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Song P, Ma N, Dong S, Qiao H, Zhang J, Guan B, Tong S, Zhao Y. Enhancing Acetate Utilization in Phaeodactylum tricornutum through the Introduction of Acetate Transport Protein. Biomolecules 2024; 14:822. [PMID: 39062536 PMCID: PMC11274376 DOI: 10.3390/biom14070822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/04/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024] Open
Abstract
The diatom Phaeodactylum tricornutum, known for its high triacylglycerol (TAG) content and significant levels of n-3 long chain polyunsaturated fatty acids (LC-PUFAs), such as eicosapentaenoic acid (EPA), has a limited ability to utilize exogenous organic matter. This study investigates the enhancement of acetate utilization in P. tricornutum by introducing an exogenous acetate transport protein. The acetate transporter gene ADY2 from Saccharomyces cerevisiae endowed the organism with the capability to assimilate acetate and accelerating its growth. The transformants exhibited superior growth rates at an optimal NaAc concentration of 0.01 M, with a 1.7- to 2.0-fold increase compared to the wild-type. The analysis of pigments and photosynthetic activities demonstrated a decline in photosynthetic efficiency and maximum electron transport rate. This decline is speculated to result from the over-reduction of the electron transport components between photosystems due to acetate utilization. Furthermore, the study assessed the impact of acetate on the crude lipid content and fatty acid composition, revealing an increase in the crude lipid content and alterations in fatty acid profiles, particularly an increase in C16:1n-7 at the expense of EPA and a decrease in the unsaturation index. The findings provide insights into guiding the biomass and biologically active products production of P. tricornutum through metabolic engineering.
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Affiliation(s)
- Pu Song
- School of Life Sciences, Ludong University, Yantai 264025, China; (P.S.); (N.M.); (S.D.); (J.Z.); (S.T.); (Y.Z.)
| | - Ning Ma
- School of Life Sciences, Ludong University, Yantai 264025, China; (P.S.); (N.M.); (S.D.); (J.Z.); (S.T.); (Y.Z.)
| | - Shaokun Dong
- School of Life Sciences, Ludong University, Yantai 264025, China; (P.S.); (N.M.); (S.D.); (J.Z.); (S.T.); (Y.Z.)
| | - Hongjin Qiao
- School of Life Sciences, Ludong University, Yantai 264025, China; (P.S.); (N.M.); (S.D.); (J.Z.); (S.T.); (Y.Z.)
| | - Jumei Zhang
- School of Life Sciences, Ludong University, Yantai 264025, China; (P.S.); (N.M.); (S.D.); (J.Z.); (S.T.); (Y.Z.)
| | - Bo Guan
- School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China;
| | - Shanying Tong
- School of Life Sciences, Ludong University, Yantai 264025, China; (P.S.); (N.M.); (S.D.); (J.Z.); (S.T.); (Y.Z.)
| | - Yancui Zhao
- School of Life Sciences, Ludong University, Yantai 264025, China; (P.S.); (N.M.); (S.D.); (J.Z.); (S.T.); (Y.Z.)
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Puzanskiy RK, Romanyuk DA, Kirpichnikova AA, Shishova MF. Effects of Trophic Acclimation on Growth and Expression Profiles of Genes Encoding Enzymes of Primary Metabolism and Plastid Transporters of Chlamydomonas reinhardtii. Life (Basel) 2023; 13:1398. [PMID: 37374180 DOI: 10.3390/life13061398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/28/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
In this paper, the effect of prolonged trophic acclimation on the subsequent growth of Chlamydomonas reinhardtii batch cultures was studied. The mixotrophic (light + acetate) acclimation stimulated subsequent growth at both mixotrophy and autotrophy conditions and altered the expression profile of genes encoding enzymes of primary metabolism and plastid transporters. Besides the trophic effect, the influence of Chlamydomonas culture growth stage on gene expression was determined. Under mixotrophic conditions, this effect was most pronounced in the first half of the exponential growth with partial retention of the previous acclimation period traits. The autotrophy acclimation effect was more complex and its significance was enhanced at the end of the growth and in the stationary phase.
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Affiliation(s)
- Roman K Puzanskiy
- Laboratory of Analytical Phytochemistry, Komarov Botanical Institute of the Russian Academy of Sciences, St. Petersburg 197022, Russia
- Faculty of Biology, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Daria A Romanyuk
- Department of Biotechnology, All-Russia Research Institute for Agricultural Microbiology, Pushkin, St. Petersburg 196608, Russia
| | | | - Maria F Shishova
- Faculty of Biology, St. Petersburg State University, St. Petersburg 199034, Russia
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Rhie MN, Hong K, Lee T. Effects of the induction of anoxia in photobioreactor on effective cultivation of Scenedesmus acuminatus under mixotrophic cultivation mode. ENVIRONMENTAL TECHNOLOGY 2022; 43:2359-2379. [PMID: 33475031 DOI: 10.1080/09593330.2021.1880487] [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: 05/08/2020] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
The purpose of this study was to investigate the optimum conditions of several factors (i.e. types and concentration of acetate, aeration rate, pH control) for maximizing the mixotrophic cultivation of Scenedesmus acuminatus using acetate as an organic carbon source. When acetate was used, dissolved oxygen (DO) was quickly consumed and resulted in an anoxic condition for 52 h. Then, DO increased quickly by photosynthetic reaction. Whenever we put acetate in a reactor after DO was recovered to higher than 7 mg/L, cells were quickly grown via cell respiration, which subsequently resulted in an anoxic condition. Compared to aeration, ammonium acetate, ammonium acetate with aeration tests, the highest maximum biomass productivity of 0.73 g/L/d was obtained for pH control test with ammonium acetate dosage. From this study, we found that DO was essential for the fast assimilation of acetate and depleted DO was quickly regenerated for pH control test. From this fact, we found that pH control test with ammonium acetate dosage was the best cultivation method for Scenedesmus acuminatus under mixotrophic condition. These findings could be a useful reference for maximizing the cultivation of S. acuminatus in industrial-scale applications.
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Affiliation(s)
- Mi Na Rhie
- Department of Environmental Engineering, Pukyong National University, Busan, Republic of Korea
- National Fishery Products Quality Service, Busan, Republic of Korea
| | - Kai Hong
- Department of Environmental Engineering, Pukyong National University, Busan, Republic of Korea
| | - Taeyoon Lee
- Department of Environmental Engineering, Pukyong National University, Busan, Republic of Korea
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Lacroux J, Trably E, Bernet N, Steyer JP, van Lis R. Mixotrophic growth of microalgae on volatile fatty acids is determined by their undissociated form. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101870] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Xie X, Huang A, Gu W, Zang Z, Pan G, Gao S, He L, Zhang B, Niu J, Lin A, Wang G. Photorespiration participates in the assimilation of acetate in Chlorella sorokiniana under high light. THE NEW PHYTOLOGIST 2016; 209:987-998. [PMID: 26439434 DOI: 10.1111/nph.13659] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 08/17/2015] [Indexed: 06/05/2023]
Abstract
The development of microalgae on an industrial scale largely depends on the economic feasibility of mass production. High light induces productive suspensions during cultivation in a tubular photobioreactor. Herein, we report that high light, which inhibited the growth of Chlorella sorokiniana under autotrophic conditions, enhanced the growth of this alga in the presence of acetate. We compared pigments, proteomics and the metabolic flux ratio in C. sorokiniana cultivated under high light (HL) and under low light (LL) in the presence of acetate. Our results showed that high light induced the synthesis of xanthophyll and suppressed the synthesis of chlorophylls. Acetate in the medium was exhausted much more rapidly in HL than in LL. The data obtained from LC-MS/MS indicated that high light enhanced photorespiration, the Calvin cycle and the glyoxylate cycle of mixotrophic C. sorokiniana. The results of metabolic flux ratio analysis showed that the majority of the assimilated carbon derived from supplemented acetate, and photorespiratory glyoxylate could enter the glyoxylate cycle. Based on these data, we conclude that photorespiration provides glyoxylate to speed up the glyoxylate cycle, and releases acetate-derived CO2 for the Calvin cycle. Thus, photorespiration connects the glyoxylate cycle and the Calvin cycle, and participates in the assimilation of supplemented acetate in C. sorokiniana under high light.
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Affiliation(s)
- Xiujun Xie
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
- Tianjin Key Laboratory of Marine Resources and Chemistry, College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Aiyou Huang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Wenhui Gu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Zhengrong Zang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Guanghua Pan
- Tianjin Key Laboratory of Marine Resources and Chemistry, College of Marine Science and Engineering, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Shan Gao
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Linwen He
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Baoyu Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Jianfeng Niu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Apeng Lin
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Guangce Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
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Turon V, Trably E, Fouilland E, Steyer JP. Growth of Chlorella sorokiniana on a mixture of volatile fatty acids: The effects of light and temperature. BIORESOURCE TECHNOLOGY 2015; 198:852-860. [PMID: 26461792 DOI: 10.1016/j.biortech.2015.10.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 09/30/2015] [Accepted: 10/01/2015] [Indexed: 06/05/2023]
Abstract
This study investigated the influence of light and temperature on Chlorella sorokiniana grown on a mixture of acetate and butyrate, two of the volatile fatty acids produced by dark fermentation. Exposure to light caused autotrophic biomass production (56% of the final biomass) and reduced the time to reach butyrate exhaustion to 7 days at 25°C from 10 days in the dark. For growth on acetate at the optimum temperature (35°C), the presence of butyrate reduced the growth rate (by 46%) and the carbon yield (by 36%). For successful microalgae growth on dark fermentation effluent, butyrate inhibition may be reduced by setting the temperature to 30°C and providing light.
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Affiliation(s)
- V Turon
- INRA, UR0050 Laboratoire de Biotechnologie de l'Environnement, F-11100 Narbonne, France
| | - E Trably
- INRA, UR0050 Laboratoire de Biotechnologie de l'Environnement, F-11100 Narbonne, France
| | - E Fouilland
- Marine Biodiversity, Exploitation and Conservation - UMR 9190 MARBEC, CNRS, UM, IFREMER, IRD, Station Marine, Université de Montpellier, 2 Rue des Chantiers, 34200 Sète, France.
| | - J-P Steyer
- INRA, UR0050 Laboratoire de Biotechnologie de l'Environnement, F-11100 Narbonne, France
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Ren HY, Liu BF, Kong F, Zhao L, Ren N. Hydrogen and lipid production from starch wastewater by co-culture of anaerobic sludge and oleaginous microalgae with simultaneous COD, nitrogen and phosphorus removal. WATER RESEARCH 2015; 85:404-12. [PMID: 26364224 DOI: 10.1016/j.watres.2015.08.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 08/12/2015] [Accepted: 08/30/2015] [Indexed: 05/07/2023]
Abstract
Anaerobic sludge (AS) and microalgae were co-cultured to enhance the energy conversion and nutrients removal from starch wastewater. Mixed ratio, starch concentration and initial pH played critical roles on the hydrogen and lipid production of the co-culture system. The maximum hydrogen production of 1508.3 mL L(-1) and total lipid concentration of 0.36 g L(-1) were obtained under the optimized mixed ratio (algae:AS) of 30:1, starch concentration of 6 g L(-1) and initial pH of 8. The main soluble metabolites in dark fermentation were acetate and butyrate, most of which can be consumed in co-cultivation. When sweet potato starch wastewater was used as the substrate, the highest COD, TN and TP removal and energy conversion efficiencies reached 80.5%, 88.7%, 80.1% and 34.2%, which were 176%, 178%, 200% and 119% higher than that of the control group (dark fermentation), respectively. This research provided a novel approach and achieved efficient simultaneous energy recovery and nutrients removal from starch wastewater by the co-culture system.
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Affiliation(s)
- Hong-Yu Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Bing-Feng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Fanying Kong
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Lei Zhao
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
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Matsudo MC, Moraes FA, Bezerra RP, Arashiro RE, Sato S, Carvalho JCM. Use of acetate in fed-batch mixotrophic cultivation of Arthrospira platensis. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-1011-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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