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Wang X, Wang WX. Cell cycle-dependent Cu uptake explained the heterogenous responses of Chlamydomonas to Cu exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 319:121013. [PMID: 36608730 DOI: 10.1016/j.envpol.2023.121013] [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: 09/01/2022] [Revised: 12/11/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Growing evidence suggested that microorganisms exhibited heterogeneous sensitivity to toxicants, but their underlying mechanisms remain largely unknown. The asynchronous cell cycle progression in natural population implies the connection between cell cycle and heterogeneity. Here, the heterogenous responses of Chlamydomonas reinhardtii upon Cu stress were confirmed with the aid of a fluorometric probe for imaging Cu(I), implying the connection with cell cycle. Our results further indicated that the increase of labile Cu(I) was related to the cell division, leading to the fluctuation of labile Cu(I) with diurnal cycle and cell cycle, respectively. However, lack of Cu mainly influenced the cell division. We demonstrated that G2/M phase was the critical stage requiring high Cu quota during cell division. Specifically, algae at G2/M phase required 10-fold of Cu quota compared with that at G1 phase, which was related to the mitochondrial replication. Eventually, the heterogeneous Cu uptake ability of algae at different cell phases led to the heterogeneous responses to Cu exposure. Overall, Cu could influence the cell cycle through mediating the cell division, and in turn algae at different cell phases exhibited different Cu sensitivities. This study firstly uncovered the underlying mechanisms of heterogeneous Cu sensitivity for phytoplankton, which could help to evaluate the potential ecological risks of Cu.
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Affiliation(s)
- Xiangrui Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Wen-Xiong Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China.
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Expósito N, Carafa R, Kumar V, Sierra J, Schuhmacher M, Papiol GG. Performance of Chlorella Vulgaris Exposed to Heavy Metal Mixtures: Linking Measured Endpoints and Mechanisms. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:1037. [PMID: 33503904 PMCID: PMC7908404 DOI: 10.3390/ijerph18031037] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 02/06/2023]
Abstract
Microalgae growth inhibition assays are candidates for referent ecotoxicology as a fundamental part of the strategy to reduce the use of fish and other animal models in aquatic toxicology. In the present work, the performance of Chlorella vulgaris exposed to heavy metals following standardized growth and photosynthesis inhibition assays was assessed in two different scenarios: (1) dilutions of single heavy metals and (2) an artificial mixture of heavy metals at similar levels as those found in natural rivers. Chemical speciation of heavy metals was estimated with Visual MINTEQ software; free heavy metal ion concentrations were used as input data, together with microalgae growth and photosynthesis inhibition, to compare different effects and explain possible toxicity mechanisms. The final goal was to assess the suitability of the ecotoxicological test based on the growth and photosynthesis inhibition of microalgae cultures, supported by mathematic models for regulatory and decision-making purposes. The C. vulgaris algae growth inhibition test was more sensitive for As, Zn, and Pb exposure whereas the photosynthesis inhibition test was more sensitive for Cu and Ni exposure. The effects on growth and photosynthesis were not related. C. vulgaris evidenced the formation of mucilaginous aggregations at lower copper concentrations. We found that the toxicity of a given heavy metal is not only determined by its chemical speciation; other chemical compounds (as nutrient loads) and biological interactions play an important role in the final toxicity. Predictive mixture effect models tend to overestimate the effects of metal mixtures in C. vulgaris for both growth and photosynthesis inhibition tests. Growth and photosynthesis inhibition tests give complementary information, and both are a fast, cheap, and sensitive alternative to animal testing. More research is needed to solve the challenge of complex pollutant mixtures as they are present in natural environments, where microalgae-based assays can be suitable monitoring tools for pollution management and regulatory purposes.
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Affiliation(s)
- Nora Expósito
- Environmental Engineering Laboratory, Chemical Engineering Department, Rovira i Virgili University, Av. Països Catalans 26, 43007 Tarragona, Spain; (N.E.); (R.C.); (M.S.); (G.G.P.)
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Rovira i Vir-gili University, Sant Llorenç 21, 43201 Reus, Spain;
| | - Roberta Carafa
- Environmental Engineering Laboratory, Chemical Engineering Department, Rovira i Virgili University, Av. Països Catalans 26, 43007 Tarragona, Spain; (N.E.); (R.C.); (M.S.); (G.G.P.)
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Rovira i Vir-gili University, Sant Llorenç 21, 43201 Reus, Spain;
| | - Vikas Kumar
- Environmental Engineering Laboratory, Chemical Engineering Department, Rovira i Virgili University, Av. Països Catalans 26, 43007 Tarragona, Spain; (N.E.); (R.C.); (M.S.); (G.G.P.)
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Rovira i Vir-gili University, Sant Llorenç 21, 43201 Reus, Spain;
| | - Jordi Sierra
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Rovira i Vir-gili University, Sant Llorenç 21, 43201 Reus, Spain;
- Faculty of Pharmacy, Barcelona University, Avda Joan XXIII s/n, 08028 Barcelona, Spain
| | - Marta Schuhmacher
- Environmental Engineering Laboratory, Chemical Engineering Department, Rovira i Virgili University, Av. Països Catalans 26, 43007 Tarragona, Spain; (N.E.); (R.C.); (M.S.); (G.G.P.)
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Rovira i Vir-gili University, Sant Llorenç 21, 43201 Reus, Spain;
| | - Gemma Giménez Papiol
- Environmental Engineering Laboratory, Chemical Engineering Department, Rovira i Virgili University, Av. Països Catalans 26, 43007 Tarragona, Spain; (N.E.); (R.C.); (M.S.); (G.G.P.)
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Rovira i Vir-gili University, Sant Llorenç 21, 43201 Reus, Spain;
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Grajek H, Rydzyński D, Piotrowicz-Cieślak A, Herman A, Maciejczyk M, Wieczorek Z. Cadmium ion-chlorophyll interaction - Examination of spectral properties and structure of the cadmium-chlorophyll complex and their relevance to photosynthesis inhibition. CHEMOSPHERE 2020; 261:127434. [PMID: 32717505 DOI: 10.1016/j.chemosphere.2020.127434] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 06/03/2020] [Accepted: 06/14/2020] [Indexed: 06/11/2023]
Abstract
Chlorophyll was shown to spontaneously form a complex with cadmium, which is incorporated at the central position of the chlorophyll molecule porphyrin ring, where it replaces magnesium. The rate of complex formation depended on the ratio of Cd2+ ions to chlorophyll concentration in the solution. In solutions with chlorophyll concentration of C = 1 × 10-5 M and Cd2+ concentrations of C = 1 × 10-5 M, C = 1 × 10-3 M and C = 9 × 10-3 M, Cd-Chl complex formation was completed after 200 h, 50 h and 33 h, respectively. The formation of Cd-Chl complex followed the second order over all substrates reaction order, first order over Cd2+ concentration and first over Chl concentration. The pseudo second order reaction rate constant k, when Cd2+ concentration was equal Chl concentration have been obtained as k = 1.510 ± 0.023 × 10-4 M-1min-1. Quantum chemistry computations showed that Cd-chlorophyll complex existed in two conformations in the methanol solution with cadmium ion placed either below or above the coordination plane. Two times smaller overlap integral of the Chl fluorescence spectrum with the Cd-Chl absorption spectrum IChl,Cd-Chl= 2.4223 × 10-13 cm3/M in comparison with the overlap integral of the Chl fluorescence spectrum with the Chl absorption spectrum IChl,Chl= 4.6210 × 10-13 cm3/M (twice lower probability of energy transfer Chl∗ → Cd-Chl than Chl∗ → Chl) and lower Förster critical distance for resonance energy transfer: RoChl→Cd-Chl= 46.773 Å, RoChl→Chl= 52.086 Å, indicated that in plants intoxicated with cadmium, taken up from the contaminated soil, the energy transfer between Chl and Cd-Chl in antennas will be disturbed, which may be one of the reasons for the inhibition of photosynthesis.
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Affiliation(s)
- Hanna Grajek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719, Olsztyn, Poland.
| | - Dariusz Rydzyński
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719, Olsztyn, Poland; Department of Plant Physiology, Genetics and Biotechnology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-718, Olsztyn, Poland
| | - Agnieszka Piotrowicz-Cieślak
- Department of Plant Physiology, Genetics and Biotechnology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-718, Olsztyn, Poland
| | - Aleksander Herman
- Gdańsk University of Technology, Department of Inorganic Chemistry, Narutowicza St. 11/12, 80-233, Gdańsk, Poland
| | - Maciej Maciejczyk
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719, Olsztyn, Poland
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719, Olsztyn, Poland
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Fourati E, Vogel-Mikuš K, Wali M, Kavčič A, Gomilšek JP, Kodre A, Kelemen M, Vavpetič P, Pelicon P, Abdelly C, Ghnaya T. Nickel tolerance and toxicity mechanisms in the halophyte Sesuvium portulacastrum L. as revealed by Ni localization and ligand environment studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:23402-23410. [PMID: 31119536 DOI: 10.1007/s11356-019-05209-8] [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: 10/29/2018] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
Halophytes are able to tolerate relatively high concentrations of hazardous metals in a growing substrate, what makes them suitable candidates for phytoremediation of metal-contaminated soils. In this work, we aimed to study the physiological responses of the halophyte Sesuvium portulacastrum L. to Ni, with main focus on Ni localization, compartmentation and ligand environment, to decipher Ni tolerance and toxicity mechanisms. Seedlings were grown in hydroponic nutrient solution containing 0, 25, 50 and 100 μM Ni as NiCl2 for 3 weeks. Ni localization in leaves was assessed by micro-proton-induced X-ray emission (micro-PIXE). Ni ligand environment was studied by Ni K-edge X-ray absorption near edge structure (XANES). In addition, Ni-soluble, weakly bound/exchangeable and insoluble leaf tissue fractions were determined by sequential extraction. Results show that S. portulacastrum is able to tolerate up to ~ 500 μg g-1 dry weight (DW) of Ni in the shoots without significant growth reduction. At higher Ni concentrations (> 50 μM Ni in nutrient solution), chloroses were observed due to the accumulation of Ni in photosynthetically active chlorenchyma as revealed by micro-PIXE. Water storage tissue represented the main pool for Ni storage. Incorporation of Ni into Ca-oxalate crystals was also observed in some specimens, conferring tolerance to high leaf Ni concentrations. The majority of Ni (> 70%) was found in soluble tissue fraction. Ni K XANES revealed Ni bound mainly to O- (55%) and N-ligands (45%). Ni toxicity at higher Ni levels was associated with Ni binding to amino groups of proteins in cytosol of chlorenchyma and increased level of lipid peroxidation. Proline levels also increased at high Ni exposures and were associated with Ni-induced oxidative stress and alteration of water regime.
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Affiliation(s)
- Emna Fourati
- Faculty of Sciences Tunis, Campus Universitaire Tunis - El Manar, 2092, Tunis, Tunisia
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Mariem Wali
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia
| | - Anja Kavčič
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
| | - Jana Padežnik Gomilšek
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000, Maribor, Slovenia
| | - Alojz Kodre
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
- Faculty for Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000, Ljubljana, Slovenia
| | - Mitja Kelemen
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Chedly Abdelly
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia
| | - Tahar Ghnaya
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia.
- Higher Institute of Sciences and Techniques of Waters, University of Gabes, Erriadh City Campus - 6072 Zirig, Gabes, Tunisia.
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Roubeau Dumont E, Larue C, Michel HC, Gryta H, Liné C, Baqué D, Maria Gross E, Elger A. Genotypes of the aquatic plant Myriophyllum spicatum with different growth strategies show contrasting sensitivities to copper contamination. CHEMOSPHERE 2020; 245:125552. [PMID: 31846788 DOI: 10.1016/j.chemosphere.2019.125552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 11/16/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
Genotypic variability has been considered for years as a key attribute in species adaptation to new environments. It has been extensively studied in a context of chemical resistance, but remains poorly studied in response to chemical exposure in a context of global change. As aquatic ecosystems are particularly affected by environmental changes, we aimed to study how genotypic variability could inflect the sensitivity of aquatic plants to chemicals. Seven genotypes of Myriophyllum spicatum were exposed to three copper concentrations at 0, 0.15 and 0.5 mg/L. The sensitivity of the different genotypes was assessed through several endpoints such as relative growth rate (RGR) and morphological traits, as well as physiological markers, such as plant biomacromolecular composition. Our results showed that genotypes exhibited significant differences in their life-history traits in absence of chemical contamination. Some trait syndromes were observed, and three growth strategies were identified: (1) biomass production and main shoot elongation, (2) dry matter storage with denser whorls to promote resource conservation and (3) lateral shoot production. An up to eightfold difference in sensitivity for growth-related endpoints was observed among genotypes. Differences in sensitivity were partly attributed to morphological life-history traits. Our results confirm that genotypic variability can significantly affect M. spicatum sensitivity to Cu, and may influence the outcomes of laboratory testing based on the study of one single genotype. We recommend including genotypic variation as an assessment factor in ecological risk assessment and to study this source of variability more in depth as a possible driver of ecosystem resilience.
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Affiliation(s)
| | - Camille Larue
- EcoLab, Université de Toulouse, CNRS, Toulouse, France
| | - Hiram Castillo Michel
- Beamline ID21, ESRF-The European Synchrotron, CS40220, 38043, Grenoble Cedex 9, France
| | - Hervé Gryta
- Laboratoire Evolution & Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, IRD, UPS, 118 route de Narbonne, Bat 4R1, 31062, Toulouse, France
| | - Clarisse Liné
- EcoLab, Université de Toulouse, CNRS, Toulouse, France; CIRIMAT, UMR CNRS 5085/LCMI, Université Paul-Sabatier, F 31062, Toulouse Cedex 4, France
| | - David Baqué
- EcoLab, Université de Toulouse, CNRS, Toulouse, France
| | | | - Arnaud Elger
- EcoLab, Université de Toulouse, CNRS, Toulouse, France
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Loustau E, Ferriol J, Koteiche S, Gerlin L, Leflaive J, Moulin F, Girbal-Neuhauser E, Rols JL. Physiological responses of three mono-species phototrophic biofilms exposed to copper and zinc. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:35107-35120. [PMID: 31679142 DOI: 10.1007/s11356-019-06560-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 09/23/2019] [Indexed: 06/10/2023]
Abstract
In freshwater ecosystem, phototrophic biofilms play a crucial role through adsorption and sequestration of organic and inorganic pollutants. However, extracellular polymeric substance (EPS) secretion by phototrophic biofilms exposed to metals is poorly documented. This work evaluated the physiological responses of phototrophic biofilms by exposing three microorganisms (cyanobacterium Phormidium autumnale, diatom Nitzschia palea and green alga Uronema confervicolum) to 20 and 200 μg L-1 of Cu or 60 and 600 μg L-1 of Zn, both individually and in combination. Analysis of metal effects on algal biomass and photosynthetic efficiency showed that metals were toxic at higher concentrations for these two parameters together and that all the strains were more sensitive to Cu than to Zn. U. confervicolum was the most impacted in terms of growth, while P. autumnale was the most impacted in terms of photosynthetic efficiency. In consequence to metal exposure at higher concentrations (Cu200, Zn600 and Cu200Zn600), a higher EPS production was measured in diatom and cyanobacterium biofilms, essentially caused by an overproduction of protein-like polymers. On the other hand, the amount of secreted polysaccharides decreased during metal exposure of the diatom and green alga biofilms. Size exclusion chromatography revealed specific EPS molecular fingerprints in P. autumnale and N. palea biofilms that have secreted different protein-like polymers during their development in the presence of Zn600. These proteins were not detected in the presence of Cu200 despite an increase of proteins in the EPS extracts compared to the control. These results highlight interesting divergent responses between the three mono-species biofilms and suggest that increasing protein production in EPS biofilms may be a fingerprint of natural biofilm against metal pollutants in freshwater rivers.
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Affiliation(s)
- Emilie Loustau
- EcoLab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
- LBAE, Université de Toulouse, UPS, Auch, France
| | - Jessica Ferriol
- EcoLab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Shams Koteiche
- EcoLab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Léo Gerlin
- EcoLab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | | | - Frédéric Moulin
- IMFT, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | | | - Jean-Luc Rols
- EcoLab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France.
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Hou J, Li T, Miao L, You G, Xu Y, Liu S. Effects of titanium dioxide nanoparticles on algal and bacterial communities in periphytic biofilms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 251:407-414. [PMID: 31103000 DOI: 10.1016/j.envpol.2019.04.136] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/25/2019] [Accepted: 04/29/2019] [Indexed: 06/09/2023]
Abstract
The widespread application of commercial TiO2 NPs inevitably leads to their release into environmental waters through various ways. TiO2 NPs released into water might be absorbed by and react with periphytic biofilms, which are a kind of aquatic environmental media of important ecological significance, and influence the physiological activity and ecological function of periphytic biofilms. This study investigated the effects of exposure to 1 mg/L and 5 mg/L of TiO2 NPs on periphytic biofilms cultured indoors. After a 10-day exposure to TiO2 NPs, the growth (measured by chlorophyll-a content) of microalgal community was inhibited greatly (more than 60%); however, the primary production (indicated by quantum yield) of periphytic biofilms maintained changeless. As for bacteria, TiO2 NP-exposure increased the bacterial diversity and altered the composition structure. Significant changes were observed in the bacterial communities at the class level, mainly including Alphaproteobacteria, Gammaproteobacteria, Cytophagia, Flavobacteriia, Sphingobacteriia, Synechococcophycideae and Oscillatoriophycideae. The enhancement of metabolic activities (the production of extracellular polymeric substances, especially proteins content increased by 48.51%) of periphytic biofilms was a resistance mechanism to toxicity of NPs. As for extracellular enzyme activities of periphytic biofilms, alkaline phosphatase activity was inhibited (22.43%) after exposed to 5 mg/L of TiO2 NPs, which posed a threat to phosphorus metabolism of periphytic biofilms. Overall, this study demonstrated that 1 mg/L and 5 mg/L of TiO2 NPs negatively influenced physiological activities and ecological functions of periphytic biofilms, highlighting that the ecological risks of TiO2 NPs should be paid attention to.
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Affiliation(s)
- Jun Hou
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Tengfei Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Lingzhan Miao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.
| | - Gouxiang You
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Yi Xu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Songqi Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
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Lee H, Choe E. Contribution of minor compounds present in the peppermint ( Mentha piperita) to the iron-catalyzed lipid oxidation of soybean oil-in-water emulsion. Food Sci Biotechnol 2018; 27:1319-1325. [PMID: 30319840 PMCID: PMC6170264 DOI: 10.1007/s10068-018-0386-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/06/2018] [Accepted: 04/16/2018] [Indexed: 10/16/2022] Open
Abstract
This study evaluated contribution of minor compounds naturally present in peppermint (Mentha piperita) to the iron-catalyzed lipid oxidation of oil-in-water emulsion. Emulsions consisted of tocopherol-stripped soybean oil and pH 4.0 citrate buffer (4:6, w/w) with iron. Minor compounds included α-tocopherol, rosmarinic acid, caffeic acid, β-carotene, and chlorophyll b at natural concentration in 400 ppm of the peppermint extract. The emulsions were oxidized in the dark, and headspace oxygen contents, hydroperoxide contents, and p-anisidine values were determined. Addition of phenolic compounds decreased headspace oxygen consumption and hydroperoxide and p-anisidine values of emulsions, however, β-carotene or chlorophyll b tended to increase them. The results suggest that tocopherols at low concentration were the most important to reduce lipid oxidation of emulsions via radical scavenging, followed by high contents of polyphenols via radical scavenging and iron-chelation. Carotenoids and chlorophylls should be precisely controlled even in the dark, possibly due to their oxidation products.
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Affiliation(s)
- Haein Lee
- Department of Food and Nutrition, Inha University, 100 Inha-ro, Namku, Incheon, 22212 Korea
| | - Eunok Choe
- Department of Food and Nutrition, Inha University, 100 Inha-ro, Namku, Incheon, 22212 Korea
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9
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DFT and TD-DFT Studies of Mg-Substitution in Chlorophyll by Cr(II), Fe(II) and Ni(II). CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s42250-018-0003-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Li K, Qian J, Wang P, Wang C, Liu J, Tian X, Lu B, Shen M. Crystalline phase-dependent eco-toxicity of titania nanoparticles to freshwater biofilms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:1433-1441. [PMID: 28917816 DOI: 10.1016/j.envpol.2017.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 08/13/2017] [Accepted: 09/04/2017] [Indexed: 06/07/2023]
Abstract
The potential toxic impacts of different crystal phases of titania nanoparticles (TNPs) on freshwater biofilms, especially under ultraviolet C irradiation (UVC), are unknown. Here, adverse impacts of three phases (anatase, rutile, and P25, 50 mg L-1 respectively) with UVC irradiation (An-UV, Ru-UV, and P25-UV) on freshwater biofilms were conducted. Characterization experiments revealed that rutile TNPs had a higher water environment stability than anatase and P25 TNPs, possessing a stronger photocatalytic activity under UVC irradiation. Phase-dependent inhibition of cell viability and significant decreases of four- and five-fold in algal biomass at 12 h of exposure were observed compared with unexposed biofilms. Moreover, phase-dependent oxidative stress resulted in remarkably significant reductions (P < 0.01) of the photosynthetic yields of the biofilms, to 40.32% (P25-UV), 48.39% (An-UV), and 46.77% (Ru-UV) of the plateau value obtained in the unexposed biofilms. A shift in community composition that manifested as a strong reduction in diatoms, indicating cyanobacteria and green algae were more tolerant than diatoms when exposed to TNPs. In terms of the toxic mechanisms, rutile TNPs resulted in apoptosis by inducing excessive intracellular reactive oxygen species (ROS) production, whereas P25 and anatase TNPs tended to catalyze enormous acellular ROS lead to cell necrosis under UVC irradiation.
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Affiliation(s)
- Kun Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Jin Qian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Jingjing Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Xin Tian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Bianhe Lu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Mengmeng Shen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
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11
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Ngamwonglumlert L, Devahastin S, Chiewchan N. Molecular structure, stability and cytotoxicity of natural green colorants produced from Centella asiatica L. leaves treated by steaming and metal complexations. Food Chem 2017; 232:387-394. [PMID: 28490089 DOI: 10.1016/j.foodchem.2017.04.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 03/28/2017] [Accepted: 04/04/2017] [Indexed: 10/19/2022]
Abstract
Stability of extracts from Centella asiatica L. leaves treated by steaming and metal-chlorophylls complexations against combined acid-heat was compared with that from untreated leaves and synthetic colorant. Formation of metal-chlorophylls complexes was confirmed by FTIR spectroscopy. Molecular structure changes during stability test and cytotoxicity of the extracts against Vero cells were evaluated. Utilization of the extracts as colorant was also assessed in selected beverage ingredient and food. Copper-chlorophylls extracts exhibited similar green hue to those from untreated and steamed leaves, while zinc-chlorophylls extracts exhibited yellow-green color. Metal-chlorophylls extracts possessed higher stability against combined acid-heat than those from untreated and steamed leaves. Use of metal-chlorophylls extracts in beverage ingredient led to increased hue value due to their structural rearrangement, which was confirmed by changes in Q band of VIS spectra. Cytotoxicity of zinc- and copper-chlorophylls extracts was slightly different and higher than those of extracts from untreated/steamed leaves and synthetic colorant.
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Affiliation(s)
- Luxsika Ngamwonglumlert
- Advanced Food Processing Research Laboratory, Department of Food Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha u-tid Road, Tungkru, Bangkok 10140, Thailand.
| | - Sakamon Devahastin
- Advanced Food Processing Research Laboratory, Department of Food Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha u-tid Road, Tungkru, Bangkok 10140, Thailand.
| | - Naphaporn Chiewchan
- Advanced Food Processing Research Laboratory, Department of Food Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha u-tid Road, Tungkru, Bangkok 10140, Thailand.
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12
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Bechaieb R, Ben Akacha A, Gérard H. Quantum chemistry insight into Mg-substitution in chlorophyll by toxic heavy metals: Cd, Hg and Pb. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.09.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Xu Y, Wang C, Hou J, Dai S, Wang P, Miao L, Lv B, Yang Y, You G. Effects of ZnO nanoparticles and Zn(2+) on fluvial biofilms and the related toxicity mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 544:230-237. [PMID: 26657369 DOI: 10.1016/j.scitotenv.2015.11.130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 11/24/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
Zinc oxide nanoparticles (ZnO NPs) used in consumer products are largely released into the environment through the wastewater stream. The health hazard of ZnO NPs and the contribution of dissolved Zn(2+) in toxicity of ZnO NPs has attracted extensive worldwide attention. In this study, the toxic effects of ZnO nanoparticles (ZnO NPs) and the effects of dissolved Zn(2+) on fluvial biofilms were investigated. At the end of the exposure time (21 days), scanning electron microscopy (SEM) images and bioaccumulation experiments revealed that large quantities of ZnO NPs were adsorbed on the biofilm. The algal biomasses were significantly decreased by six- and eleven-fold compared with the control (1.43 μg/L) by exposure to concentrations of 100mg/L ZnO NPs and 7.85 mg/L Zn(2+), respectively. Moreover, under the same exposure conditions, the quantum yields presented contents of 53.33 and 33.33% relative to the control, and a shift in the community composition that manifested as a strong reduction in diatoms was observed from 7 days and reached 15.63 and 6.25% of the control after 21 days of exposure, respectively. The reductions in bacteria viability and reactive oxygen species (ROS) production were noticeably enhanced following exposure to 100mg/L ZnO NPs and 7.85 mg/L Zn(2+), respectively. Additionally, the acute and rapid toxicity of Zn(2+) and the increasing toxicity of the ZnO NPs with increased bioaccumulation were noted in the exposure experiment.
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Affiliation(s)
- Yi Xu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Jun Hou
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Shanshan Dai
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Lingzhan Miao
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Bowen Lv
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Yangyang Yang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Guoxiang You
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, People's Republic of China; College of Environment, Hohai University, Nanjing 210098, People's Republic of China
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14
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Bechaieb R, Fredj AB, Akacha AB, Gérard H. Interactions of copper(ii) and zinc(ii) with chlorophyll: insights from density functional theory studies. NEW J CHEM 2016. [DOI: 10.1039/c5nj03244j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The most favored reaction of chlorophyll is computed to be substitution for Cu2+ and peripheral chelation for Zn2+.
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Affiliation(s)
- Rim Bechaieb
- Université de Tunis el Manar
- Faculté des Science de Tunis
- Laboratoire de Spectroscopie Atomique
- Moléculaire et Applications -LSAMA
- 1060 Tunis
| | - Arij B. Fredj
- Université de Tunis el Manar
- Faculté des Science de Tunis
- Laboratoire de Spectroscopie Atomique
- Moléculaire et Applications -LSAMA
- 1060 Tunis
| | - Azaiez B. Akacha
- Université de Tunis el Manar
- Faculté des Sciences de Tunis
- Département de chimie
- Laboratoire de Synthèse Organique et Hétérocyclique
- 2092 Tunis
| | - Hélène Gérard
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7616
- Laboratoire de Chimie Théorique
- Paris
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