ. Photosynthetic performance of restored and natural mangroves under different environmental constraints. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 181:233-241. [PMID: 23872046 DOI: 10.1016/j.envpol.2013.06.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 06/06/2013] [Accepted: 06/09/2013] [Indexed: 06/02/2023]
Abstract
We hypothesized that the photosynthetic performance of mangrove stands restored by the single planting of mangroves species would be lowered due to residual stressors. The photosynthetic parameters of the vegetation of three planted mangrove stands, each with a different disturbance history, were compared to reference sites and correlated with edaphic environmental variables. A permutational analysis of variance showed significant interaction when the factors were compared, indicating that the photosynthetic parameters of the restoration areas differed from the reference sites. A univariate analysis of variance showed that all the photosynthetic parameters differed between sites and treatments, except for photosynthetic efficiency (αETR). The combination of environmental variables that best explained the variations observed in the photosynthetic performance indicators were Cu, Pb and elevation disruptions. Fluorescence techniques proved efficient in revealing important physiological differences, representing a powerful tool for rapid analysis of the effectiveness of initiatives aimed at restoring coastal environments.
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Affiliation(s)
- André Scarlate Rovai
- Universidade Federal de Santa Catarina, Departamento de Ecologia e Zoologia, Campus Universitário, Trindade, 88040-900 Florianópolis, SC, Brazil.
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16
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Lenaghan SC, Li Y, Zhang H, Burris JN, Stewart CN, Parker LE, Zhang M. Monitoring the Environmental Impact of TiO 2 Nanoparticles Using a Plant-Based Sensor Network. IEEE TRANSACTIONS ON NANOTECHNOLOGY 2013; 12:182-189. [PMID: 28458617 PMCID: PMC5409134 DOI: 10.1109/tnano.2013.2242089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The increased manufacturing of nanoparticles for use in cosmetics, foods, and clothing necessitates the need for an effective system to monitor and evaluate the potential environmental impact of these nanoparticles. The goal of this research was to develop a plant-based sensor network for characterizing, monitoring, and understanding the environmental impact of TiO2 nanoparticles. The network consisted of potted Arabidopsis thaliana with a surrounding water supply, which was monitored by cameras attached to a laptop computer running a machine learning algorithm. Using the proposed plant sensor network, we were able to examine the toxicity of TiO2 nanoparticles in two systems: algae and terrestrial plants. Increased terrestrial plant growth was observed upon introduction of the nanoparticles, whereas algal growth decreased significantly. The proposed system can be further automated for high-throughput screening of nanoparticle toxicity in the environment at multiple trophic levels. The proposed plant-based sensor network could be used for more accurate characterization of the environmental impact of nanomaterials.
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Affiliation(s)
- Scott C Lenaghan
- Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee, Knoxville, Knoxville, TN 37996 USA
| | - Yuanyuan Li
- Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, Knoxville, TN 37996 USA
| | - Hao Zhang
- Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, Knoxville, TN 37996 USA
| | - Jason N Burris
- Department of Plant Sciences, The University of Tennessee, Knoxville, Knoxville, TN 37996 USA
| | - C Neal Stewart
- Department of Plant Sciences, The University of Tennessee, Knoxville, Knoxville, TN 37996 USA
| | - Lynne E Parker
- Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, Knoxville, TN 37996 USA
| | - Mingjun Zhang
- Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee, Knoxville, Knoxville, TN 37996 USA
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17
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Development of a biosensor for environmental monitoring based on microalgae immobilized in silica hydrogels. SENSORS 2012; 12:16879-91. [PMID: 23223083 PMCID: PMC3571815 DOI: 10.3390/s121216879] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 11/30/2012] [Accepted: 12/04/2012] [Indexed: 12/02/2022]
Abstract
A new biosensor was designed for the assessment of aquatic environment quality. Three microalgae were used as toxicity bioindicators: Chlorella vulgaris, Pseudokirchneriella subcapitata and Chlamydomonas reinhardtii. These microalgae were immobilized in alginate and silica hydrogels in a two step procedure. After studying the growth rate of entrapped cells, chlorophyll fluorescence was measured after exposure to (3-(3,4-dichlorophenyl)-1,1-dimethylurea) (DCMU) and various concentrations of the common herbicide atrazine. Microalgae are very sensitive to herbicides and detection of fluorescence enhancement with very good efficiency was realized. The best detection limit was 0.1 μM, obtained with the strain C. reinhardtii after 40 minutes of exposure.
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18
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Chen H, Chen J, Guo Y, Wen Y, Liu J, Liu W. Evaluation of the role of the glutathione redox cycle in Cu(II) toxicity to green algae by a chiral perturbation approach. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2012; 120-121:19-26. [PMID: 22609738 DOI: 10.1016/j.aquatox.2012.04.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 04/18/2012] [Accepted: 04/19/2012] [Indexed: 06/01/2023]
Abstract
The effect of heavy metal toxicity on the environment is usually linked to changes in the glutathione redox cycle and oxidative damage as causative events. However, it is unknown whether changes in the glutathione redox cycle are a cause or result of Cu(II) toxicity. Herein, a new chiral perturbation strategy involving a chiral herbicide, dichlorprop (DCPP), as a perturbation factor was used. According to the dose-response fitting curve of DCPP and the combination with Cu(II), 40 μM (R)-DCPP and (S)-DCPP, whose toxicities were low enough to not significantly perturb the Cu(II) toxicity, were selected as the chiral perturbation factor. When Scenedesmus obliquus was incubated with the chiral perturbation factor and 10 μM Cu(II), chiral perturbation was observed in the chlorophyll content and the PAM chlorophyll fluorescence. Then, the role of the glutathione redox cycle in the toxicity of Cu(II) was evaluated with the chiral perturbation approach. The results revealed that the GSH differences in algae cells exposed to (R)-DCPP or (S)-DCPP were well correlated with the differences in the production of reactive oxygen species (ROS) after exposure to the two enantiomers. When (R)-DCPP or (S)-DCPP was added with Cu(II) to the algae culture, treatment with (R)-DCPP-Cu resulted in a decrease in the GSH content in algae cells compared to the control, whereas treatment with (S)-DCPP-Cu resulted in an increase in the GSH. The GSH/GSSG ratio and GR activity also showed similar enantioselectivities. The enantioselectivities would not exist if the changes of in glutathione redox cycle were the cause. Therefore, these data provide indirect evidence that ROS induced cell toxicity of Cu is a causative event, which results in the response of the glutathione redox cycle. These results also provided an implication that before sustainable detoxification strategies for heavy metal pollutants were proposed, it is better that the roles of ROS production and glutathione redox cycle are elucidated. In this case, the chiral perturbation strategy may be a good choice.
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Affiliation(s)
- Hui Chen
- Institute of Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
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19
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Shah VB, Orf GS, Reisch S, Harrington LB, Prado M, Blankenship RE, Biswas P. Characterization and deposition of various light-harvesting antenna complexes by electrospray atomization. Anal Bioanal Chem 2012; 404:2329-38. [PMID: 22983169 DOI: 10.1007/s00216-012-6368-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/19/2012] [Accepted: 08/20/2012] [Indexed: 01/22/2023]
Abstract
Photosynthetic organisms have light-harvesting complexes that absorb and transfer energy efficiently to reaction centers. Light-harvesting complexes (LHCs) have received increased attention in order to understand the natural photosynthetic process and also to utilize their unique properties in fabricating efficient artificial and bio-hybrid devices to capture solar energy. In this work, LHCs with different architectures, sizes, and absorption spectra, such as chlorosomes, Fenna-Matthews-Olson (FMO) protein, LH2 complex, and phycobilisome have been characterized by an electrospray-scanning mobility particle-sizer system (ES-SMPS). The size measured by ES-SMPS for FMO, chlorosomes, LH2, and phycobilisome were 6.4, 23.3, 9.5, and 33.4 nm, respectively. These size measurements were compared with values measured by dynamic light scattering and those reported in the literature. These complexes were deposited onto a transparent substrate by electrospray deposition. Absorption and fluorescence spectra of the deposited LHCs were measured. It was observed that the LHCs have light absorption and fluorescence spectra similar to that in solution, demonstrating the viability of the process.
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Affiliation(s)
- Vivek B Shah
- Aerosol and Air Quality Research Laboratory, Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
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20
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Khomutov GB. Biomimetic nanosystems and novel composite nanobiomaterials. Biophysics (Nagoya-shi) 2011. [DOI: 10.1134/s0006350911050083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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22
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Nomngongo PN, Ngila JC, Nyamori VO, Songa EA, Iwuoha EI. Determination of Selected Heavy Metals Using Amperometric Horseradish Peroxidase (HRP) Inhibition Biosensor. ANAL LETT 2011. [DOI: 10.1080/00032719.2010.539738] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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23
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Lombardi AT, Maldonado MT. The effects of copper on the photosynthetic response of Phaeocystis cordata. PHOTOSYNTHESIS RESEARCH 2011; 108:77-87. [PMID: 21519899 DOI: 10.1007/s11120-011-9655-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 04/04/2011] [Indexed: 05/30/2023]
Abstract
We investigated the effects of limiting (1.96 × 10(-9) mol l(-1) total Cu, corresponding to pCu 14.8; where pCu = -log [Cu(2+)]) and toxic Cu concentrations up to 8.0 × 10(-5) mol l(-1) total Cu (equivalent to pCu 9.5) on growth rates and photosynthetic activity of exponentially grown Phaeocystis cordata, using batch and semi-continuous cultures. With pulse amplitude modulated (PAM) fluorometry, we determined the photochemical response of P. cordata to the various Cu levels, and showed contrasting results for the batch and semi-continuous cultures. Although maximum photosystem II (PSII) quantum yield (Φ(M)) was optimal and constant in the semi-continuous P. cordata, the batch cultures showed a significant decrease in Φ(M) with culture age (0-72 h). The EC50 for the batch cultures was higher (2.0 × 10(-10) mol l(-1), pCu9.7), than that for the semi-continuous cultures (6.3 × 10(-11) mol l(-1), pCu10.2). The semi-continuous cultures exhibited a systematic and linear decrease in Φ(M) as Cu levels increased (for [Cu(2+)] < 1.0 × 10(-12) mol l(-1), pCu12.0), however, no effect of high Cu was observed on their operational PSII quantum yield (Φ'(M)). Similarly, semi-continuous cultures exhibited a significant decrease in Φ(M), but not in Φ'(M), because of low-Cu levels. Thus, Cu toxicity and Cu limitation damage the PSII reaction centers, but not the processes downstream of PSII. Quenching mechanisms (NPQ and Q (n)) were lower under high Cu relative to the controls, suggesting that toxic Cu impairs photo-protective mechanisms. PAM fluorometry is a sensitive tool for detecting minor physiological variations. However, culturing techniques (batch vs. semi-continuous) and sampling time might account for literature discrepancies on the effects of Cu on PSII. Semi-continuous culturing might be the most adequate technique to investigate Cu effects on PSII photochemistry.
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Affiliation(s)
- Ana T Lombardi
- Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada.
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24
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Krejci J, Ondruch V, Maly J, Stofik M, Krejcova D, Vranova H. High sensitivity biosensor measurement based on synchronous detection. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2011; 102:192-199. [PMID: 21196122 DOI: 10.1016/j.jphotobiol.2010.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Revised: 11/25/2010] [Accepted: 12/03/2010] [Indexed: 05/30/2023]
Abstract
The principle of synchronous detection (SD) has been applied to biosensor measurement. SD principle achieves significant increases in the signal to noise ratio, limit of detection and overall measurement robustness. Application of SD in biosensor measurement improves the analysis of the response and avoids the influence of interference/noise produced by stirring, electromagnetic effects and influence of parasitic currents. SD also enables the decomposition of signal to stimulation response and phenomena with long time of response. Second-order phenomena are identifiable in the signal. Linear statistical model was used to develop software for identification of the stimulation signal in the output current. SD was applied to the response signal of a Photosystem II complex (PSII) biosensor. PSII response to light stimulation follows first order kinetics. The inhibition kinetics of PSII has been studied. Kinetic constants of herbicide binding to PSII depend linearly on herbicide concentration and enable measurement of its concentration at low concentrations (linear range for diuron is 10⁻⁶ to 10⁻⁴ mM).
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Affiliation(s)
- J Krejci
- BVT Technologies a.s. Hudcova 78, CZ-612 00 Brno, Czech Republic.
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25
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Zamaleeva AI, Sharipova IR, Shamagsumova RV, Ivanov AN, Evtugyn GA, Ishmuchametova DG, Fakhrullin RF. A whole-cell amperometric herbicide biosensor based on magnetically functionalised microalgae and screen-printed electrodes. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2011; 3:509-513. [PMID: 32938064 DOI: 10.1039/c0ay00627k] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report the fabrication of an amperometric whole-cell herbicide biosensor based on magnetic retention of living cells functionalised with magnetic nanoparticles (MNPs) on the surface of a screen-printed electrode. We demonstrate that Chlorella pyrenoidosa microalgae cells coated with biocompatible MNPs and retained on the electrode with a permanent magnet act as a sensing element for the fast detection of herbicides. The magnetic functionalisation does not affect the viability and photosynthesis activity-mediated triazine herbicide recognition in microalgae. The current of ferricyanide ion was recorded during alternating illumination periods and biosensor fabricated was used to detect atrazine (from 0.9 to 74 µM) and propazine (from 0.6 to 120 µM) (the limits of detection 0.7 and 0.4 µM, respectively). We believe that the methodology presented here can be widely used in fabrication of a number of whole cell biosensors since it allows for efficient and reversible cells immobilisation and does not affect the cellular metabolism.
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Affiliation(s)
- Alsu I Zamaleeva
- Biomaterials and Nanomaterials Group, Department of Biochemistry, Kazan (Idel buye/Volga region) Federal University, Kreml uramı 18, Kazan, 420008, Republic of Tatarstan, RF.
| | - Ilziya R Sharipova
- Biomaterials and Nanomaterials Group, Department of Biochemistry, Kazan (Idel buye/Volga region) Federal University, Kreml uramı 18, Kazan, 420008, Republic of Tatarstan, RF.
| | - Rezeda V Shamagsumova
- Department of Analytical Chemistry, Kazan (Idel buye/Volga region) Federal University, Kreml uramı 18, Kazan, 420008, Republic of Tatarstan, RF
| | - Alexey N Ivanov
- Department of Analytical Chemistry, Kazan (Idel buye/Volga region) Federal University, Kreml uramı 18, Kazan, 420008, Republic of Tatarstan, RF
| | - Gennady A Evtugyn
- Department of Analytical Chemistry, Kazan (Idel buye/Volga region) Federal University, Kreml uramı 18, Kazan, 420008, Republic of Tatarstan, RF
| | - Dilara G Ishmuchametova
- Biomaterials and Nanomaterials Group, Department of Biochemistry, Kazan (Idel buye/Volga region) Federal University, Kreml uramı 18, Kazan, 420008, Republic of Tatarstan, RF.
| | - Rawil F Fakhrullin
- Biomaterials and Nanomaterials Group, Department of Biochemistry, Kazan (Idel buye/Volga region) Federal University, Kreml uramı 18, Kazan, 420008, Republic of Tatarstan, RF.
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Masojídek J, Souček P, Máchová J, Frolík J, Klem K, Malý J. Detection of photosynthetic herbicides: algal growth inhibition test vs. electrochemical photosystem II biosensor. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2011; 74:117-122. [PMID: 20828821 DOI: 10.1016/j.ecoenv.2010.08.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Revised: 07/13/2009] [Accepted: 08/20/2010] [Indexed: 05/29/2023]
Abstract
We compared a novel PSII-biosensor assay with a standard algal growth inhibition test for detection of photosynthetic herbicides--diuron, atrazine and isoproturon in liquid samples. To evaluate the convenience and sensitivity, values of the parameters EC50 and LOD and the duration of assays were compared. The biosensor assay was made with an electrochemical biosensor toxicity analyser with immobilised Photosystem II (PSII) complex. Using the PSII-biosensor assay, higher sensitivity (LOD) to herbicides (10(-8)-10(-9)M) was achieved as compared to standard algal growth inhibition tests (about 10(-7)M). The results of both assays showed a good correlation as concerns their EC50 values while the interval of detectable concentrations is about twice wider for PSII-biosensor. A proposed measurement protocol includes the reference standard of phytotoxicity (RSP). The main advantage of the PSII-biosensor assay is that it can be completed in about 1h and is by 1-2 orders more sensitive than standard algal growth inhibition test, which takes 72 h.
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Affiliation(s)
- Jiří Masojídek
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, CZ-37981 Třeboň, Czech Republic.
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Cai W, Liang A, Liu Q, Liao X, Jiang Z, Shang G. Catalytic effect of ReAu nanoalloy on the Te particle reaction and its application to resonance scattering spectral assay of CA125. LUMINESCENCE 2010; 26:305-12. [DOI: 10.1002/bio.1228] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 05/08/2010] [Accepted: 06/03/2010] [Indexed: 11/08/2022]
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28
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Del Carlo M, Compagnone D. Recent strategies for the biological sensing of pesticides: from the design to the application in real samples. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s12566-010-0012-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Shing WL, Surif S, Heng LY. Toxicity Biosensor for the Evaluation of Cadmium Toxicity Based on Photosynthetic Behavior of Cyanobacteria Anabaena torulosa. ACTA ACUST UNITED AC 2008. [DOI: 10.3923/ajb.2008.162.168] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Effects of the herbicide bentazon on growth and photosystem II maximum quantum yield of the marine diatom Skeletonema costatum. Toxicol In Vitro 2008; 22:716-22. [DOI: 10.1016/j.tiv.2007.11.012] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Revised: 11/14/2007] [Accepted: 11/15/2007] [Indexed: 11/21/2022]
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31
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Bengtson Nash SM, Quayle PA. Biomaterial culture conditions impacting the performance of a PAM fluorometry based aquatic phytotoxicity assay. Biosens Bioelectron 2007; 23:276-80. [PMID: 17521901 DOI: 10.1016/j.bios.2007.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2006] [Revised: 04/03/2007] [Accepted: 04/03/2007] [Indexed: 11/24/2022]
Abstract
An aquatic phytotoxicity assay, based on the principles of pulse amplitude modulated (PAM) fluorometry has recently been developed and validated under laboratory conditions. Characteristics of the assay include the use of photosynthesising biomaterial, most frequently whole organism microalgae. The instrument employs light probing measurements to monitor chlorophyll fluorescence signals emitted by the biomaterial component. These characteristics could leave assay performance susceptible to interference by minor variations in biomaterial treatment and culture conditions prior to testing. This study investigates assay performance in response to variations in two microalgae culture parameters; short-term light history (24h) prior to testing and the sterility of long-term culture conditions. Light history of the four microalgal species tested significantly impacted their toxicity response, as measured with the assay. Light treatments of 5 micromol photons m(-2)s(-1) produced the highest photosystem II quantum yields (Phi(II)) whilst higher light intensities resulted in an inverse relationship between Phi(II) and the measured toxicity response (inhibition (%) of photochemistry). Of the two microalgal cultures tested, sterility of culture conditions significantly impacted the performance of the green freshwater algae, Chlorella vulgaris as assay biomaterial. On average 1 microg L(-1) diuron inhibited photochemistry 2.6% less in axenically cultured C. vulgaris compared with non-axenically maintained cultures. This investigation series contributes valuable quality assurance data towards microalgal based PAM fluorometry assays and emphasises the importance of such investigations if new biorecognition systems are to be accredited and/or routinely incorporated for biomonitoring purposes.
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Affiliation(s)
- S M Bengtson Nash
- The National Research Centre for Environmental Toxicology (EnTOX), The University of Queensland (UQ), Coopers Plains, Qld, Australia.
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32
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Vernay P, Gauthier-Moussard C, Hitmi A. Interaction of bioaccumulation of heavy metal chromium with water relation, mineral nutrition and photosynthesis in developed leaves of Lolium perenne L. CHEMOSPHERE 2007; 68:1563-75. [PMID: 17434568 DOI: 10.1016/j.chemosphere.2007.02.052] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Revised: 02/03/2007] [Accepted: 02/25/2007] [Indexed: 05/14/2023]
Abstract
Contamination by chromium (Cr) is widespread in agricultural soils and industrial sites. This heavy metal represents a risk to human health. In order to gain fundamental insights into the nature of the adaptation to Cr excess, the characterisation of physiological indices, including responses of photosynthetic gas exchange and chlorophyll a fluorescence along with changes in mineral nutrient contents and water status were studied in ray grass (Lolium perenne L.). Increased concentrations of Cr(VI) (0-500 microM Cr) in the Coïc and Lessaint nutrient solution were applied. The growth of Lolium perenne is decreased by chromium and the leaves have lost their pigments. Chromium accumulation was greater in roots than in leaves and reached 2450 and 210 microg g(-1) DW, respectively with 500 microM Cr(VI) in nutrient medium. The physiological parameters were severely reduced by this heavy metal. Cr induced toxicity arising from 100 microM Cr(VI) and resulted in a modification of mineral content in roots and leaves, especially for Ca, Mg and Fe. The chromium stress decreased CO2 assimilation rates mainly due to stomatal closure, which reduced water loss by transpiration without decreasing the cellular available CO2. The fluorescence parameters associated with photosystem II (PSII) activity and the photochemical activity are modified by chromium. Non-radiative energy dissipation mechanisms were triggered during stress since non-photochemical quenching was increased and efficiency of excitation capture by open centers was reduced.
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Affiliation(s)
- Philippe Vernay
- Laboratoire de Physiologie et Biotechnologies Végétales, ERTAC EA 3296, Université Blaise Pascal/IUT de l'Université d'Auvergne, 100, Rue de l'Egalité, F-15000 Aurillac, France
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33
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Bettazzi F, Laschi S, Mascini M. One-shot screen-printed thylakoid membrane-based biosensor for the detection of photosynthetic inhibitors in discrete samples. Anal Chim Acta 2007; 589:14-21. [PMID: 17397647 DOI: 10.1016/j.aca.2007.02.062] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2006] [Revised: 02/21/2007] [Accepted: 02/21/2007] [Indexed: 11/22/2022]
Abstract
Screen-printing technology offers the possibility to produce a large number of sensors at low cost. Thus, due to their intrinsic characteristics and reproducibility, screen-printed electrodes can be used in the development of disposable electrochemical devices. In the present work, carbon-based screen-printed electrodes (SPCEs) have been used to develop a one-shot-measure biosensor for the detection of photosynthetic inhibitors in discrete samples. The measurement was based on the electrochemical evaluation of the activity of photosystem II (PSII), a protein complex present in photosynthetic organisms and involved in the photosynthesis. The biosensor was prepared by the modification of the working electrode of a SPCE, using thylakoid membranes extracted from spinach leaves. The modified sensors were then used as one-shot system to measure the presence of PSII activity inhibitors in discrete standard solutions. The coupling of the developed biosensor with a custom-made cell made it possible to perform tests using only 50 microL of total sample volume with a measurement time of 10 min. Inhibition curves were recorded for some photosynthetic inhibitors in a concentration range of 10(-6) to 10(-8) molL(-1). A reproducibility (relative standard deviation, R.S.D.%) of 10% was found and the calculated limit of detections (LODs) were in the nanomolar range. The effect of storage on sensitivity and reproducibility of a biosensor prepared by direct lyophilisation of thylakoid membranes on the electrode surface was also evaluated, confirming the possible use of the modified sensor up to one week after the preparation. Measurements on real samples were also reported, comparing the results with those obtained using a fluorescence-based commercial instrument for the analysis of photosynthetic inhibitors.
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Affiliation(s)
- Francesca Bettazzi
- Università degli Studi di Firenze, Dipartimento di Chimica, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
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34
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Nguyen-Ngoc H, Tran-Minh C. Fluorescent biosensor using whole cells in an inorganic translucent matrix. Anal Chim Acta 2007; 583:161-5. [PMID: 17386541 DOI: 10.1016/j.aca.2006.10.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2006] [Revised: 09/27/2006] [Accepted: 10/04/2006] [Indexed: 10/24/2022]
Abstract
An optical biosensor based on vegetal cells entrapped in an inorganic translucent matrix and fluorescence detection has been developed. The biosensor uses Chlorella vulgaris immobilized in a translucent support produced from sol-gel technology. The translucence of the structure enables the algal active layer to be placed directly in contact with the optical fibers for fluorescence detection. This configuration has many advantages over the use of an opaque support because no space between the optical fibers and the active layer is required to collect fluorescence. This reagentless biosensor allows determination of diuron as an anti-PSII herbicide and its long term activity is assessed.
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Affiliation(s)
- Hanh Nguyen-Ngoc
- University of Technology HCM, 268 rue Ly Thuong Kiet, Ho Chi Minh, Vietnam
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35
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Ventrella A, Catucci L, Villari V, Scolaro LM, Agostiano A. Focus on the aggregation processes of Photosystem II complexes. Bioelectrochemistry 2007; 70:33-8. [PMID: 16730478 DOI: 10.1016/j.bioelechem.2006.03.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Indexed: 11/18/2022]
Abstract
In this work the effect of temperature and n-dodecyl-beta-d-maltoside (DM) on PSII complexes organization was investigated. An aggregation process of PSII monomers and dimers was documented at different temperatures and low DM concentration by steady-state fluorescence, absorption, circular dichroism, Rayleigh and dynamic light-scattering experiments. Measures of oxygen evolution enabled us to estimate the change in photoactivity of PSII during the aggregation. This process was found to be extensively reversed by increasing DM concentration as proved by means of steady-state fluorescence and dynamic light-scattering experiments.
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Affiliation(s)
- A Ventrella
- Dipartimento di Chimica, Universita' di Bari, Via Orabona 4, 70126 Bari, Italy
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36
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Rodriguez-Mozaz S, Lopez de Alda MJ, Barceló D. Biosensors as useful tools for environmental analysis and monitoring. Anal Bioanal Chem 2006; 386:1025-41. [PMID: 16807703 DOI: 10.1007/s00216-006-0574-3] [Citation(s) in RCA: 195] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Revised: 04/23/2006] [Accepted: 05/22/2006] [Indexed: 10/24/2022]
Abstract
Recent advances in the development and application of biosensors for environmental analysis and monitoring are reviewed in this article. Several examples of biosensors developed for relevant environmental pollutants and parameters are briefly overviewed. Special attention is paid to the application of biosensors to real environmental samples, taking into consideration aspects such as sample pretreatment, matrix effects and validation of biosensor measurements. Current trends in biosensor development are also considered and commented on in this work. In this context, nanotechnology, miniaturisation, multi-sensor array development and, especially, biotechnology arise as fast-growing areas that will have a marked influence on the development of new biosensing strategies in the near future.
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Affiliation(s)
- Sara Rodriguez-Mozaz
- Department of Environmental Chemistry, IIQAB-CSIC, C/ Jordi Girona 18-26, 08034, Barcelona, Spain.
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37
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Bengtson Nash SM, Goddard J, Müller JF. Phytotoxicity of surface waters of the Thames and Brisbane River Estuaries: A combined chemical analysis and bioassay approach for the comparison of two systems. Biosens Bioelectron 2006; 21:2086-93. [PMID: 16314084 DOI: 10.1016/j.bios.2005.10.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Revised: 10/06/2005] [Accepted: 10/25/2005] [Indexed: 10/25/2022]
Abstract
The Thames Estuary, UK, and the Brisbane River, Australia, are comparable in size and catchment area. Both are representative of the large and growing number of the world's estuaries associated with major cities. Principle differences between the two systems relate to climate and human population pressures. In order to assess the potential phytotoxic impact of herbicide residues in the estuaries, surface waters were analysed with a PAM fluorometry-based bioassay that employs the photosynthetic efficiency (photosystem II quantum yield) of laboratory cultured microalgae, as an endpoint measure of phytotoxicity. In addition, surface waters were chemically analysed for a limited number of herbicides. Diuron, atrazine and simazine were detected in both systems at comparable concentrations. In contrast, bioassay results revealed that whilst detected herbicides accounted for the observed phytotoxicity of Brisbane River extracts with great accuracy, they consistently explained only around 50% of the phytotoxicity induced by Thames Estuary extracts. Unaccounted for phytotoxicity in Thames surface waters is indicative of unidentified phytotoxins. The greatest phytotoxic response was measured at Charing Cross, Thames Estuary, and corresponded to a diuron equivalent concentration of 180 ng L(-1). The study employs relative potencies (REP) of PSII impacting herbicides and demonstrates that chemical analysis alone is prone to omission of valuable information. Results of the study provide support for the incorporation of bioassays into routine monitoring programs where bioassay data may be used to predict and verify chemical contamination data, alert to unidentified compounds and provide the user with information regarding cumulative toxicity of complex mixtures.
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Affiliation(s)
- S M Bengtson Nash
- The National Research Centre for Environmental Toxicology (EnTOX), The University of Queensland (UQ), Coopers Plains, Qld, Australia.
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38
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Dementiev AA, Baikov AA, Ptushenko VV, Khomutov GB, Tikhonov AN. Biological and polymeric self-assembled hybrid systems: Structure and properties of thylakoid/polyelectrolyte complexes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2005; 1712:9-16. [PMID: 15869742 DOI: 10.1016/j.bbamem.2005.03.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2004] [Revised: 03/18/2005] [Accepted: 03/23/2005] [Indexed: 11/22/2022]
Abstract
A novel hybrid system composed of biological components and synthetic polymer, thylakoid/polycation complex, has been formed and studied. Effects of complex formation on the structure, electrostatics and functioning of thylakoid membranes have been examined. Thylakoids from bean leaves were used to form complexes with polycation polyallylamine hydrochloride (PAAH) in two systems: (i) thylakoid/polycation complexes formed in an aqueous bulk phase, and (ii) immobilized thylakoid/polycation planar complexes. Immobilized on a solid substrate surface, thylakoid/polycation complexes were prepared using layer-by-layer stepwise alternate adsorption technique, i.e., via the sequential alternate adsorption of thylakoids and polycation molecules. The morphology of built up structures was investigated by scanning electron microscopy. Light-induced electron transport in chloroplasts was studied by the electron paramagnetic resonance (EPR) method. Spin probe technique was employed to study the structural and electrostatic characteristics of thylakoid membranes. We have found that efficiency of light-induced electron transport in thylakoid membranes and membrane structure were not changed noticeably by PAAH binding to thylakoids in a wide range of PAAH concentrations. The data obtained indicate the physiologically-soft character of polycation interactions with thylakoid membranes and demonstrate effectiveness of interfacial self-assembly approach to fabrication of complex planar functional nanostructures from biological components and synthetic polymers.
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Affiliation(s)
- A A Dementiev
- Department of Biophysics, Faculty of Physics, M.V. Lomonosov Moscow State University, Russia
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Abstract
Photosynthetic proteins are a source of biological material well-suited to technological applications. They exhibit light-induced electron transfer across lipid membranes that can be exploited for the construction of photo-optical electrical devices. The structure and function of photosynthetic proteins differ across the photosynthetic evolutionary scale, allowing for their application in a range of technologies. Here we provide a general description of the basic and technical research in this sector and an overview of biochips and biosensors based on photochemical activity that have been developed for the bioassay of pollutants.
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Affiliation(s)
- Maria Teresa Giardi
- Institute of Crystallography, National Council of Research, Department of Molecular Design and Nanotechnology, Area of Research of Rome, Via Salaria Km 29.300, 00016 Monterotondo scalo Rome, Italy
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40
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Li J, Wei X, Peng T. Fabrication of Herbicide Biosensors Based on the Inhibition of Enzyme Activity That Catalyzes the Scavenging of Hydrogen Peroxide in a Thylakoid Membrane. ANAL SCI 2005; 21:1217-22. [PMID: 16270582 DOI: 10.2116/analsci.21.1217] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A novel herbicide biosensor with a thylakoid modified membrane electrode is presented. Thylakoid, isolated from spinach leaves, was entrapped in a membrane of poly (vinylalcohol) with the styrylpyridinium group (PVA-SbQ). The thylakoid membrane was fixed on the surface of a platinum electrode. It was found that the enzymes in thylakoid kept their activity for several months in the membrane. The oxidative current of hydrogen peroxide in a Tris-HCl buffer solution (pH 7.4) was detected at the modified electrode by a differential pulse voltammetric method. In the presence of herbicides, the oxidation current from the hydrogen peroxide decreased due to an inhibitor effect on the enzymes in thylakoid compared with that in the absence of the herbicides. The changes in the oxidation current at the electrode were proportional to the herbicide concentrations. The sensor could be used to detect herbicides in concentration ranges of 3 x 10(-9) - 1.5 x 10(-7) M for paraquat, 1 x 10(-8) - 3 x 10(-7) M for diuron, 4 x 10(-8) - 3 x 10(-6) M for prometryn, 5 x 10(-8) - 5 x 10(-6) M for atrazine and 1 x 10(-7) - 5 x 10(-6) M for ametryn, respectively. The enzyme activity on scavenging hydrogen peroxide in the modified PVA-SbQ membrane was examined.
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Affiliation(s)
- Jianping Li
- Department of Material and Chemistry Engineering, Guilin University of Technology, Guilin 541004, China.
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Védrine C, Leclerc JC, Durrieu C, Tran-Minh C. Optical whole-cell biosensor using Chlorella vulgaris designed for monitoring herbicides. Biosens Bioelectron 2003; 18:457-63. [PMID: 12604263 DOI: 10.1016/s0956-5663(02)00157-4] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An optical biosensor was designed for determination of herbicides as aquatic contaminants. Detection was obtained with immobilised Chlorella vulgaris microalgae entrapped on a quartz microfibre filter and placed in a five-membrane-home-made-flow cell. The algal chlorophyll fluorescence modified by the presence of herbicides was collected at the tip of an optical fibre bundle and sent to a fluorimeter. A continuous culture was set up to produce algal cells in reproducible conditions for measurement optimisation. Effects of flow rate, algal density, temperature, and pH on the biosensor response to atrazine were studied. Reversibility and detection limits were determined for DNOC and atrazine, simazine, isoproturon, diuron. Detection of photosystem II (PSII) herbicides was achieved at sub-ppb concentration level.
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Affiliation(s)
- Christophe Védrine
- Ecole Nationale Supérieure des Mines, SPIN/PC2M/Enzyme engineering, 158, Cours Fauriel, 42023 Saint-Etienne cedex 2, France
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