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Cezare-Gomes EA, Lousada MEG, Matsudo MC, Ferreira-Camargo LS, Ishii M, Singh AK, Carvalho JCM. Two-stage semi-continuous cultivation of Dunaliella salina for β-carotene production. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1007/s43153-022-00246-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Xi Y, Zhang J, Kong F, Che J, Chi Z. Kinetic modeling and process analysis for photo-production of β-carotene in Dunaliella salina. BIORESOUR BIOPROCESS 2022; 9:4. [PMID: 38647742 PMCID: PMC10991233 DOI: 10.1186/s40643-022-00495-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 01/08/2022] [Indexed: 12/31/2022] Open
Abstract
Dunaliella salina is a green microalga with the great potential to generate natural β-carotene. However, the corresponding mathematical models to guide optimized production of β-carotene in Dunaliella salina (D. salina) are not yet available. In this study, dynamic models were proposed to simulate effects of environmental factors on cell growth and β-carotene production in D. salina using online monitoring system. Moreover, the identification model of the parameter variables was established, and an adaptive particle swarm optimization algorithm based on parameter sensitivity analysis was constructed to solve the premature problem of particle swarm algorithm. The proposed kinetic model is characterized by high accuracy and predictability through experimental verification, which indicates its competence for future process design, control, and optimization. Based on the model established in this study, the optimal environmental factors for both β-carotene production and microalgae growth were identified. The approaches created are potentially useful for microalga Dunaliella salina cultivation and high-value β-carotene production.
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Affiliation(s)
- Yimei Xi
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Jiali Zhang
- School of Mathematical Sciences, Dalian University of Technology, Dalian, 116024, China
| | - Fantao Kong
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China.
| | - Jian Che
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China.
- Dalian Xinyulong Marine Biological Seed Technology Co. Ltd, Dalian, 116200, China.
| | - Zhanyou Chi
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
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Xi Y, Xue S, Cao X, Chi Z, Wang J. Quantitative analysis on photon numbers received per cell for triggering β-carotene accumulation in Dunaliella salina. BIORESOUR BIOPROCESS 2021; 8:104. [PMID: 38650246 PMCID: PMC10992135 DOI: 10.1186/s40643-021-00457-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 10/10/2021] [Indexed: 11/10/2022] Open
Abstract
Accumulation of β-carotene in Dunaliella salina is highly dependent on light exposure intensity and duration, but quantitative analysis on photon numbers received per cell for triggering β-carotene accumulation is not available so far. In this study, experiment results showed that significant β-carotene accumulation occurred after at least 8 h illumination at 400 µmol photons·m-2·s-1. To quantify the average number of photons received per cell, correlations of light attenuation with light path, biomass concentration, and β-carotene content were, respectively, established using both Lambert-Beer and Cornet models, and the latter provided better simulation. Using Cornet model, average number of photons received per cell (APRPC) was calculated and proposed as a parameter for β-carotene accumulation, and constant APRPC was maintained by adjusting average irradiance based on cell concentration and carotenoids content changes during the whole induction period. It was found that once APRPC reached 0.7 µmol photons cell-1, β-carotene accumulation was triggered, and it was saturated at 9.9 µmol photons cell-1. This study showed that APRPC can be used as an important parameter to precisely simulate and control β-carotene production by D. salina.
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Affiliation(s)
- Yimei Xi
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Song Xue
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Xupeng Cao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 16023, China
| | - Zhanyou Chi
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China.
| | - Jinghan Wang
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China.
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Kottuparambil S, Agusti S. Cell-by-cell estimation of PAH sorption and subsequent toxicity in marine phytoplankton. CHEMOSPHERE 2020; 259:127487. [PMID: 32650165 DOI: 10.1016/j.chemosphere.2020.127487] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 06/11/2023]
Abstract
Polycyclic Aromatic Hydrocarbons (PAHs) have elicited increasing concern due to their ubiquitous occurrence in coastal marine environments and resultant toxicity in organisms. Due to their lipophilic nature, PAHs tend to accumulate in phytoplankton cells and thus subsequently transfer to other compartments of the marine ecosystem. The intrinsic fluorescence properties of PAHs in the ultraviolet (UV)/blue spectral range have recently been exploited to investigate their uptake modes, localization, and aggregation in various biological tissues. Here, we quantitatively evaluate the sorption of two model PAHs (phenanthrene and pyrene) in three marine phytoplankton species (Chaetoceros tenuissimus, Thalassiosira sp. and Proteomonas sp.) using a combined approach of UV excitation flow cytometry and fluorescence microscopy. Over a 48-h exposure to a gradient of PAHs, Thalassiosira sp. showed the highest proportion of PAH-sorbed cells (29% and 97% of total abundance for phenanthrene and pyrene, respectively), which may be attributed to its relatively high total lipid content (33.87 percent dry weight). Moreover, cell-specific pulse amplitude modulation (PAM) microscope fluorometry revealed that PAH sorption significantly reduced the photosynthetic quantum efficiency (Fv/Fm) of individual phytoplankton cells. We describe a rapid and precise hybrid method for the detection of sorption of PAHs on phytoplankton cells. Our results emphasize the ecologically relevant sub-lethal effects of PAHs in phytoplankton at the cellular level, even at concentrations where no growth inhibition was apparent. This work is the first study to address the cell-specific impacts of fluorescent toxicants in a more relevant toxicant-sorbed subpopulation; these cell-specific impacts have to date been unidentified in traditional population-based phytoplankton toxicity assays.
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Affiliation(s)
- Sreejith Kottuparambil
- Division of Biological and Environmental Science and Engineering (BESE), Red Sea Research Center (RSRC), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
| | - Susana Agusti
- Division of Biological and Environmental Science and Engineering (BESE), Red Sea Research Center (RSRC), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
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Xi Y, Wang J, Xue S, Chi Z. β-Carotene Production from Dunaliella salina Cultivated with Bicarbonate as Carbon Source. J Microbiol Biotechnol 2020; 30:868-877. [PMID: 32238762 PMCID: PMC9728381 DOI: 10.4014/jmb.1910.10035] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 03/10/2020] [Indexed: 12/15/2022]
Abstract
Bicarbonate has been considered as a better approach for supplying CO2 to microalgae cells microenvironments than gas bubbling owing t°Cost-effectiveness and easy operation. However, the β-carotene production was too low in Dunaliella salina cultivated with bicarbonate in previous studies. Also, the difference in photosynthetic efficiency between these tw°Carbon sources (bicarbonate and CO2) has seldom been discussed. In this study, the culture conditions, including NaHCO3, Ca2+, Mg2+ and microelement concentrations, were optimized when bicarbonate was used as carbon source. Under optimized condition, a maximum biomass concentration of 0.71 g/l and corresponding β-carotene content of 4.76% were obtained, with β-carotene yield of 32.0 mg/l, much higher than previous studies with NaHCO3. Finally, these optimized conditions with bicarbonate were compared with CO2 bubbling by online monitoring. There was a notable difference in Fv/Fm value between cultivations with bicarbonate and CO2, but there was no difference in the Fv/Fm periodic changing patterns. This indicates that the high concentration of NaHCO3 used in this study served as a stress factor for β-carotene accumulation, although high productivity of biomass was still obtained.
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Affiliation(s)
- Yimei Xi
- School of Bioengineering, Dalian University of Technology, Dalian 116024, P.R. China
| | - Jinghan Wang
- School of Bioengineering, Dalian University of Technology, Dalian 116024, P.R. China
| | - Song Xue
- School of Bioengineering, Dalian University of Technology, Dalian 116024, P.R. China
| | - Zhanyou Chi
- School of Bioengineering, Dalian University of Technology, Dalian 116024, P.R. China,Corresponding author Phone: +86-132-3405-3986 E-mail:
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Carotenoids Overproduction in Dunaliella Sp.: Transcriptional Changes and New Insights through Lycopene β Cyclase Regulation. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9245389] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Dunaliella is a green microalga known for its ability to produce high levels of carotenoids under well-defined growing conditions. Molecular responses to the simultaneous effect of increasing salinity, light intensity and decrease of nitrogen availability were investigated in terms of their effect on different metabolic pathways (isoprenoids synthesis, glycolysis, carbohydrate use, etc.) by following the transcriptional regulation of enolase (ENO), 1-deoxy-D-xylulose 5-phosphate synthase (DXS), lycopene β-cyclase (LCYB), carotene globule protein (CGP), chloroplast-localized heat shock protein (HSP70), and chloroplast ribulose phosphate-3-epimerase (RPE) genes. The intracellular production of carotenoid was increased five times in stressed Dunaliella cells compared to those grown in an unstressed condition. At transcriptional levels, ENO implicated in glycolysis, and revealing about polysaccharides degradation, showed a two-stage response during the first 72 h. Genes directly involved in β-carotene accumulation, namely, CGP and LCYB, revealed the most important increase by about 54 and 10 folds, respectively. In silico sequence analysis, along with 3D modeling studies, were performed to identify possible posttranslational modifications of CGP and LCYB proteins. Our results described, for the first time, their probable regulation by sumoylation covalent attachment as well as the presence of expressed SUMO (small ubiquitin-related modifier) protein in Dunaliella sp.
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Sassi PGP, Calixto CD, Tibúrcio VP, da Silva Nonato N, Abrahão R, Hégaret H, da Costa Sassi CF, Sassi R. Effectiveness of nutrient remotion and cell physiology of Amphora sp. cultured in shrimp farm effluents. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:17920-17926. [PMID: 29680887 DOI: 10.1007/s11356-018-2011-5] [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: 12/20/2017] [Accepted: 04/11/2018] [Indexed: 06/08/2023]
Abstract
Shrimp farm effluents are one of the principal causes of eutrophication in coastal environments. Integrated processes of bioremediation involving the culturing of purifying organisms have been suggested, but very few studies have focused on microalgae. For that purpose evaluated the growth potential of Amphora sp. in the residual waters of shrimp farm activity fulfilled on the Paraíba State, Brazil. The experiments were performed using Conway medium as the control and wastewaters from shrimp farm at 100% concentrations. Amphora sp. demonstrated good growth in the shrimp farm effluents under test conditions, although less than that observed in the control medium. This diatom was found to removed 73.357 and 72.572% of PO4- and NO3-, respectively, demonstrating a high mitigation potential for this type of effluent. Comparisons of the physiological responses measured by flow cytometry demonstrated higher cell densities of Amphora sp. in the control medium, but a higher lipid content was observed in Amphora cultured in shrimp farm effluents.
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Affiliation(s)
- Patrícia Giulianna Petraglia Sassi
- Laboratório de Ambientes Recifais e Biotecnologia com Microalgas-LARBIM, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Campus I, João Pessoa, Paraíba, 58051-900, Brazil.
| | - Clediana Dantas Calixto
- Laboratório de Ambientes Recifais e Biotecnologia com Microalgas-LARBIM, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Campus I, João Pessoa, Paraíba, 58051-900, Brazil
| | - Viviane Pereira Tibúrcio
- Laboratório de Ambientes Recifais e Biotecnologia com Microalgas-LARBIM, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Campus I, João Pessoa, Paraíba, 58051-900, Brazil
| | - Nyelson da Silva Nonato
- Laboratório de Ambientes Recifais e Biotecnologia com Microalgas-LARBIM, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Campus I, João Pessoa, Paraíba, 58051-900, Brazil
| | - Raphael Abrahão
- Departamento de Engenharia de Energias Renováveis, Centro de Energias Alternativas e Renováveis, Universidade Federal da Paraíba, Campus I, João Pessoa, Paraíba, 58051-970, Brazil
| | - Hélène Hégaret
- Laboratoire des Sciences de l'Environnement Marin-LEMAR (UMR6539), IUEM, Place Nicolas Copernic, 29280, Plouzané, France
| | - Cristiane Francisca da Costa Sassi
- Laboratório de Ambientes Recifais e Biotecnologia com Microalgas-LARBIM, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Campus I, João Pessoa, Paraíba, 58051-900, Brazil
| | - Roberto Sassi
- Laboratório de Ambientes Recifais e Biotecnologia com Microalgas-LARBIM, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Campus I, João Pessoa, Paraíba, 58051-900, Brazil
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Yuan Y, Liu H, Li X, Qi W, Cheng D, Tang T, Zhao Q, Wei W, Sun Y. Enhancing Carbohydrate Productivity of Chlorella sp. AE10 in Semi-continuous Cultivation and Unraveling the Mechanism by Flow Cytometry. Appl Biochem Biotechnol 2017; 185:419-433. [DOI: 10.1007/s12010-017-2667-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 11/17/2017] [Indexed: 11/24/2022]
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Fachet M, Flassig RJ, Rihko-Struckmann LK, Sundmacher K. Carotenoid Production Process Using Green Microalgae of the Dunaliella Genus: Model-Based Analysis of Interspecies Variability. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Melanie Fachet
- Process
Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, 39106, Germany
| | - Robert J. Flassig
- Process
Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, 39106, Germany
| | - Liisa K. Rihko-Struckmann
- Process
Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, 39106, Germany
| | - Kai Sundmacher
- Process
Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, 39106, Germany
- Process
Systems Engineering, Otto von Guericke University Magdeburg, Magdeburg, 39106, Germany
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Halophilic microalgaeDunaliella salinaextracts improve seed germination and seedling growth ofTriticum aestivumL. under salt stress. ACTA ACUST UNITED AC 2016. [DOI: 10.17660/actahortic.2016.1148.2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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