Mixotrophy, a more promising culture mode: Multi-faceted elaboration of carbon and energy metabolism mechanisms to optimize microalgae culture.

Bioresour Technol

College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang 315211, China; Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota-Twin Cities, Saint Paul, MN 55108, USA. Electronic address:

Published: October 2023

AI Article Synopsis

  • Some mixotrophic microalgae can produce more biomass than what is achievable through just photoautotrophy (using light) or heterotrophy (using organic carbon) alone.
  • * The review discusses how these microalgae benefit from both growth modes, detailing how their unique metabolism enhances respiration and the Calvin cycle simultaneously.
  • * The paper suggests that understanding the synergistic mechanisms of mixotrophic growth can address current limitations and improve biomass production and quality in future research.*

Article Abstract

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.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.biortech.2023.129512DOI Listing

Publication Analysis

Top Keywords

mixotrophic mode
16
carbon energy
8
energy metabolism
8
sum photoautotrophy
8
photoautotrophy heterotrophy
8
photoautotrophic heterotrophic
8
parts photoautotrophic
8
culture enhance
8
culture
6
mixotrophic
6

Similar Publications

Nickel-induced multimetal uptake in two microalgal species (Chlorella sorokiniana and Chlamydomonas reinhardtii) and its effect on growth and lipid unsaturation.

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 PDF

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 PDF

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 PDF

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 PDF

Microalgal production and nutrient recovery under mixotrophic mode using cheese whey permeate.

Bioresour 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.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!