Cited by 1,116Algal biology and biofuel productionMicrobial Metabolic Engineering and BioproductionLipid metabolism and biosynthesis

Effects of nitrogen sources on cell growth and lipid accumulation of green alga Neochloris oleoabundans

Li, Yanqun, Horsman, Mark, Wang, Bei, Wu, Nan, Lan, Christopher Q.·2008·Applied Microbiology and Biotechnology

Abstract

Microalgal lipids are the oils of future for sustainable biodiesel production. However, relatively high production costs due to low lipid productivity have been one of the major obstacles impeding their commercial production. We studied the effects of nitrogen sources and their concentrations on cell growth and lipid accumulation of Neochloris oleoabundans, one of the most promising oil-rich microalgal species. While the highest lipid cell content of 0.40 g/g was obtained at the lowest sodium nitrate concentration (3 mM), a remarkable lipid productivity of 0.133 g l(-1) day(-1) was achieved at 5 mM with a lipid cell content of 0.34 g/g and a biomass productivity of 0.40 g l(-1) day(-1). The highest biomass productivity was obtained at 10 mM sodium nitrate, with a biomass concentration of 3.2 g/l and a biomass productivity of 0.63 g l(-1) day(-1). It was observed that cell growth continued after the exhaustion of external nitrogen pool, hypothetically supported by the consumption of intracellular nitrogen pools such as chlorophyll molecules. The relationship among nitrate depletion, cell growth, lipid cell content, and cell chlorophyll content are discussed.

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Crossref · 10.1007/s00253-008-1681-1

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  • Klanchui et al. analyzed depletion of NO3−, PO4−, and SO4− to obtain glycogen-enriched biomass of A. platensis; reduction in SO4− increased yield of glycogen production 300% compared to control after 24 h, but after 96 h amounts of glycogen were similar to NO3− depletion (60% DW).

    “Klanchui et al. [60] analyzed the effect of depletion of NO 3-, PO4 3-, and SO4 2-to obtain a glycogen-enriched biomass of Arthrospira platensis, where it seems that the reduction in SO4 2-increased the yield of glycogen production 300% compared to the control after just 24 h of incubation, nevertheless, after 96 h of incubation, the amounts of glycogen obtained were similar to NO 3-depletion (60%”

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Authors
Li, Y., Horsman, M., Wang, B., Wu, N., & Lan, C. Q.
Affiliations
University of Ottawa (CA)
Corresponding author
Lan, Christopher Q.
Venue
Applied Microbiology and Biotechnology
Published
2008-12
Volume
81
Issue
4
Pages
629-636
ISSN
  • 0175-7598 (ISSN-L)
  • 1432-0614
OpenAlex
W2047281856
Cited by
1,116
References
31
Citations by year
2026: 18 · 2025: 24 · 2024: 30 · 2023: 47 · 2022: 52 · 2021: 61 · 2020: 78 · 2019: 76 · 2018: 81 · 2017: 91 · 2016: 98 · 2015: 86 · 2014: 103 · 2013: 94 · 2012: 74
FWCI
19.52
Type
journal article
Language
en
Open access
closed
Locations
  • Applied Microbiology and Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Natural Sciences and Engineering Research Council of Canada
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
Neochloris oleoabundans, nitrogen source, sodium nitrate, lipid accumulation, biomass productivity, cell growth, microalgae oil, biodiesel feedstock
MeSH terms
Chlorophyta, Chlorophyll, Nitrogen, Biomass, Lipid Metabolism

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