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Banerjee M, Kalwani P, Chakravarty D, Pathak P, Agarwal R, Ballal A. Modulation of oxidative stress machinery determines the contrasting ability of cyanobacteria to adapt to Se(VI) or Se(IV). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 211:108673. [PMID: 38733937 DOI: 10.1016/j.plaphy.2024.108673] [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: 03/12/2024] [Revised: 04/23/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024]
Abstract
Excess of selenium (Se) in aquatic ecosystems has necessitated thorough investigations into the effects/consequences of this metalloid on the autochthonous organisms exposed to it. The molecular details of Se-mediated adaptive response remain unknown in cyanobacteria. This study aims to uncover the molecular mechanisms driving the divergent physiological responses of cyanobacteria on exposure to selenate [Se(VI)] or selenite [Se(IV)], the two major water-soluble oxyanions of Se. The cyanobacterium, Anabaena PCC 7120, withstood 0.4 mM of Se(VI), whereas even 0.1 mM of Se(IV) was detrimental, affecting photosynthesis and enhancing endogenous ROS. Surprisingly, Anabaena pre-treated with Se(VI), but not Se(IV), showed increased tolerance to oxidative stress mediated by H2O2/methyl viologen. RNA-Seq analysis showed Se(VI) to elevate transcription of genes encoding anti-oxidant proteins and Fe-S cluster biogenesis, whereas the photosynthesis-associated genes, which were mainly downregulated by Se(IV), remained unaffected. Specifically, the content of typical 2-Cys-Prx (Alr4641), a redox-maintaining protein in Anabaena, was elevated with Se(VI). In comparison to the wild-type, the Anabaena strain over-expressing the Alr4641 protein (An4641+) showed enhanced tolerance to Se(VI) stress, whereas the corresponding knockdown-strain (KD4641) was sensitive to this stressor. Incidentally, among these strains, only An4641+ was better protected from the ROS-mediated damage caused by high dose of Se(VI). These results suggest that altering the content of the antioxidant protein 2-Cys-Prx, could be a potential strategy for modulating resistance to selenate. Thus, involvement of oxidative stress machinery appears to be the major determinant, responsible for the contrasting physiological differences observed in response to selenate/selenite in cyanobacteria.
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Affiliation(s)
- Manisha Banerjee
- Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai-400085, India; Homi Bhabha National Institute, Mumbai-400094, India.
| | - Prakash Kalwani
- Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Dhiman Chakravarty
- Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Priyanka Pathak
- Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai-400085, India; Homi Bhabha National Institute, Mumbai-400094, India
| | - Rachna Agarwal
- Applied Genomics Section, Bhabha Atomic Research Centre, Mumbai-400085, India; Homi Bhabha National Institute, Mumbai-400094, India
| | - Anand Ballal
- Molecular Biology Division, Bhabha Atomic Research Centre, Mumbai-400085, India; Homi Bhabha National Institute, Mumbai-400094, India.
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2
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Kadri MS, Singhania RR, Haldar D, Patel AK, Bhatia SK, Saratale G, Parameswaran B, Chang JS. Advances in Algomics technology: Application in wastewater treatment and biofuel production. BIORESOURCE TECHNOLOGY 2023; 387:129636. [PMID: 37544548 DOI: 10.1016/j.biortech.2023.129636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/31/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
Advanced sustainable bioremediation is gaining importance with rising global pollution. This review examines microalgae's potential for sustainable bioremediation and process enhancement using multi-omics approaches. Recently, microalgae-bacterial consortia have emerged for synergistic nutrient removal, allowing complex metabolite exchanges. Advanced bioremediation requires effective consortium design or pure culture based on the treatment stage and specific roles. The strain potential must be screened using modern omics approaches aligning wastewater composition. The review highlights crucial research gaps in microalgal bioremediation. It discusses multi-omics advantages for understanding microalgal fitness concerning wastewater composition and facilitating the design of microalgal consortia based on bioremediation skills. Metagenomics enables strain identification, thereby monitoring microbial dynamics during the treatment process. Transcriptomics and metabolomics encourage the algal cell response toward nutrients and pollutants in wastewater. Multi-omics role is also summarized for product enhancement to make algal treatment sustainable and fit for sustainable development goals and growing circular bioeconomy scenario.
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Affiliation(s)
- Mohammad Sibtain Kadri
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung City 804201, Taiwan
| | - Reeta Rani Singhania
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India
| | - Dibyajyoti Haldar
- Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore 641114, India
| | - Anil Kumar Patel
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India.
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 805029, Republic of Korea
| | - Ganesh Saratale
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si 10326, Republic of Korea
| | - Binod Parameswaran
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng Kung University, Taiwan; Department of Chemical and Materials Engineering, Tunghai University, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taiwan.
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3
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Singh P, Singh S, Maurya P, Mohanta A, Dubey H, Khadim SR, Singh AK, Pandey AK, Singh AK, Asthana RK. Bioaccumulation of selenium in halotolerant microalga Dunaliella salina and its impact on photosynthesis, reactive oxygen species, antioxidative enzymes, and neutral lipids. MARINE POLLUTION BULLETIN 2023; 190:114842. [PMID: 36965269 DOI: 10.1016/j.marpolbul.2023.114842] [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: 12/20/2022] [Revised: 03/10/2023] [Accepted: 03/14/2023] [Indexed: 06/18/2023]
Abstract
Selenium (Se) is an essential element for living systems, however, toxic at higher levels. In the present study, Dunaliella salina cells were exposed to different Se concentrations for their growth (EC50 195 mg L-1) as well as Se accumulation. The cells exposed to 50 mg L-1 Se showed photoautotrophic growth parallel to control and accumulated 65 μg Se g-1 DW. A decrease in photosynthetic quantum yield, chlorophyll content, and the increase in intracellular reactive oxygen species, proline content, and lipid peroxidation accompanied by higher neutral lipid accumulation, were recorded at higher Se level. The enzymes superoxide dismutase and catalase played a pivotal role in antioxidative defense. Heterogeneity in accumulated carotenoids at varying concentrations of selenium was prevalent. The cells exposed to 200 mg L-1 Se resulted in the disorganization of organelles. Thus, the Se enriched biomass obtained at 50 mg L-1 may be explored for bio-fortification of food and feed.
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Affiliation(s)
- Prabhakar Singh
- Biochemistry Department, North Eastern Hill University, Shillong 793022, India
| | - Sakshi Singh
- Interdisciplinary School of Life Sciences, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Priyanka Maurya
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221005, India
| | - Abhishek Mohanta
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221005, India
| | - Hardik Dubey
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221005, India
| | - Sk Riyazat Khadim
- Department of Botany, Model Degree College, Nabarangpur, Odisha 764063, India
| | - Ankit K Singh
- Department of Botany, Marwari College (a Constituent Unit of Lalit Narayan Mithila University), Darbhanga 846004, India
| | - Adarsh K Pandey
- Sophisticated Analytical and Technical Help Institute (SATHI), Banaras Hindu University, Varanasi 221005, India
| | - Arvind K Singh
- Biochemistry Department, North Eastern Hill University, Shillong 793022, India
| | - Ravi K Asthana
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221005, India.
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4
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Se-enrichment of Chlorella vulgaris grown under different trophic states for food supplementation. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Guimarães BO, Villarreal-Toribio B, García-Barrera T, Arias-Borrego A, Gremmen P, Wijffels RH, Barbosa MJ, D'Adamo S. Effect of sulphur on selenium accumulation and speciation in Nannochloropsis oceanica. J Funct Foods 2022. [DOI: 10.1016/j.jff.2022.105215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022] Open
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6
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O. Guimarães B, de Boer K, Gremmen P, Drinkwaard A, Wieggers R, H. Wijffels R, J. Barbosa M, D'Adamo S. Selenium enrichment in the marine microalga Nannochloropsis oceanica. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102427] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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7
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Zhou C, Huang JC, Gan X, He S, Zhou W. Selenium uptake, volatilization, and transformation by the cyanobacterium Microcystis aeruginosa and post-treatment of Se-laden biomass. CHEMOSPHERE 2021; 280:130593. [PMID: 33932907 DOI: 10.1016/j.chemosphere.2021.130593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/13/2021] [Accepted: 04/14/2021] [Indexed: 06/12/2023]
Abstract
With a narrow margin between beneficial and toxic effects, selenium (Se) is of great concern due to its increasing level in aquatic environments. The accumulation and transformation of Se by the cyanobacterium Microcystis aeruginosa and effects of nutrients, particularly sulfate, were investigated. The nutrient-deprived cyanobacterium removed water-borne selenate (82.2 ± 0.93%) faster than selenite (58.9 ± 1.77%), with 86.0 ± 1.41% and 77.2 ± 1.00%, respectively, of the Se accumulated in the biomass and the rest volatilized. When supplied with excess nutrients, the Se accumulation and volatilization rates were significantly inhibited, with the removal efficiency dropping to 50.2 ± 2.59% and 7.37 ± 0.93% for selenite and selenate, respectively. When M. aeruginosa was tested with inadequate, appropriate, and adequate levels of sulfate, Se uptake decreased with increasing sulfate concentrations, particularly for selenate (from 34.1 to 4.81%). Using X-ray absorption near-edge structure to speciate biomass Se, selenite and selenate were transformed to organo-Se (87.3-100%), with or without nutrients present, suggesting M. aeruginosa could efficiently reduce Se oxyanions to more bioavailable forms. With increasing sulfate levels (5.0 and 10.0 mg S/L), percentages of SeMet converted from selenite decreased by 28.2-33.0%, with 19.1-33.2% as elemental Se, while organo-Se remained dominant (93.6-95.1%) in selenate-treated M. aeruginosa. Transmission electron microscopy shows structural damage in the cell wall at exposure to selenite (1600 μg Se/L), with the intracellular structure intact. To prevent Se biomagnification along aquatic food chains, the Se-laden biomass was combusted as a post-treatment, leading to a significant reduction in Se content (∼99.2%) and Se bioavailability, with inorganic Se (45.0-70.5%) predominant in the residue.
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Affiliation(s)
- Chuanqi Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jung-Chen Huang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Department of Environmental Engineering, National Cheng Kung University, Tainan City, 701, Taiwan.
| | - Xinyu Gan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Shengbing He
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Weili Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
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Long-Term Cultivation of a Native Arthrospira platensis (Spirulina) Strain in Pozo Izquierdo (Gran Canaria, Spain): Technical Evidence for a Viable Production of Food-Grade Biomass. Processes (Basel) 2021. [DOI: 10.3390/pr9081333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Microalgae cultivation is a promising alternative to traditional agriculture in arid—semi-arid areas. The aim of this study is to assess the viability of long-term cultivation of native Arthrospira platensis in Gran Canaria. Maximum culture productivity (0.08 g/L/day) and optimal concentration range (0.6–0.9 g/L) were firstly determined in 8000 L raceway under a greenhouse. Afterwards, a stable productivity of 0.06 g/L/day (6.0 g/m2/day) was obtained by reusing the culture medium during 26 days of cultivation, with consistent biomass biochemical composition. Outdoor temperature and daily solar irradiation ranged between 17.9–30.7 °C and 79.2–274.8 W/m2, while culture pH and salinity were in the range 9.42–10.77 and 11.2–14.9 g/L, respectively. Protein (>60%), potassium (1.8 g/100 g) and C-phycocyanin (7.2%) content is in the high-range of commercial Spirulina, which makes BEA 1257B promising for food and extraction of natural pigments/antioxidants. The dried biomass complies with international standards for human consumption, because of low heavy metal content and no pathogens presence. Product quality can be improved by reducing ash (≃12%) and sodium (1.5%) content through biomass washing optimization and/or further dewatering step. Other microorganisms can be prevented by high alkaline conditions and mild chemical treatments. These results pave the way for a sustainable microalgae-based blue bioeconomy in the Canary Islands.
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9
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Scaling-Up and Semi-Continuous Cultivation of Locally Isolated Marine Microalgae Tetraselmis striata in the Subtropical Island of Gran Canaria (Canary Islands, Spain). Processes (Basel) 2021. [DOI: 10.3390/pr9081326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The goal of this study was to determine the feasibility of the large-scale cultivation of locally isolated Tetraselmis striata in different open ponds in Gran Canaria. The biomass productivities were 24.66 ± 0.53 kgDW in 32 days (28.9 t/ha/year) for 8000 L indoors, 42.32 ± 0.81 kgDW in 43 days (38.8 t/ha/year) for an 8000 L pond outdoors, and 54.9 ± 0.58 kgDW in 28 days (19.6 t/ha/year) for a 45,000 L pond outdoors. The photosynthetic efficiencies were 1.45 ± 0.03% for an 8000 L pond indoors, 1.95 ± 0.04% for 8000 L outdoors. and 1.10 ± 0.01% for a 45,000 L pond outdoors. The selected strain was fast-growing (µ = 0.21 day−1) and could be rapidly scaled up to 45,000 L; it formed healthy cultures that maintained high photosynthetic activity during long-term cultivation and provided stable biomass productivities, able to grow on urea, which acted as a cheap and effective grazer control. The obtained biomass is a good source of proteins and has an FA profile with a high content of some nutritionally important fatty acids: oleic, α-linolenic (ALA) and EPA. The high ash content in the biomass (>35%) can be reduced by the implementation of additional washing steps after the centrifugation of the culture.
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10
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Gojkovic Z, Lu Y, Ferro L, Toffolo A, Funk C. Modeling biomass production during progressive nitrogen starvation by North Swedish green microalgae. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101835] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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In vitro selenium bioaccessibility combined with in vivo bioavailability and bioactivity in Se-enriched microalga (Chlorella sorokiniana) to be used as functional food. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.103817] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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12
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Kwon G, Kim H, Song C, Jahng D. Co-culture of microalgae and enriched nitrifying bacteria for energy-efficient nitrification. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.107385] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Martínez JM, Gojkovic Z, Ferro L, Maza M, Álvarez I, Raso J, Funk C. Use of pulsed electric field permeabilization to extract astaxanthin from the Nordic microalga Haematococcus pluvialis. BIORESOURCE TECHNOLOGY 2019; 289:121694. [PMID: 31254897 DOI: 10.1016/j.biortech.2019.121694] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/19/2019] [Accepted: 06/20/2019] [Indexed: 05/28/2023]
Abstract
The Nordic microalgal strain Haematococcus pluvialis was exposed to various stress conditions to induce astaxanthin accumulation. Highest carotenoid content (19.1 mg·g-1dw) was achieved in nitrogen-free culture medium at a high light intensity. The efficiency of Pulsed Electric Field (PEF) pre-treatment of stressed fresh biomass of H. pluvialis followed by incubation in the growth medium was compared to classical disruption methods (bead-beating, freezing-thawing, thermal treatment or ultrasound) for the subsequent extraction of astaxanthin in ethanol. N-starved cells treated with PEF followed by aqueous incubation for 6 h resulted in extraction of 96% (18.3 mgcar·gdw-1) of the total carotenoid content compared to 80% (15.3 mgcar·gdw-1) using other physical methods. The proportion of free forms of astaxanthin was higher in PEF-treated samples compared to mechanical disruption, suggesting PEF triggering an esterase activity. PEF pre-treatment of the cells followed by incubation in growth medium improved astaxanthin extraction in the eco-friendly solvent ethanol.
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Affiliation(s)
- Juan Manuel Martínez
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden; Food Technology, Facultad de Veterinaria, Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Zivan Gojkovic
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden
| | - Lorenza Ferro
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden
| | - Marcos Maza
- Food Technology, Facultad de Veterinaria, Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Ignacio Álvarez
- Food Technology, Facultad de Veterinaria, Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Javier Raso
- Food Technology, Facultad de Veterinaria, Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Christiane Funk
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden.
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Pereira H, Silva J, Santos T, Gangadhar KN, Raposo A, Nunes C, Coimbra MA, Gouveia L, Barreira L, Varela J. Nutritional Potential and Toxicological Evaluation of Tetraselmis sp. CTP4 Microalgal Biomass Produced in Industrial Photobioreactors. Molecules 2019; 24:E3192. [PMID: 31484299 PMCID: PMC6749414 DOI: 10.3390/molecules24173192] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/22/2019] [Accepted: 08/27/2019] [Indexed: 12/26/2022] Open
Abstract
Commercial production of microalgal biomass for food and feed is a recent worldwide trend. Although it is common to publish nutritional data for microalgae grown at the lab-scale, data about industrial strains cultivated in an industrial setting are scarce in the literature. Thus, here we present the nutritional composition and a microbiological and toxicological evaluation of Tetraselmis sp. CTP4 biomass, cultivated in 100-m3 photobioreactors at an industrial production facility (AlgaFarm). This microalga contained high amounts of protein (31.2 g/100 g), dietary fibres (24.6 g/100 g), digestible carbohydrates (18.1 g/100 g) and ashes (15.2 g/100 g), but low lipid content (7.04 g/100 g). The biomass displayed a balanced amount of essential amino acids, n-3 polyunsaturated fatty acids, and starch-like polysaccharides. Significant levels of chlorophyll (3.5 g/100 g), carotenoids (0.61 g/100 g), and vitamins (e.g., 79.2 mg ascorbic acid /100 g) were also found in the biomass. Conversely, pathogenic bacteria, heavy metals, cyanotoxins, mycotoxins, polycyclic aromatic hydrocarbons, and pesticides were absent. The biomass showed moderate antioxidant activity in several in vitro assays. Taken together, as the biomass produced has a balanced biochemical composition of macronutrients and (pro-)vitamins, lacking any toxic contaminants, these results suggest that this strain can be used for nutritional applications.
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Affiliation(s)
- Hugo Pereira
- CCMAR-Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal
| | - Joana Silva
- CMP-Cimentos Maceira e Pataias, ALGAFARM - Unidade de Produção de Microalgas, 2445-411 Pataias, Portugal
| | - Tamára Santos
- CCMAR-Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal
| | - Katkam N Gangadhar
- CCMAR-Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal
- LEPABE-Department of Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
| | - Ana Raposo
- CCMAR-Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal
| | - Cláudia Nunes
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- QOPNA and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Manuel A Coimbra
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- QOPNA and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Luísa Gouveia
- LNEG-Laboratório Nacional de Energia e Geologia, I.P./Bioenergy Unit, Estrada do Paço do Lumiar 22, 1649-038 Lisbon, Portugal
| | - Luísa Barreira
- CCMAR-Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal
| | - João Varela
- CCMAR-Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal.
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15
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Romero I, de Francisco P, Gutiérrez JC, Martín-González A. Selenium cytotoxicity in Tetrahymena thermophila: New clues about its biological effects and cellular resistance mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 671:850-865. [PMID: 30947056 DOI: 10.1016/j.scitotenv.2019.03.115] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 03/07/2019] [Accepted: 03/08/2019] [Indexed: 06/09/2023]
Abstract
Selenium is an essential micronutrient but at high concentrations can produce severe cytotoxicity and genomic damage. We have evaluated the cytotoxicity, ultrastructural and mitochondrial alterations of the two main selenium inorganic species; selenite and selenate, in the eukaryotic microorganism Tetrahymena thermophila. In this ciliate, selenite is more toxic than selenate. Their LC50 values were calculated as 27.65 μM for Se(IV) and 56.88 mM for Se(VI). Significant levels of peroxides/hydroperoxides are induced under low-moderate selenite or selenate concentrations. Se(VI) exposures induce an immediate mitochondrial membrane depolarization. Selenium treated cells show an intense vacuolization and some of them present numerous discrete and small electrondense particles, probably selenium deposits. Mitochondrial fusion, an intense swelling in peripheral mitochondria and mitophagy are detected in selenium treated cells, especially in those exposed to Se (IV). qRT-PCR analysis of diverse genes, encoding relevant antioxidant enzymes or other proteins, like metallothioneins, involved in an environmental general stress response, have shown that they may be crucial against Se(IV) and/or Se (VI) cytotoxicity.
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Affiliation(s)
- Ivan Romero
- Dpto. Genética, Fisiología y Microbiología, Facultad de Biología, C/. José Antonio Novais, 12, Universidad Complutense (UCM), 28040 Madrid, Spain
| | - Patricia de Francisco
- Dpto. Genética, Fisiología y Microbiología, Facultad de Biología, C/. José Antonio Novais, 12, Universidad Complutense (UCM), 28040 Madrid, Spain
| | - Juan Carlos Gutiérrez
- Dpto. Genética, Fisiología y Microbiología, Facultad de Biología, C/. José Antonio Novais, 12, Universidad Complutense (UCM), 28040 Madrid, Spain
| | - Ana Martín-González
- Dpto. Genética, Fisiología y Microbiología, Facultad de Biología, C/. José Antonio Novais, 12, Universidad Complutense (UCM), 28040 Madrid, Spain..
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16
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Zsiros O, Nagy V, Párducz Á, Nagy G, Ünnep R, El-Ramady H, Prokisch J, Lisztes-Szabó Z, Fári M, Csajbók J, Tóth SZ, Garab G, Domokos-Szabolcsy É. Effects of selenate and red Se-nanoparticles on the photosynthetic apparatus of Nicotiana tabacum. PHOTOSYNTHESIS RESEARCH 2019; 139:449-460. [PMID: 30374728 DOI: 10.1007/s11120-018-0599-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 10/17/2018] [Indexed: 05/24/2023]
Abstract
Selenium (Se) is a natural trace element, which shifts its action in a relatively narrow concentration range from nutritional role to toxicity. Although it has been well established that in plants chloroplasts are among the primary targets, the mechanism of toxicity on photosynthesis is not well understood. Here, we compared selenate and red-allotrope elemental selenium nanoparticles (red nanoSe) in in vitro tobacco cultures to investigate their effects on the structure and functions of the photosynthetic machinery. Selenate at 10 mg/L concentration retarded plant growth; it also led to a decreased chlorophyll content, accompanied with an increase in the carotenoid-to-chlorophyll ratio. Structural examinations of the photosynthetic machinery, using electron microscopy, small-angle neutron scattering and circular dichroism spectroscopy, revealed significant perturbation in the macro-organization of the pigment-protein complexes and sizeable shrinkage in the repeat distance of granum thylakoid membranes. As shown by chlorophyll a fluorescence transient measurements, these changes in the ultrastructure were associated with a significantly diminished photosystem II activity and a reduced performance of the photosynthetic electron transport, and an enhanced capability of non-photochemical quenching. These changes in the structure and function of the photosynthetic apparatus explain, at least in part, the retarded growth of plantlets in the presence of 10 mg/L selenate. In contrast, red nanoSe, even at 100 mg/L and selenate at 1 mg/L, exerted no negative effect on the growth of plantlets and affected only marginally the thylakoid membrane ultrastructure and the photosynthetic functions.
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Affiliation(s)
- Ottó Zsiros
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, POB 521, Szeged, 6701, Hungary
| | - Valéria Nagy
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, POB 521, Szeged, 6701, Hungary
| | - Árpád Párducz
- Institute of Biophysics, Biological Research Center, Hungarian Academy of Sciences, POB 521, Szeged, 6701, Hungary
| | - Gergely Nagy
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, POB 521, Szeged, 6701, Hungary
- Laboratory for Neutron Scattering, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, POB 49, Budapest, 1525, Hungary
| | - Renáta Ünnep
- Laboratory for Neutron Scattering, Paul Scherrer Institute, 5232, Villigen PSI, Switzerland
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, POB 49, Budapest, 1525, Hungary
| | - Hassan El-Ramady
- Department of Soil and Water Sciences, Faculty of Agriculture, Kafrelsheikh Uni, 33516, Kafr El-Sheikh, Egypt
- Department of Agricultural Botany, Plant Physiology and Biotechnology, University of Debrecen, Egyetem ter 1, Debrecen, 4032, Hungary
| | - József Prokisch
- Bio- and Environmental Enegetics Inst., Nano Food Lab, Debrecen University, Boszormenyi 138, Debrecen, 4032, Hungary
| | - Zsuzsa Lisztes-Szabó
- Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, 4026, Hungary
| | - Miklós Fári
- Department of Agricultural Botany, Plant Physiology and Biotechnology, University of Debrecen, Egyetem ter 1, Debrecen, 4032, Hungary
| | - József Csajbók
- Department of Crop Production and Applied Ecology, University of Debrecen, Boszormenyi 138, Debrecen, 4032, Hungary
| | - Szilvia Zita Tóth
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, POB 521, Szeged, 6701, Hungary
| | - Győző Garab
- Institute of Plant Biology, Biological Research Center, Hungarian Academy of Sciences, POB 521, Szeged, 6701, Hungary
- Department of Physics, Faculty of Science, Ostrava University, Chittussiho 10, 710 0, Ostrava - Slezská Ostrava, Czech Republic
| | - Éva Domokos-Szabolcsy
- Department of Agricultural Botany, Plant Physiology and Biotechnology, University of Debrecen, Egyetem ter 1, Debrecen, 4032, Hungary.
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Jaskulak M, Rorat A, Grobelak A, Kacprzak M. Antioxidative enzymes and expression of rbcL gene as tools to monitor heavy metal-related stress in plants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 218:71-78. [PMID: 29665488 DOI: 10.1016/j.jenvman.2018.04.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 03/06/2018] [Accepted: 04/11/2018] [Indexed: 05/28/2023]
Abstract
The aim of the study was to evaluate sensitivity and potential applications of selected biomarkers in phytoremediation under complex heavy metal contamination in Sinapis alba L., Robinia pseudoacacia L. and Lupinus luteus L as a potential tools in effective phytoremediation management. The toxicity assessment was conducted using selected measurement endpoints, both classical and advanced, i.e., germination index, roots length, guaiacol peroxidase activity (GPX), chlorophyll and protein content, the amount of total phenolic compounds (TPC) and level of expression of one of the ribulose-bisphosphate carboxylase genes (rbcL). Moreover, the influence of organic additives: cattle, horse manure, and vermicompost on lowering plant abiotic stress caused by complex heavy metal contamination was studied to assess the possible applications of selected stress markers in large scale phytoremediation planning. The results demonstrated the beneficial effects of selected soil additives on plant development. The 5% difference in the quantity of applied amendment caused statistically significant differences in GPX, TPC, chlorophyll content and expression level of rbcL. Among all endpoints, GPX activity, chlorophyll, and phenolic compounds content, as well as the expression of rbcL, turned out to be the most reliable assays for determination of the type and dosage of selected soil amendments (fertilizers) in the assisted phytoremediation process. Selected markers can be used to achieve the desired level of plant abiotic stress and consequently photosynthesis efficiency and CO2 sequestration. The results showed, that presented assays can be used in different taxonomical groups such as Fabaceae for planning effective phytoremediation process.
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Affiliation(s)
- Marta Jaskulak
- Institute of Environmental Engineering, Faculty of Infrastructure and Environment, Czestochowa University of Technology, Czestochowa, Poland
| | - Agnieszka Rorat
- Université Lille Nord de France, LGCgE-Lille 1, Ecologie Numérique et Ecotoxicologie, F-59650 Villeneuve d'Ascq, France
| | - Anna Grobelak
- Institute of Environmental Engineering, Faculty of Infrastructure and Environment, Czestochowa University of Technology, Czestochowa, Poland.
| | - Małgorzata Kacprzak
- Institute of Environmental Engineering, Faculty of Infrastructure and Environment, Czestochowa University of Technology, Czestochowa, Poland
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Isolation and characterization of microalgal strains for biomass production and wastewater reclamation in Northern Sweden. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.03.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Babaei A, Ranglová K, Malapascua JR, Masojídek J. The synergistic effect of Selenium (selenite, -SeO 32-) dose and irradiance intensity in Chlorella cultures. AMB Express 2017; 7:56. [PMID: 28265976 PMCID: PMC5339263 DOI: 10.1186/s13568-017-0348-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 02/15/2017] [Indexed: 12/02/2022] Open
Abstract
Microalgae are able to metabolize inorganic selenium (Se) to organic forms (e.g. Se-proteins); nevertheless at certain Se concentration culture growth is inhibited. The aim of this work was to confirm the hypothesis that the limit of Se tolerance in Chlorella cultures is related to photosynthetic performance, i.e. depends on light intensity. We studied the relation between the dose and irradiance to find the range of Se tolerance in laboratory and outdoor cultures. At low irradiance (250 µmol photons m−2 s−1), the daily dose of Se below 8.5 mg per g of biomass (<20 µM) partially stimulated the photosynthetic activity (relative electron transport rate) and growth of Chlorella cultures (biomass density of ~1.5 g DW L−1) compared to the control (no Se added). It was accompanied by substantial Se incorporation to microalgae biomass (~0.5 mg Se g−1 DW). When the Se daily dose and level of irradiance were doubled (16 mg Se g−1 DW; 500 µmol photons m−2 s−1), the photosynthetic activity and growth were stimulated for several days and ample incorporation of Se to biomass (7.1 mg g−1 DW) was observed. Yet, the same Se daily dose under increased irradiance (750 µmol photons m−2 s−1) caused the synergistic effect manifested by significant inhibition of photosynthesis, growth and lowered Se incorporation to biomass. In the present experiments Chl fluorescence techniques were used to monitor photosynthetic activity for determination of optimal Se doses in order to achieve efficient incorporation without substantial inhibition of microalgae growth when producing Se-enriched biomass.
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