1
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Investigation of hydrogen peroxide-driven transcriptional stress on the biomass growth of Chlorella pyrenoidosa. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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2
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Sá M, Ferrer-Ledo N, Gao F, Bertinetto CG, Jansen J, Crespo JG, Wijffels RH, Barbosa M, Galinha CF. Perspectives of fluorescence spectroscopy for online monitoring in microalgae industry. Microb Biotechnol 2022; 15:1824-1838. [PMID: 35175653 PMCID: PMC9151345 DOI: 10.1111/1751-7915.14013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 11/27/2022] Open
Abstract
Microalgae industrial production is viewed as a solution for alternative production of nutraceuticals, cosmetics, biofertilizers, and biopolymers. Throughout the years, several technological advances have been implemented, increasing the competitiveness of microalgae industry. However, online monitoring and real-time process control of a microalgae production factory still require further development. In this mini-review, non-destructive tools for online monitoring of cellular agriculture applications are described. Still, the focus is on the use of fluorescence spectroscopy to monitor several parameters (cell concentration, pigments, and lipids) in the microalgae industry. The development presented makes it the most promising solution for monitoring up-and downstream processes, different biological parameters simultaneously, and different microalgae species. The improvements needed for industrial application of this technology are also discussed.
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Affiliation(s)
- Marta Sá
- Bioprocess Engineering, Wageningen University and Research, Wageningen, 6708PB, The Netherlands.,Stichting imec Nederland - OnePlanet Research Center, Wageningen, 6708WH, The Netherlands
| | - Narcis Ferrer-Ledo
- Bioprocess Engineering, Wageningen University and Research, Wageningen, 6708PB, The Netherlands
| | - Fengzheng Gao
- Bioprocess Engineering, Wageningen University and Research, Wageningen, 6708PB, The Netherlands
| | - Carlo G Bertinetto
- Institute for Molecules and Materials (Analytical Chemistry), Radboud University, Nijmegen, The Netherlands
| | - Jeroen Jansen
- Institute for Molecules and Materials (Analytical Chemistry), Radboud University, Nijmegen, The Netherlands
| | - João G Crespo
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Caparica, 2829-516, Portugal
| | - Rene H Wijffels
- Bioprocess Engineering, Wageningen University and Research, Wageningen, 6708PB, The Netherlands.,Faculty of Biosciences and Aquaculture, Nord University, Bodø, N-8049, Norway
| | - Maria Barbosa
- Bioprocess Engineering, Wageningen University and Research, Wageningen, 6708PB, The Netherlands
| | - Claudia F Galinha
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Caparica, 2829-516, Portugal
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3
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Coordinating Carbon Metabolism and Cell Cycle of Chlamydomonasreinhardtii with Light Strategies under Nitrogen Recovery. Microorganisms 2021; 9:microorganisms9122480. [PMID: 34946081 PMCID: PMC8707240 DOI: 10.3390/microorganisms9122480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/17/2022] Open
Abstract
Nutrient supplementation is common in microalgae cultivation to enhance the accumulation of biomass and biofunctional products, while the recovery mechanism from nutrient starvation is less investigated. In this study, the influence of remodeled carbon metabolism on cell cycle progression was explored by using different light wavelengths under N-repletion and N-recovery. The results suggested that blue light enhanced cell enlargement and red light promoted cell division under N-repletion. On the contrary, blue light promoted cell division by stimulating cell cycle progression under N-recovery. This interesting phenomenon was ascribed to different carbon metabolisms under N-repletion and N-recovery. Blue light promoted the recovery of photosystem II and redirected carbon skeletons into proteins under N-recovery, which potentially accelerated cell recovery and cell cycle progression. Although red light also facilitated the recovery of photosystem II, it mitigated the degradation of polysaccharide and then arrested almost all the cells in the G1 phase. By converting light wavelengths at the 12 h of N-recovery with blue light, red and white lights were proved to increase biomass concentration better than continuous blue light. These results revealed different mechanisms of cell metabolism of Chlamydomonas reinhardtii during N-recovery and could be applied to enhance cell vitality of microalgae from nutrient starvation and boost biomass production.
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4
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Wu Q, Guo L, Li X, Wang Y. Effect of phosphorus concentration and light/dark condition on phosphorus uptake and distribution with microalgae. BIORESOURCE TECHNOLOGY 2021; 340:125745. [PMID: 34426241 DOI: 10.1016/j.biortech.2021.125745] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/05/2021] [Accepted: 08/07/2021] [Indexed: 06/13/2023]
Abstract
In this study, the effects of P concentration and light/dark condition on the distribution of P in microalgae were tracked with Scenedesmus sp.393. Results showed that different culture conditions affected the accumulation capacity and transformation of P in intracellular polymeric substances (IPS), extracellular polymeric substances (EPS), and soluble microbial products (SMP). At low P concentration (0.70 mg P/L), inorganic phosphorus (IP) absorbed in EPS (19.40%) and organic phosphorus (OP) accumulated in IPS (70.98%) were mainly P forms in microalgae. High P concentration (>21.42 mg P/L) promoted the luxury uptake and accumulation of IP by IPS, and the conversion of IP to OP. However, the adsorption of IP by EPS was inhibited when exposed to high external P concentration. Continuous illumination promoted the microalgae growth, and dark condition stimulated the P accumulation in microalgae biomass. The results of this study could provide valuable information for P recovery with microalgae.
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Affiliation(s)
- Qirui Wu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Laboratory of Marine Environmental and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
| | - Xunzhou Li
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yu Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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5
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Sarkar S, Manna MS, Bhowmick TK, Gayen K. Effect of different illumination patterns on the growth and biomolecular synthesis of isolated Chlorella Thermophila in a 50 L pilot-scale photobioreactor. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.07.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Kronenberg L, Yates S, Ghiasi S, Roth L, Friedli M, Ruckle ME, Werner RA, Tschurr F, Binggeli M, Buchmann N, Studer B, Walter A. Rethinking temperature effects on leaf growth, gene expression and metabolism: Diel variation matters. PLANT, CELL & ENVIRONMENT 2021; 44:2262-2276. [PMID: 33230869 PMCID: PMC8359295 DOI: 10.1111/pce.13958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/17/2020] [Accepted: 11/18/2020] [Indexed: 06/11/2023]
Abstract
Plants have evolved to grow under prominently fluctuating environmental conditions. In experiments under controlled conditions, temperature is often set to artificial, binary regimes with constant values at day and at night. This study investigated how such a diel (24 hr) temperature regime affects leaf growth, carbohydrate metabolism and gene expression, compared to a temperature regime with a field-like gradual increase and decline throughout 24 hr. Soybean (Glycine max) was grown under two contrasting diel temperature treatments. Leaf growth was measured in high temporal resolution. Periodical measurements were performed of carbohydrate concentrations, carbon isotopes as well as the transcriptome by RNA sequencing. Leaf growth activity peaked at different times under the two treatments, which cannot be explained intuitively. Under field-like temperature conditions, leaf growth followed temperature and peaked in the afternoon, whereas in the binary temperature regime, growth increased at night and decreased during daytime. Differential gene expression data suggest that a synchronization of cell division activity seems to be evoked in the binary temperature regime. Overall, the results show that the coordination of a wide range of metabolic processes is markedly affected by the diel variation of temperature, which emphasizes the importance of realistic environmental settings in controlled condition experiments.
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Affiliation(s)
- Lukas Kronenberg
- Crop ScienceInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Steven Yates
- Molecular Plant BreedingInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Shiva Ghiasi
- Grassland SciencesInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Lukas Roth
- Crop ScienceInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Michael Friedli
- Crop ScienceInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Michael E. Ruckle
- Molecular Plant BreedingInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Roland A. Werner
- Grassland SciencesInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Flavian Tschurr
- Crop ScienceInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Melanie Binggeli
- Crop ScienceInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Nina Buchmann
- Grassland SciencesInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Bruno Studer
- Molecular Plant BreedingInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
| | - Achim Walter
- Crop ScienceInstitute of Agricultural Sciences, ETH ZurichZurichSwitzerland
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7
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Zhao T, Liu M, Zhao T, Chen A, Zhang L, Liu H, Ding K, Xiao P. Enhancement of lipid productivity in Chlorella pyrenoidosa by collecting cells at the maximum cell number in a two-stage culture strategy. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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8
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Su Y. Revisiting carbon, nitrogen, and phosphorus metabolisms in microalgae for wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 762:144590. [PMID: 33360454 DOI: 10.1016/j.scitotenv.2020.144590] [Citation(s) in RCA: 136] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/10/2020] [Accepted: 12/12/2020] [Indexed: 05/05/2023]
Abstract
Threats posed to humans - including environmental pollution, water scarcity, food shortages, and resource crises drive a new concept to think about wastewater and its treatment. Wastewater is not only a waste but also a source of energy, renewable and/or non-renewable resources, including water itself. The nutrient in wastewater should not only be removed but also need to be upcycled. Microalgae based wastewater treatment has attracted considerable interests because algae have the potential to efficiently redirect nutrients from wastewater to the accumulated algal biomass. Additionally, microalgae are commercialized in human consumption and animal feed owing to their high content of essential amino and fatty acids, vitamins, and pigments. The whole process establishes a circular economy, totally relying on the ability of microalgae to uptake and store nutrients in wastewater, such as carbon (C), nitrogen (N), and phosphorus (P). It makes the study of the mechanisms underlying the uptake and storage of nutrients in microalgae of great interest. This review specifically aims to summarize C, N, and P metabolisms in microalgae for a better understanding of the microalgae-based wastewater treatment from the nutrient uptake pathway, and examine the key physiological factors or the operating conditions related to nutrient metabolisms that may affect the treatment efficiency. At last, I discuss the potential approaches to enhance the overall treatment performance by adjusting the critical parameters for C, N, and P metabolisms.
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Affiliation(s)
- Yanyan Su
- Carlsberg Research Laboratory, Bjerregaardsvej 5, 2500 Valby, Denmark.
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9
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Gao F, Sá M, Teles (Cabanelas, ITD) I, Wijffels RH, Barbosa MJ. Production and monitoring of biomass and fucoxanthin with brown microalgae under outdoor conditions. Biotechnol Bioeng 2021; 118:1355-1365. [PMID: 33325031 PMCID: PMC7986402 DOI: 10.1002/bit.27657] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/25/2020] [Accepted: 12/09/2020] [Indexed: 12/19/2022]
Abstract
The effect of light on biomass and fucoxanthin (Fx) productivities was studied in two microalgae, Tisochrysis lutea and Phaeodactylum tricornutum. High and low biomass concentrations (1.1 and 0.4 g L-1 ) were tested in outdoor pilot-scale flat-panel photobioreactors at semi-continuous cultivation mode. Fluorescence spectroscopy coupled with chemometric modeling was used to develop prediction models for Fx content and for biomass concentration to be applied for both microalgae species. Prediction models showed high R2 for cell concentration (.93) and Fx content (.77). Biomass productivity was lower for high biomass concentration than low biomass concentration, for both microalgae (1.1 g L-1 : 75.66 and 98.14 mg L-1 d-1 , for T. lutea and P. tricornutum, respectively; 0.4 g L-1 : 129.9 and 158.47 mg L-1 d-1 , T. lutea and P. tricornutum). The same trend was observed in Fx productivity (1.1 g L-1 : 1.14 and 1.41 mg L-1 d-1 , T. lutea and P. tricornutum; 0.4 g L-1 : 2.09 and 1.73 mg L-1 d-1 , T. lutea and P. tricornutum). These results show that biomass and Fx productivities can be set by controlling biomass concentration under outdoor conditions and can be predicted using fluorescence spectroscopy. This monitoring tool opens new possibilities for online process control and optimization.
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Affiliation(s)
- Fengzheng Gao
- Agrotechnology and Food Sciences, Bioprocess Engineering, AlgaePARCWageningen UniversityWageningenThe Netherlands
| | - Marta Sá
- Agrotechnology and Food Sciences, Bioprocess Engineering, AlgaePARCWageningen UniversityWageningenThe Netherlands
| | - Iago Teles (Cabanelas, ITD)
- Agrotechnology and Food Sciences, Bioprocess Engineering, AlgaePARCWageningen UniversityWageningenThe Netherlands
| | - René H. Wijffels
- Agrotechnology and Food Sciences, Bioprocess Engineering, AlgaePARCWageningen UniversityWageningenThe Netherlands
- Aquaculture, Faculty Biosciences and AquacultureNord UniversityBodøNorway
| | - Maria J. Barbosa
- Agrotechnology and Food Sciences, Bioprocess Engineering, AlgaePARCWageningen UniversityWageningenThe Netherlands
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10
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11
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Growth and fatty acid content of Rhodomonas sp. under day:night cycles of light and temperature. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Barten RJ, Wijffels RH, Barbosa MJ. Bioprospecting and characterization of temperature tolerant microalgae from Bonaire. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102008] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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León-Saiki GM, Carreres BM, Remmers IM, Wijffels RH, Martins dos Santos VA, van der Veen D, Schaap PJ, Suarez-Diez M, Martens DE. Evaluation of diurnal responses of Tetradesmus obliquus under nitrogen limitation. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Fluorescence spectroscopy and chemometrics for simultaneous monitoring of cell concentration, chlorophyll and fatty acids in Nannochloropsis oceanica. Sci Rep 2020; 10:7688. [PMID: 32376848 PMCID: PMC7203222 DOI: 10.1038/s41598-020-64628-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 03/31/2020] [Indexed: 11/30/2022] Open
Abstract
Online monitoring of algal biotechnological processes still requires development to support economic sustainability. In this work, fluorescence spectroscopy coupled with chemometric modelling is studied to monitor simultaneously several compounds of interest, such as chlorophyll and fatty acids, but also the biomass as a whole (cell concentration). Fluorescence excitation-emission matrices (EEM) were acquired in experiments where different environmental growing parameters were tested, namely light regime, temperature and nitrogen (replete or deplete medium). The prediction models developed have a high R2 for the validation data set for all five parameters monitored, specifically cell concentration (0.66), chlorophyll (0.78), and fatty acid as total (0.78), saturated (0.81) and unsaturated (0.74). Regression coefficient maps of the models show the importance of the pigment region for all outputs studied, and the protein-like fluorescence region for the cell concentration. These results demonstrate for the first time the potential of fluorescence spectroscopy for in vivo and real-time monitoring of these key performance parameters during Nannochloropsis oceanica cultivation.
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15
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Fret J, Roef L, Diels L, Tavernier S, Vyverman W, Michiels M. Combining medium recirculation with alternating the microalga production strain: a laboratory and pilot scale cultivation test. ALGAL RES 2020. [DOI: 10.1016/j.algal.2019.101763] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Archer L, Mc Gee D, Paskuliakova A, McCoy GR, Smyth T, Gillespie E, Touzet N. Fatty acid profiling of new Irish microalgal isolates producing the high-value metabolites EPA and DHA. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101671] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Giraldo JB, Stock W, Dow L, Roef L, Willems A, Mangelinckx S, Kroth PG, Vyverman W, Michiels M. Influence of the algal microbiome on biofouling during industrial cultivation of Nannochloropsis sp. in closed photobioreactors. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Zhang L, Liao C, Yang Y, Wang YZ, Ding K, Huo D, Hou C. Response of lipid biosynthesis in Chlorella pyrenoidosa to intracellular reactive oxygen species level under stress conditions. BIORESOURCE TECHNOLOGY 2019; 287:121414. [PMID: 31078813 DOI: 10.1016/j.biortech.2019.121414] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 05/01/2019] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
An increase in the total lipid content in algal cells under stress conditions is often accompanied by an increase in reactive oxygen species (ROS). However, the link between these two events is unclear. In this study, the regulatory mechanism of ROS formation on lipid accumulation in C. pyrenoidosa was investigated using a Fenton-like reaction. A high Spearman correlation coefficient of 0.901 was obtained between the Hydroxyl radical (OH) level and lipid content. Importantly, the increase in the total lipid content was clearly coupled with a significant increase in the intracellular OH concentration rather than increases in the H2O2 and O2- concentrations. Transcriptome data confirms that most of the differential expression genes (DEGs) involved in fatty acid and glycerolipid biosynthesis were up-regulated by the increased OH under stress conditions. These results reveal that lipid accumulation in algal cells was promoted by OH.
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Affiliation(s)
- Lei Zhang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Chunmei Liao
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Yingwu Yang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Yong-Zhong Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China.
| | - Ke Ding
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Danqun Huo
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Changjun Hou
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
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19
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Suarez Garcia E, Lo C, Eppink M, Wijffels R, van den Berg C. Understanding mild cell disintegration of microalgae in bead mills for the release of biomolecules. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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20
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21
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Sui Y, Muys M, Vermeir P, D'Adamo S, Vlaeminck SE. Light regime and growth phase affect the microalgal production of protein quantity and quality with Dunaliella salina. BIORESOURCE TECHNOLOGY 2019; 275:145-152. [PMID: 30583115 DOI: 10.1016/j.biortech.2018.12.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 12/13/2018] [Accepted: 12/14/2018] [Indexed: 06/09/2023]
Abstract
The microalga Dunaliella salina has been widely studied for carotenogenesis, yet its protein production for human nutrition has rarely been reported. This study unveils the effects of growth phase and light regime on protein and essential amino acid (EAA) levels in D. salina. Cultivation under 24-h continuous light was compared to 12-h/12-h light/dark cycle. The essential amino acid index (EAAI) of D. salina showed accumulating trends up to 1.53 in the stationary phase, surpassing FAO/WHO standard for human nutrition. Light/dark conditions inferred a higher light-usage efficiency, yielding 5-97% higher protein and 18-28% higher EAA mass on light energy throughout the growth, accompanied by 138% faster growth during the light phase of the light/dark cycle, compared to continuous light. The findings revealed D. salina to be especially suitable for high-quality protein production, particularly grown under light/dark conditions, with nitrogen limitation as possible trigger, and harvested in the stationary phase.
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Affiliation(s)
- Yixing Sui
- Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Maarten Muys
- Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Pieter Vermeir
- Laboratory of Chemical Analysis, Department of Green Chemistry and Technology, Gent University, Valentin Vaerwyckweg 1, 9000 Gent, Belgium
| | - Sarah D'Adamo
- Bioprocess Engineering, Wageningen University & Research, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - Siegfried E Vlaeminck
- Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium.
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22
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Bohutskyi P, Spierling RE, Phan D, Kopachevsky AM, Tang Y, Betenbaugh MJ, Bouwer EJ, Lundquist TJ. Bioenergy from wastewater resources: Nutrient removal, productivity and settleability of indigenous algal-bacteria polyculture, and effect of biomass composition variability on methane production kinetics and anaerobic digestion energy balance. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.10.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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23
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Sake CL, Metcalf AJ, Boyle NR. The challenge and potential of photosynthesis: unique considerations for metabolic flux measurements in photosynthetic microorganisms. Biotechnol Lett 2018; 41:35-45. [PMID: 30430405 PMCID: PMC6313361 DOI: 10.1007/s10529-018-2622-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 11/07/2018] [Indexed: 11/29/2022]
Abstract
Photosynthetic microorganisms have the potential for sustainable production of chemical feedstocks and products but have had limited success due to a lack of tools and deeper understanding of metabolic pathway regulation. The application of instationary metabolic flux analysis (INST-MFA) to photosynthetic microorganisms has allowed researchers to quantify fluxes and identify bottlenecks and metabolic inefficiencies to improve strain performance or gain insight into cellular physiology. Additionally, flux measurements can also highlight deviations between measured and predicted fluxes, revealing weaknesses in metabolic models and highlighting areas where a lack of understanding still exists. In this review, we outline the experimental steps necessary to successfully perform photosynthetic flux experiments and analysis. We also discuss the challenges unique to photosynthetic microorganisms and how to account for them, including: light supply, quenching, concentration, extraction, analysis, and flux calculation. We hope that this will enable a larger number of researchers to successfully apply isotope assisted metabolic flux analysis (13C-MFA) to their favorite photosynthetic organism.
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24
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Zinkoné TR, Gifuni I, Lavenant L, Pruvost J, Marchal L. Bead milling disruption kinetics of microalgae: Process modeling, optimization and application to biomolecules recovery from Chlorella sorokiniana. BIORESOURCE TECHNOLOGY 2018; 267:458-465. [PMID: 30036846 DOI: 10.1016/j.biortech.2018.07.080] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/13/2018] [Accepted: 07/14/2018] [Indexed: 06/08/2023]
Abstract
Industrial development of microalgae biomass valorization relies on process optimization and controlled scale-up. Both need robust modeling: (i) for biomass production and (ii) for integrated processes in the downstream processing (DSP). Cell disruption and primary fractionation are key steps in DSP. In this study, a kinetic model, including microalgal cell size distribution, was developed for Chlorella sorokiniana disruption in continuous bead milling. Glass beads of 0.4 mm size at impeller tip velocity of 14 m.s-1 were used as optimal conditions for efficient cell disruption. These conditions allowed faster disruption of big cells than small ones. A modified expression of the Stress Number, including cell size effect, was then proposed and validated. Separation of starch, proteins and chlorophyll by mild centrifugation was studied as function of the disruption parameters. Low energy consumption conditions led to extreme comminution. An intermediate zone drew attention for allowing moderate energy consumption and efficient metabolites separation by centrifugation.
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Affiliation(s)
- Téné Rosine Zinkoné
- GEPEA, UMR CNRS 6144, University of Nantes, 37 bd de l'Université, 44602 Saint Nazaire Cedex, France
| | - Imma Gifuni
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli "Federico II", Piazzale Tecchio, 80, Naples, Italy
| | | | - Jérémy Pruvost
- GEPEA, UMR CNRS 6144, University of Nantes, 37 bd de l'Université, 44602 Saint Nazaire Cedex, France
| | - Luc Marchal
- GEPEA, UMR CNRS 6144, University of Nantes, 37 bd de l'Université, 44602 Saint Nazaire Cedex, France.
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Sturme MH, Gong Y, Heinrich JM, Klok AJ, Eggink G, Wang D, Xu J, Wijffels RH. Transcriptome analysis reveals the genetic foundation for the dynamics of starch and lipid production in Ettlia oleoabundans. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.05.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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26
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de Jaeger L, Carreres BM, Springer J, Schaap PJ, Eggink G, Martins Dos Santos VAP, Wijffels RH, Martens DE. Neochloris oleoabundans is worth its salt: Transcriptomic analysis under salt and nitrogen stress. PLoS One 2018; 13:e0194834. [PMID: 29652884 PMCID: PMC5898717 DOI: 10.1371/journal.pone.0194834] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/09/2018] [Indexed: 11/19/2022] Open
Abstract
Neochloris oleoabundans is an oleaginous microalgal species that can be cultivated in fresh water as well as salt water. Using salt water gives the opportunity to reduce production costs and the fresh water footprint for large scale cultivation. Production of triacylglycerols (TAG) usually includes a biomass growth phase in nitrogen-replete conditions followed by a TAG accumulation phase under nitrogen-deplete conditions. This is the first report that provides insight in the saline resistance mechanism of a fresh water oleaginous microalgae. To better understand the osmoregulatory mechanism of N. oleoabundans during growth and TAG accumulating conditions, the transcriptome was sequenced under four different conditions: fresh water nitrogen-replete and -deplete conditions, and salt water (525 mM dissolved salts, 448mM extra NaCl) nitrogen-replete and -deplete conditions. In this study, several pathways are identified to be responsible for salt water adaptation of N. oleoabundans under both nitrogen-replete and -deplete conditions. Proline and the ascorbate-glutathione cycle seem to be of importance for successful osmoregulation in N. oleoabundans. Genes involved in Proline biosynthesis were found to be upregulated in salt water. This was supported by Nuclear magnetic resonance (NMR) spectroscopy, which indicated an increase in proline content in the salt water nitrogen-replete condition. Additionally, the lipid accumulation pathway was studied to gain insight in the gene regulation in the first 24 hours after nitrogen was depleted. Oil accumulation is increased under nitrogen-deplete conditions in a comparable way in both fresh and salt water. The mechanism behind the biosynthesis of compatible osmolytes can be used to improve N. oleoabundans and other industrially relevant microalgal strains to create a more robust and sustainable production platform for microalgae derived products in the future.
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Affiliation(s)
- Lenny de Jaeger
- Bioprocess Engineering and AlgaePARC, Wageningen University & Research, Wageningen, The Netherlands
| | - Benoit M. Carreres
- Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Wageningen, The Netherlands
| | - Jan Springer
- Food and Biobased Research and AlgaePARC, Wageningen University & Research, Wageningen, The Netherlands
| | - Peter J. Schaap
- Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Wageningen, The Netherlands
| | - Gerrit Eggink
- Bioprocess Engineering and AlgaePARC, Wageningen University & Research, Wageningen, The Netherlands
- Food and Biobased Research and AlgaePARC, Wageningen University & Research, Wageningen, The Netherlands
| | - Vitor A. P. Martins Dos Santos
- Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Wageningen, The Netherlands
- LifeGlimmer GmbH, Berlin, Germany
| | - Rene H. Wijffels
- Bioprocess Engineering and AlgaePARC, Wageningen University & Research, Wageningen, The Netherlands
- Nord University, Bodø, Norway
| | - Dirk E. Martens
- Bioprocess Engineering and AlgaePARC, Wageningen University & Research, Wageningen, The Netherlands
- * E-mail:
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27
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The impact of day length on cell division and efficiency of light use in a starchless mutant of Tetradesmus obliquus. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.02.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Production of exopolysaccharide by Botryococcus braunii CCALA 778 under laboratory simulated Mediterranean climate conditions. ALGAL RES 2018. [DOI: 10.1016/j.algal.2017.12.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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30
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Hidasi N, Belay A. Diurnal variation of various culture and biochemical parameters of Arthrospira platensis in large-scale outdoor raceway ponds. ALGAL RES 2018. [DOI: 10.1016/j.algal.2017.08.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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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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32
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Abu Hajar HA, Riefler RG, Stuart BJ. Cultivation of the microalga Neochloris oleoabundans for biofuels production and other industrial applications (a review). APPL BIOCHEM MICRO+ 2017. [DOI: 10.1134/s0003683817060096] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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‘t Lam GP, van der Kolk J, Chordia A, Vermuë MH, Olivieri G, Eppink MHM, Wijffels RH. Mild and Selective Protein Release of Cell Wall Deficient Microalgae with Pulsed Electric Field. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2017; 5:6046-6053. [PMID: 28706759 PMCID: PMC5503177 DOI: 10.1021/acssuschemeng.7b00892] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 06/08/2017] [Indexed: 05/04/2023]
Abstract
Pulsed electric field (PEF) is considered to be a very promising technology for mild cell disruption. The application of PEF for microalgae that have a rigid cell wall, however, is hampered by the presence of that rigid outer cell wall. A cell wall free mutant of C. reinhardtii was used to mimic pretreated microalgae with removed cell wall, to investigate the possibility of using PEF for protein release from microalgae. A complete release of hydrophilic proteins from the cell wall free mutants was observed whereas PEF treatment on the cell wall containing species resulted in substantially lower protein yields. Additional experiments showed that even at low energy input (0.05 kWh/kgbiomass), still about 70% of the proteins could be released with respect to bead beating as reference. These released proteins were water-soluble while the hydrophobic chlorophyll remained mainly entrapped in cell particles. SEM-analysis of these cell particles showed that PEF only opened the cells, instead of completely fragmenting them into smaller particles. These results indicate that PEF is an energy-efficient cell disruption method for selective release of water-soluble proteins, after the microalgal outer cell wall is removed. Enzymatic pretreatment to degrade the cell walls before PEF treatment was shown to be an efficient method to remove the cell wall.
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Affiliation(s)
- Gerard P. ‘t Lam
- Bioprocess
Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
- E-mail:
| | - Jelmer
A. van der Kolk
- Bioprocess
Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Akshita Chordia
- Bioprocess
Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Marian H. Vermuë
- Bioprocess
Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Giuseppe Olivieri
- Bioprocess
Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
- Dipartimento
di Ingeneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio, 80, 80125 Napoli, Italy
| | - Michel H. M. Eppink
- Bioprocess
Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - René H. Wijffels
- Bioprocess
Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
- Faculty
of Biosciences and Aquaculture, Nord University, N-8049 Bodø, Norway
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35
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León-Saiki GM, Remmers IM, Martens DE, Lamers PP, Wijffels RH, van der Veen D. The role of starch as transient energy buffer in synchronized microalgal growth in Acutodesmus obliquus. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.05.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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36
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Pulsed Electric Field for protein release of the microalgae Chlorella vulgaris and Neochloris oleoabundans. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.03.024] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Cultivation of Scenedesmus dimorphus using anaerobic digestate as a nutrient medium. Bioprocess Biosyst Eng 2017; 40:1197-1207. [DOI: 10.1007/s00449-017-1780-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 05/08/2017] [Indexed: 10/19/2022]
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38
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de Winter L, Cabanelas I, Órfão A, Vaessen E, Martens D, Wijffels R, Barbosa M. The influence of day length on circadian rhythms of Neochloris oleoabundans. ALGAL RES 2017. [DOI: 10.1016/j.algal.2016.12.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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de Winter L, Cabanelas ITD, Martens DE, Wijffels RH, Barbosa MJ. The influence of day/night cycles on biomass yield and composition of Neochloris oleoabundans. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:104. [PMID: 28439297 PMCID: PMC5401387 DOI: 10.1186/s13068-017-0762-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 03/18/2017] [Indexed: 05/08/2023]
Abstract
BACKGROUND Day/night cycles regulate the circadian clock of organisms to program daily activities. Many species of microalgae have a synchronized cell division when grown under a day/night cycle, and synchronization might influence biomass yield and composition. Therefore, the aim of this study was to study the influence of day/night cycle on biomass yield and composition of the green microalgae Neochloris oleoabundans. Hence, we compared continuous turbidostat cultures grown under continuous light with cultures grown under simulated day/night cycles. RESULTS Under day/night cycles, cultures were synchronized as cell division was scheduled in the night, whereas under continuous light cell division occurred randomly synchronized cultures were able to use the light 10-15% more efficiently than non-synchronized cultures. Our results indicate that the efficiency of light use varies over the cell cycle and that synchronized cell division provides a fitness benefit to microalgae. Biomass composition under day/night cycles was similar to continuous light, with the exception of starch content. The starch content was higher in cultures under continuous light, most likely because the cells never had to respire starch to cover for maintenance during dark periods. Day/night cycles were provided in a 'block' (continuous light intensity during the light period) and in a 'sine' (using a sine function to simulate light intensities from sunrise to sunset). There were no differences in biomass yield or composition between these two ways of providing light (in a 'block' or in a 'sine'). CONCLUSIONS The biomass yield and composition of N. oleoabundans were influenced by day/night cycles. These results are important to better understand the relations between research done under continuous light conditions and with day/night cycle conditions. Our findings also imply that more research should be done under day/night cycles.
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Affiliation(s)
- Lenneke de Winter
- Bioprocess Engineering, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
- Wetsus-Center of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900 CC Leeuwarden, The Netherlands
| | | | - Dirk E. Martens
- Bioprocess Engineering, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - René H. Wijffels
- Bioprocess Engineering, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - Maria J. Barbosa
- Bioprocess Engineering, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
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40
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Blanken W, Magalhães A, Sebestyén P, Rinzema A, Wijffels RH, Janssen M. Microalgal biofilm growth under day-night cycles. ALGAL RES 2017. [DOI: 10.1016/j.algal.2016.11.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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41
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Baldisserotto C, Popovich C, Giovanardi M, Sabia A, Ferroni L, Constenla D, Leonardi P, Pancaldi S. Photosynthetic aspects and lipid profiles in the mixotrophic alga Neochloris oleoabundans as useful parameters for biodiesel production. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.03.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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43
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Fachet M, Hermsdorf D, Rihko-Struckmann L, Sundmacher K. Flow cytometry enables dynamic tracking of algal stress response: A case study using carotenogenesis in Dunaliella salina. ALGAL RES 2016. [DOI: 10.1016/j.algal.2015.11.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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44
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't Lam GP, Zegeye EK, Vermuë MH, Kleinegris DMM, Eppink MHM, Wijffels RH, Olivieri G. Dosage effect of cationic polymers on the flocculation efficiency of the marine microalga Neochloris oleoabundans. BIORESOURCE TECHNOLOGY 2015; 198:797-802. [PMID: 26454366 DOI: 10.1016/j.biortech.2015.09.097] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 09/21/2015] [Accepted: 09/22/2015] [Indexed: 05/03/2023]
Abstract
A mechanistic mathematical model was developed to predict the performance of cationic polymers for flocculating salt water cultivated microalgae. The model was validated on experiments carried out with Neochloris oleoabundans and three different commercial flocculants (Zetag 7557®, Synthofloc 5080H® and SNF H536®). For a wide range of biomass concentrations (0.49-1.37 g L(-1)) and flocculant dosages (0-150 mg L(-1)) the model simulations predicted well the optimal flocculant-to-biomass ratio between 43 and 109 mgflocculant/gbiomass. At optimum conditions biomass recoveries varied between 88% and 99%. The cost of the usage of commercial available flocculants is estimated to range between 0.15$/kgbiomass and 0.49$/kgbiomass.
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Affiliation(s)
- G P 't Lam
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands.
| | - E K Zegeye
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - M H Vermuë
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - D M M Kleinegris
- Wageningen UR, Food & Biobased Research, AlgaePARC, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - M H M Eppink
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - R H Wijffels
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands; University of Nordland, Faculty of Biosciences and Aquaculture, N-8049 Bodø, Norway
| | - G Olivieri
- Bioprocess Engineering, AlgaePARC, Wageningen University, P.O. Box 16, 6700 AA Wageningen, The Netherlands
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45
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Vitova M, Bisova K, Kawano S, Zachleder V. Accumulation of energy reserves in algae: From cell cycles to biotechnological applications. Biotechnol Adv 2015; 33:1204-18. [DOI: 10.1016/j.biotechadv.2015.04.012] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 04/27/2015] [Accepted: 04/28/2015] [Indexed: 01/28/2023]
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46
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Light attenuates lipid accumulation while enhancing cell proliferation and starch synthesis in the glucose-fed oleaginous microalga Chlorella zofingiensis. Sci Rep 2015; 5:14936. [PMID: 26442783 PMCID: PMC4595723 DOI: 10.1038/srep14936] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 09/14/2015] [Indexed: 01/08/2023] Open
Abstract
The objective of this study was to investigate the effect of light on lipid and starch accumulation in the oleaginous green algae Chlorella zofingiensis supplemented with glucose. C. zofingiensis, when fed with 30 g/L glucose, synthesized lipids up to 0.531 g/g dry weight; while in the presence of light, the lipid content dropped down to 0.352 g/g dry weight. Lipid yield on glucose was 0.184 g/g glucose, 14% higher than that cultured with light. The light-mediated lipid reduction was accompanied by the down-regulation of fatty acid biosynthetic genes at the transcriptional level. Furthermore, light promoted cell proliferation, starch accumulation, and the starch yield based on glucose. Taken together, light may attenuate lipid accumulation, possibly through the inhibition of lipid biosynthetic pathway, leading to more carbon flux from glucose to starch. This study reveals the dual effects of light on the sugar-fed C. zofingiensis and provides valuable insights into the possible optimization of algal biomass and lipid production by manipulation of culture conditions.
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Willamme R, Alsafra Z, Arumugam R, Eppe G, Remacle F, Levine RD, Remacle C. Metabolomic analysis of the green microalga Chlamydomonas reinhardtii cultivated under day/night conditions. J Biotechnol 2015; 215:20-6. [PMID: 25941156 DOI: 10.1016/j.jbiotec.2015.04.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 04/07/2015] [Accepted: 04/10/2015] [Indexed: 12/14/2022]
Abstract
Biomass composition of Chlamydomonas reinhardtii was studied during two consecutive cycles of 12h light/12h dark. As in our experimental conditions the two synchronized divisions were separated by 20h, it was possible to show that accumulation of dry weight, proteins, chlorophyll and fatty acids mainly depends on cell division, whereas starch accumulation depends on a circadian rhythm as reported previously. Our metabolomics analyses also revealed that accumulation of five (Ser, Val, Leu, Ile and Thr) of the nine free amino acids detected displayed rhythmicity, depending on cell division while Glu was 20-50 times more abundant than the other ones probably because this free amino acid serves not only for protein synthesis but also for biosynthesis of nitrogen compounds. In addition, we performed a thermodynamic-motivated theoretical approach known as 'surprisal analysis'. The results from this analysis showed that cells were close to a steady state all along the 48h of the experiment. In addition, calculation of free energy of cellular metabolites showed that the transition point, i.e. the state which immediately precedes cell division, corresponds to the most unstable stage of the cell cycle and that division is identified as the greatest drop in the free energy of metabolites.
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Affiliation(s)
- Rémi Willamme
- Genetics and Physiology of Microalgae, Institute of Botany, B22, University of Liège, Belgium
| | - Zouheir Alsafra
- Centre of Analytical Research and Technology (CART) - LSM/Inorganic Analytical Chemistry, Department of Chemistry, B6C, University of Liège, Belgium
| | - Rameshkumar Arumugam
- The Fritz Haber Research Center for Molecular Dynamics, Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Gauthier Eppe
- Centre of Analytical Research and Technology (CART) - LSM/Inorganic Analytical Chemistry, Department of Chemistry, B6C, University of Liège, Belgium
| | - Françoise Remacle
- The Fritz Haber Research Center for Molecular Dynamics, Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem 91904, Israel; Theoretical Physical Chemistry, Department of Chemistry, B6C, University of Liège, Belgium
| | - R D Levine
- The Fritz Haber Research Center for Molecular Dynamics, Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem 91904, Israel; Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Claire Remacle
- Genetics and Physiology of Microalgae, Institute of Botany, B22, University of Liège, Belgium.
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Mulders KJM, Lamers PP, Wijffels RH, Martens DE. Dynamics of biomass composition and growth during recovery of nitrogen-starved Chromochloris zofingiensis. Appl Microbiol Biotechnol 2014; 99:1873-84. [DOI: 10.1007/s00253-014-6181-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 10/02/2014] [Accepted: 10/18/2014] [Indexed: 12/28/2022]
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49
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Effect of cooling in the night on the productivity and biochemical composition of Tetraselmis suecica. ALGAL RES 2014. [DOI: 10.1016/j.algal.2014.11.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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de Winter L, Schepers LW, Cuaresma M, Barbosa MJ, Martens DE, Wijffels RH. Circadian rhythms in the cell cycle and biomass composition of Neochloris oleoabundans under nitrogen limitation. J Biotechnol 2014; 187:25-33. [DOI: 10.1016/j.jbiotec.2014.07.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 06/09/2014] [Accepted: 07/15/2014] [Indexed: 10/25/2022]
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