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Rollin S, Gupta A, Franco CMM, Singh S, Puri M. Development of sustainable downstream processing for nutritional oil production. Front Bioeng Biotechnol 2023; 11:1227889. [PMID: 37885455 PMCID: PMC10598382 DOI: 10.3389/fbioe.2023.1227889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 09/26/2023] [Indexed: 10/28/2023] Open
Abstract
Nutritional oils (mainly omega-3 fatty acids) are receiving increased attention as critical supplementary compounds for the improvement and maintenance of human health and wellbeing. However, the predominant sources of these oils have historically shown numerous limitations relating to desirability and sustainability; hence the crucial focus is now on developing smarter, greener, and more environmentally favourable alternatives. This study was undertaken to consider and assess the numerous prevailing and emerging techniques implicated across the stages of fatty acid downstream processing. A structured and critical comparison of the major classes of disruption methodology (physical, chemical, thermal, and biological) is presented, with discussion and consideration of the viability of new extraction techniques. Owing to a greater desire for sustainable industrial practices, and a desperate need to make nutritional oils more available; great emphasis has been placed on the discovery and adoption of highly sought-after 'green' alternatives, which demonstrate improved efficiency and reduced toxicity compared to conventional practices. Based on these findings, this review also advocates new forays into application of novel nanomaterials in fatty acid separation to improve the sustainability of nutritional oil downstream processing. In summary, this review provides a detailed overview of the current and developing landscape of nutritional oil; and concludes that adoption and refinement of these sustainable alternatives could promptly allow for development of a more complete 'green' process for nutritional oil extraction; allowing us to better meet worldwide needs without costing the environment.
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Affiliation(s)
- Samuel Rollin
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Adarsha Gupta
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Christopher M. M. Franco
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | | | - Munish Puri
- Medical Biotechnology, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
- Flinders Health and Medical Research Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
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2
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Bai M, Sen B, Wen S, Ye H, He Y, Zhang X, Wang G. Culturable Diversity of Thraustochytrids from Coastal Waters of Qingdao and Their Fatty Acids. Mar Drugs 2022; 20:md20040229. [PMID: 35447902 PMCID: PMC9029807 DOI: 10.3390/md20040229] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 02/05/2023] Open
Abstract
Thraustochytrids have gained significant attention in recent years because of their considerable ecological and biotechnological importance. Yet, the influence of seasons and habitats on their culturable diversity and lipid profile remains poorly described. In this study, a total of 58 thraustochytrid strains were isolated from the coastal waters of Qingdao, China. These strains were phylogenetically close to five thraustochytrid genera, namely Botryochytrium, Oblongichytrium, Schizochytrium, Thraustochytrium, and Sicyoidochytrium. Most of the isolated strains were classified into the genera Thraustochytrium and Oblongichytrium. Further diversity analysis revealed that samples collected from nutrient-rich habitats and during summer/fall yielded significantly higher culturable diversity of thraustochytrids than those from low-nutrient habitats and winter/spring. Moreover, sampling habitats and seasons significantly impacted the fatty acid profiles of the strains. Particularly, the Oblongichytrium sp. OC931 strain produced a significant amount (153.99 mg/L) of eicosapentaenoic acid (EPA), accounting for 9.12% of the total fatty acids, which was significantly higher than that of the previously reported Aurantiochytrium strains. Overall, the results of this study fill the gap in our current understanding of the culturable diversity of thraustochytrids in the coastal waters and the impact of the sampling habitats and seasons on their capacity for lipid accumulation.
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Affiliation(s)
- Mohan Bai
- College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou 310058, China;
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (B.S.); (S.W.); (H.Y.); (Y.H.)
| | - Biswarup Sen
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (B.S.); (S.W.); (H.Y.); (Y.H.)
| | - Shuai Wen
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (B.S.); (S.W.); (H.Y.); (Y.H.)
| | - Huike Ye
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (B.S.); (S.W.); (H.Y.); (Y.H.)
| | - Yaodong He
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (B.S.); (S.W.); (H.Y.); (Y.H.)
| | - Xiaobo Zhang
- College of Life Sciences, Zijingang Campus, Zhejiang University, Hangzhou 310058, China;
- Correspondence: (X.Z.); (G.W.)
| | - Guangyi Wang
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (B.S.); (S.W.); (H.Y.); (Y.H.)
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Center for Biosafety Research and Strategy, Tianjin University, Tianjin 300072, China
- Correspondence: (X.Z.); (G.W.)
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3
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Jia YL, Geng SS, Du F, Xu YS, Wang LR, Sun XM, Wang QZ, Li Q. Progress of metabolic engineering for the production of eicosapentaenoic acid. Crit Rev Biotechnol 2021; 42:838-855. [PMID: 34779326 DOI: 10.1080/07388551.2021.1971621] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Eicosapentaenoic Acid (EPA) is an essential ω-3 polyunsaturated fatty acid for human health. Currently, high-quality EPA production is largely dependent on the extraction of fish oil, but this unsustainable approach cannot meet its rising market demand. Biotechnological approaches for EPA production from microorganisms have received increasing attention due to their suitability for large-scale production and independence of the seasonal or climate restrictions. This review summarizes recent research on different microorganisms capable of producing EPA, such as microalgae, bacteria, and fungi, and introduces the different EPA biosynthesis pathways. Notably, some novel engineering strategies have been applied to endow and improve the abilities of microorganisms to synthesize EPA, including the construction and optimization of the EPA biosynthesis pathway, an increase in the acetyl-CoA pool supply, the increase of NADPH and the inhibition of competing pathways. This review aims to provide an updated summary of EPA production.
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Affiliation(s)
- Yu-Lei Jia
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, People's Republic of China
| | - Shan-Shan Geng
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, People's Republic of China
| | - Fei Du
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, People's Republic of China
| | - Ying-Shuang Xu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, People's Republic of China
| | - Ling-Ru Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, People's Republic of China
| | - Xiao-Man Sun
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, People's Republic of China
| | - Qing-Zhuo Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, People's Republic of China
| | - Qi Li
- College of Life Sciences, Sichuan Normal University, Chengdu, People's Republic of China
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4
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Colonia BSO, de Melo Pereira GV, Mendonça Rodrigues F, de Souza Miranda Muynarsk E, da Silva Vale A, Cesar de Carvalho J, Thomaz Soccol V, de Oliveira Penha R, Ricardo Soccol C. Integrating metagenetics and high-throughput screening for bioprospecting marine thraustochytrids producers of long-chain polyunsaturated fatty acids. BIORESOURCE TECHNOLOGY 2021; 333:125176. [PMID: 33894449 DOI: 10.1016/j.biortech.2021.125176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/08/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
Omega-3 produced by marine thraustochytrids has appeared as an alternative to fish oil and an eco-friendly solution to overfishing. Herein, an integrative analysis of metagenetics and high-throughput screening was used for bioprospecting marine thraustochytrids from southern Brazil mangrove and coastal seawater. All sampled environments showed biodiversity and abundance of SAR clade. Environmental samples detected with potential lipid-accumulating labyrinthulomycetes were further processed for direct plating and pollen baiting isolation. Microtiter plate system and fluorescence spectroscopy were combined for high-throughput screening of 319 isolates to accumulate lipids. Twenty isolates were selected for submerged cultivation and lipid characterization. Among them, B36 isolate, identified as Aurantiochytrium sp. by 18s rRNA sequencing, achieved the highest biomass (25.60 g/l CDW) and lipids (17.12 g/l CDW). This lipid content had a high biological value with 44.37% LC-PUFAs and 34.6% DHA, which can be used as a sustainable source in vegan, seafood-free and animal feed diets.
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Affiliation(s)
| | | | - Felipe Mendonça Rodrigues
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), 81531-970 Curitiba, PR, Brazil
| | | | - Alexander da Silva Vale
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), 81531-970 Curitiba, PR, Brazil
| | - Júlio Cesar de Carvalho
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), 81531-970 Curitiba, PR, Brazil
| | - Vanete Thomaz Soccol
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), 81531-970 Curitiba, PR, Brazil
| | - Rafaela de Oliveira Penha
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), 81531-970 Curitiba, PR, Brazil
| | - Carlos Ricardo Soccol
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), 81531-970 Curitiba, PR, Brazil.
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5
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Bagul VP, Annapure US. Isolation of fast-growing thraustochytrids and seasonal variation on the fatty acid composition of thraustochytrids from mangrove regions of Navi Mumbai, India. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 290:112597. [PMID: 33878627 DOI: 10.1016/j.jenvman.2021.112597] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/07/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
This study was aimed to isolate fast-growing thraustochytrids and the influence of seasonal variation in fatty acid composition from the mangrove habitat. The thraustochytrids were isolated from fallen yellowish or green mangrove leaves, in four seasons, including winter, summer, rainy, and post rainy season in one year. The thraustochytrids were analyzed for biomass production, total lipid content, and fatty acid profile. The thraustochytrid isolates showed biomass yield and total lipid content in the range of 14.12 ± 0.69 to 22.98 ± 0.53 g/L and 34.98-58.86% per dry cell weight, respectively. The isolates showed two dominant fatty acids, palmitic acid (PA) as saturated fatty acid (SFA) and docosahexaenoic acid (DHA) as long-chain polyunsaturated fatty acids (LC-PUFA) in total fatty acid (TFA) content. The significant differences (P < 0.05) were observed for seasonal variations in SFA and DHA content in summer isolates and winter isolates. The maximum DHA content with 47.12% of TFA, recorded in winter (January) isolates and summer (April) isolates with SFA 68.82% of TFA. The results from this study were verified the hypothesis that the presence of high DHA producing thraustochytrids in lower temperature season in the same habitat. These findings have also emphasized the role of the environmental temperature conditions and the importance of thraustochytrid fatty acid composition as a dietary biomarker. Also, it revealed the ecological significance of thraustochytrid in DHA enrichment in the food web of the marine ecosystem. These findings could be useful while isolating thraustochytrids according to seasons for industrial application for omega 3 fatty acids and biodiesel production.
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Affiliation(s)
- Vaishali P Bagul
- Department of Food Engineering and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai, 400019, India
| | - Uday S Annapure
- Department of Food Engineering and Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai, 400019, India.
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6
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Lyu L, Wang Q, Wang G. Cultivation and diversity analysis of novel marine thraustochytrids. MARINE LIFE SCIENCE & TECHNOLOGY 2021; 3:263-275. [PMID: 37073337 PMCID: PMC10077191 DOI: 10.1007/s42995-020-00069-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 07/23/2020] [Indexed: 05/03/2023]
Abstract
Thraustochytrids are a group of unicellular marine heterotrophic protists, and have long been known for their biotechnological potentials in producing squalene, polyunsaturated fatty acids (PUFAs) and other bioactive products. There are less than a hundred known strains from diverse marine habitats. Therefore, the discovery of new strains from natural environments is still one of the major limitations for fully exploring this interesting group of marine protists. At present, numerous attempts have been made to study thraustochytrids, mainly focusing on isolating new strains, analyzing the diversity in specific marine habitats, and increasing the yield of bioactive substances. There is a lack of a systematic study of the culturable diversity, and cultivation strategies. This paper reviews the distribution and diversity of culturable thraustochytrids from a range of marine environments, and describes in detail the most commonly used isolation methods and the control of culture parameters. Furthermore, the perspective approaches of isolation and cultivation for the discovery of new strains are discussed. Finally, the future directions of novel marine thraustochytrid research are proposed. The ultimate goal is to promote the awareness of biotechnological potentials of culturable thraustochytrid strains in industrial and biomedical applications.
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Affiliation(s)
- Lu Lyu
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072 China
| | - Qiuzhen Wang
- Ocean College of Hebei Agricultural University, Qinhuangdao, 066000 China
| | - Guangyi Wang
- Center for Marine Environmental Ecology, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072 China
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7
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Paredes P, Larama G, Flores L, Leyton A, Ili CG, Asenjo JA, Chisti Y, Shene C. Temperature Differentially Affects Gene Expression in Antarctic Thraustochytrid Oblongichytrium sp. RT2316-13. Mar Drugs 2020; 18:md18110563. [PMID: 33217919 PMCID: PMC7698632 DOI: 10.3390/md18110563] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/08/2020] [Accepted: 11/11/2020] [Indexed: 01/17/2023] Open
Abstract
Oblongichytrium RT2316-13 synthesizes lipids rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). The content of these fatty acids in the total lipids depended on growth temperature. Sequencing technology was used in this work to examine the thraustochytrid's response to a decrease in growth temperature from 15 °C to 5 °C. Around 4% (2944) of the genes were differentially expressed (DE) and only a few of the DE genes (533 upregulated; 206 downregulated) had significant matches to those in the SwissProt database. Most of the annotated DE genes were related to cell membrane composition (fatty acids, sterols, phosphatidylinositol), the membrane enzymes linked to cell energetics, and membrane structure (cytoskeletal proteins and enzymes). In RT2316-13, the synthesis of long-chain polyunsaturated fatty acids occurred through ω3- and ω6-pathways. Enzymes of the alternative pathways (Δ8-desaturase and Δ9-elongase) were also expressed. The upregulation of the genes coding for a Δ5-desaturase and a Δ5-elongase involved in the synthesis of EPA and DHA, explained the enrichment of total lipid with these two long-chain fatty acids at the low temperature. This molecular response has the potential to be used for producing microbial lipids with a fatty acids profile similar to that of fish oils.
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Affiliation(s)
- Paris Paredes
- Department of Chemical Engineering, Center of Food Biotechnology and Bioseparations, BIOREN, and Centre of Biotechnology and Bioengineering (CeBiB), Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco 4780000, Chile; (P.P.); (L.F.); (A.L.)
| | - Giovanni Larama
- Centro de Modelación y Computación Científica, Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco 4780000, Chile;
| | - Liset Flores
- Department of Chemical Engineering, Center of Food Biotechnology and Bioseparations, BIOREN, and Centre of Biotechnology and Bioengineering (CeBiB), Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco 4780000, Chile; (P.P.); (L.F.); (A.L.)
| | - Allison Leyton
- Department of Chemical Engineering, Center of Food Biotechnology and Bioseparations, BIOREN, and Centre of Biotechnology and Bioengineering (CeBiB), Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco 4780000, Chile; (P.P.); (L.F.); (A.L.)
| | - Carmen Gloria Ili
- Centro de Excelencia en Medicina Traslacional—Scientific and Technological Bioresource Nucleus (CEMT-BIOREN), Universidad de La Frontera, Av. Alemania 0478, Temuco 4810296, Chile;
| | - Juan A. Asenjo
- Centre for Biotechnology and Bioengineering (CeBiB), Department of Chemical Engineering and Biotechnology, Universidad de Chile, Beauchef 851, Santiago 8370459, Chile;
| | - Yusuf Chisti
- School of Engineering, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand;
| | - Carolina Shene
- Department of Chemical Engineering, Center of Food Biotechnology and Bioseparations, BIOREN, and Centre of Biotechnology and Bioengineering (CeBiB), Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco 4780000, Chile; (P.P.); (L.F.); (A.L.)
- Correspondence: ; Tel.: +56-45-232-5491
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Nham Tran TL, Miranda AF, Mouradov A, Adhikari B. Physicochemical Characteristics of Protein Isolated from Thraustochytrid Oilcake. Foods 2020; 9:foods9060779. [PMID: 32545411 PMCID: PMC7353575 DOI: 10.3390/foods9060779] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 05/31/2020] [Accepted: 06/08/2020] [Indexed: 01/30/2023] Open
Abstract
The oil from thraustochytrids, unicellular heterotrophic marine protists, is increasingly used in the food and biotechnological industries as it is rich in omega-3 fatty acids, squalene and a broad spectrum of carotenoids. This study showed that the oilcake, a by-product of oil extraction, is equally valuable as it contained 38% protein/dry mass, and thraustochytrid protein isolate can be obtained with 92% protein content and recovered with 70% efficiency. The highest and lowest solubilities of proteins were observed at pH 12.0 and 4.0, respectively, the latter being its isoelectric point. Aspartic acid, glutamic acid, histidine, and arginine were the most abundant amino acids in proteins. The arginine-to-lysine ratio was higher than one, which is desired in heart-healthy foods. The denaturation temperature of proteins ranged from 167.8–174.5 °C, indicating its high thermal stability. Proteins also showed high emulsion activity (784.1 m2/g) and emulsion stability (209.9 min) indices. The extracted omega-3-rich oil melted in the range of 30–34.6 °C and remained stable up to 163–213 °C. This study shows that thraustochytrids are not only a valuable source of omega 3-, squalene- and carotenoid-containing oils, but are also rich in high-value protein with characteristics similar to those from oilseeds.
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Affiliation(s)
- Thi Linh Nham Tran
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
- Faculty of Agriculture Bac Lieu University, 8 wards, Bac Lieu 960000, Vietnam
| | - Ana F. Miranda
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
| | - Aidyn Mouradov
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
- Correspondence: ; Tel.: +61-3-99257144
| | - Benu Adhikari
- School of Science, RMIT University, Bundoora Campus, Melbourne, VIC 3083, Australia; (T.L.N.T.); (A.F.M.); (B.A.)
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Miranda AF, Nham Tran TL, Abramov T, Jehalee F, Miglani M, Liu Z, Rochfort S, Gupta A, Cheirsilp B, Adhikari B, Puri M, Mouradov A. Marine Protists and Rhodotorula Yeast as Bio-Convertors of Marine Waste into Nutrient-Rich Deposits for Mangrove Ecosystems. Protist 2020; 171:125738. [PMID: 32544845 DOI: 10.1016/j.protis.2020.125738] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 04/15/2020] [Accepted: 04/22/2020] [Indexed: 01/27/2023]
Abstract
This paper represents a comprehensive study of two new thraustochytrids and a marine Rhodotorula red yeast isolated from Australian coastal waters for their abilities to be a potential renewable feedstock for the nutraceutical, food, fishery and bioenergy industries. Mixotrophic growth of these species was assessed in the presence of different carbon sources: glycerol, glucose, fructose, galactose, xylose, and sucrose, starch, cellulose, malt extract, and potato peels. Up to 14g DW/L (4.6gDW/L-day and 2.8gDW/L-day) of biomass were produced by Aurantiochytrium and Thraustochytrium species, respectively. Thraustochytrids biomass contained up to 33% DW of lipids, rich in omega-3 polyunsaturated docosahexaenoic acid (C22:6, 124mg/g DW); up to 10.2mg/gDW of squalene and up to 61μg/gDW of total carotenoids, composed of astaxanthin, canthaxanthin, echinenone, and β-carotene. Along with the accumulation of these added-value chemicals in biomass, thraustochytrid representatives showed the ability to secrete extracellular polysaccharide matrixes containing lipids and proteins. Rhodotorula sp lipids (26% DW) were enriched in palmitic acid (C16:0, 18mg/gDW) and oleic acid (C18:1, 41mg/gDW). Carotenoids (87μg/gDW) were mainly represented by β-carotene (up to 54μg/gDW). Efficient growth on organic and inorganic sources of carbon and nitrogen from natural and anthropogenic wastewater pollutants along with intracellular and extracellular production of valuable nutrients makes the production of valuable chemicals from isolated species economical and sustainable.
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Affiliation(s)
- Ana F Miranda
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | | | - Tomer Abramov
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | - Faridah Jehalee
- School of Sciences, RMIT University, Melbourne, VIC, Australia; Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Thailand
| | - Mohini Miglani
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | - Zhiqian Liu
- AgriBio, Centre for AgriBioscience, La Trobe University, Bundoora, VIC 3083, Australia
| | - Simone Rochfort
- AgriBio, Centre for AgriBioscience, La Trobe University, Bundoora, VIC 3083, Australia
| | - Adarsha Gupta
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Benjamas Cheirsilp
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Thailand
| | - Benu Adhikari
- School of Sciences, RMIT University, Melbourne, VIC, Australia
| | - Munish Puri
- Centre for Marine Bioproducts Development, College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Aidyn Mouradov
- School of Sciences, RMIT University, Melbourne, VIC, Australia.
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10
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Shene C, Paredes P, Vergara D, Leyton A, Garcés M, Flores L, Rubilar M, Bustamante M, Armenta R. Antarctic thraustochytrids: Producers of long-chain omega-3 polyunsaturated fatty acids. Microbiologyopen 2019; 9:e00950. [PMID: 31637873 PMCID: PMC6957410 DOI: 10.1002/mbo3.950] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/17/2019] [Accepted: 09/24/2019] [Indexed: 01/14/2023] Open
Abstract
Thraustochytrids have been isolated from different aquatic systems; however, few studies have reported their occurrence in Antarctica. In this study, 13 strains close to strains belonging to the genera Oblongichytrium, Thraustochytrium, and Aurantiochytrium were isolated from seawater samples collected near the Antarctic Base Professor Julio Escudero (S 62°12'57' E 58°57'35″). Docosahexaenoic acid (DHA) was found in the total lipids of all the isolates; DHA content of the biomass (dry weight) varied between 3.3 and 33 mg/g under the growth conditions for isolation. Five of the Antarctic thraustochytrids were able to accumulate lipids at levels higher than 20% w/w. Two strains, RT2316-7 and RT2316-13, were selected to test the effect of the incubation temperature (at 5°C for 14 days and at 15°C for 5 days). Incubation temperature had little effect on the lipid content and biomass yield; however, its effect on the fatty acid composition was significant (p < .05). The low incubation temperature favored the accumulation of eicosapentaenoic acid (EPA), palmitic acid and stearic acid in the total lipids of RT2316-7. Percentage of EPA, DHA and the omega-6 fatty acid dihomo-γ-linolenic acid of total fatty acids of RT2316-13 was higher at the low incubation temperature. RT2316-13 accumulated the highest lipid content (30.0 ± 0.5%) with a carbon to nitrogen mass ratio equal to 16.9. On the contrary, lipid accumulation in RT2316-7 occurred at high concentration of the nitrogen sources (monosodium glutamate or yeast extract). The capability to accumulate lipids with a fatty acid profile that can be tuned through cultivation temperature make the Antarctic thraustochytrid RT2316-13 a candidate for the production of lipids with different uses.
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Affiliation(s)
- Carolina Shene
- Department of Chemical Engineering and Center of Food Biotechnology and BioseparationsBIORENUniversidad de La FronteraTemucoChile
- Centre of Biotechnology and Bioengineering (CeBiB)Universidad de La FronteraTemucoChile
| | - Paris Paredes
- Master Program in Engineering Sciences with specialization in BiotechnologyUniversidad de La FronteraTemucoChile
| | - Daniela Vergara
- Doctoral Program in Sciences of Natural ResourcesUniversidad de La FronteraTemucoChile
| | - Allison Leyton
- Department of Chemical Engineering and Center of Food Biotechnology and BioseparationsBIORENUniversidad de La FronteraTemucoChile
- Centre of Biotechnology and Bioengineering (CeBiB)Universidad de La FronteraTemucoChile
| | - Marcelo Garcés
- Department of Chemical Engineering and Center of Food Biotechnology and BioseparationsBIORENUniversidad de La FronteraTemucoChile
| | - Liset Flores
- Department of Chemical Engineering and Center of Food Biotechnology and BioseparationsBIORENUniversidad de La FronteraTemucoChile
- Centre of Biotechnology and Bioengineering (CeBiB)Universidad de La FronteraTemucoChile
| | - Mónica Rubilar
- Department of Chemical Engineering and Center of Food Biotechnology and BioseparationsBIORENUniversidad de La FronteraTemucoChile
| | - Mariela Bustamante
- Department of Chemical Engineering and Center of Food Biotechnology and BioseparationsBIORENUniversidad de La FronteraTemucoChile
- Centre of Biotechnology and Bioengineering (CeBiB)Universidad de La FronteraTemucoChile
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