Some mixotrophic microalgae appear to exceed the sum of photoautotrophy and heterotrophy in terms of biomass production. This paper mainly reviews the carbon and energy metabolism of microalgae to reveal the synergistic mechanisms of the mixotrophic mode from multiple aspects. It explains the shortcomings of photoautotrophic and heterotrophic growth, highlighting that the mixotrophic mode is not simply the sum of photoautotrophy and heterotrophy. Specifically, microalgae in mixotrophic mode can be divided into separate parts of photoautotrophic and heterotrophic cultures, and the synergistic parts of photoautotrophic culture enhance aerobic respiration and heterotrophic culture enhance the Calvin cycle. Additionally, this review argues that current deficiencies in mixotrophic culture can be improved by uncovering the synergistic mechanism of the mixotrophic mode, aiming to increase biomass growth and improve quality. This approach will enable the full utilization of advantagesin various fields, and provide research directions for future microalgal culture.
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http://dx.doi.org/10.1016/j.biortech.2023.129512 | DOI Listing |
J Trace Elem Med Biol
December 2024
Department of Chemistry, University of Crete, Voutes Campus, Heraklion 70013, Greece; Environmental Chemical Processes Laboratory, University of Crete, Voutes Campus, Heraklion 70013, Greece. Electronic address:
As the concern for Ni contamination in the aquatic environment escalates, efforts for microalgal use in environmental monitoring and bioremediation are increasing. This study aims to evaluate the potential of Chlorella sorokiniana and Chlamydomonas reinhardtii for Ni bioremediation by investigating their physiological stress responses in Ni-contaminated environments. The analysis focuses on how Ni(II) uptake affects cell growth, nutrient metal homeostasis, and lipid unsaturation levels, as these parameters are critical indicators of metabolic stability and resilience essential for effective bioremediation.
View Article and Find Full Text PDFFront Microbiol
October 2024
College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China.
There has been an emergence of a diversity of microalgal mixotrophic synergistic mechanisms due to substrate differences. In this study, the effects of the mixotrophic culture of were examined. The maximum values of cell density, specific growth rate, and cell dry weight of were 3.
View Article and Find Full Text PDFWorld J Microbiol Biotechnol
September 2024
Tianjin Key Laboratory of Aqua-Ecology & Aquaculture, Fisheries College, Tianjin Agricultural University, Tianjin, 300384, China.
Euglena gracilis is a unique microalga that lacks a cell wall and is able to grow under different trophic culture conditions. In this study, cell growth, biomass production, and changes in the ultrastructure of E. gracilis cells cultivated photoautotrophically, mixotrophically, and under sequential-heterotrophy-photoinduction (SHP) were assessed.
View Article and Find Full Text PDFBioresour Technol
December 2024
Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China. Electronic address:
Dual carbon metabolisms and the synergism contribute to improving nutrient recovery under mixotrophy. However, how synergism influences nutrient recovery has yet to be understood, which is revealed in the current study. Due to dual carbon metabolisms and synergism,the PO-P recovery rate under mixotrophy reached 0.
View Article and Find Full Text PDFBioresour Technol
October 2024
Department of Biology and Environmental Science, Centre for Ecology and Evolution and Microbial Model Systems, Linnaeus University, 39231 Kalmar, Sweden. Electronic address:
Mixotrophic microalgal solutions are efficient nutrient recovery methods, with potential to prolong the cultivation seasons in temperate climates. To improve operation sustainability, the study used landfill leachate for nitrogen source and whey permeate for phosphorus and organic carbon. A non-axenic polyculture, dominated by green algae, was cultivated in mixotrophic mode on glucose or whey permeate compared to a photoautotrophic control in outdoor pilot-scaled raceway ponds during Nordic spring and autumn.
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