Cited by 38Algal biology and biofuel productionLipid metabolism and biosynthesisMicrobial Metabolic Engineering and Bioproduction

Effect of nitrogen limitation on cell growth, lipid accumulation and gene expression in Chlorella sorokiniana

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Li, Ying Xia, Zhao, Feng Juan, Yu, Dong Dong·2015·Brazilian Archives of Biology and Technology

Abstract

The influence of nitrogen (N) limitation on the cell growth, chlorophyll content, intracellular lipid production and expression levels of two pathway genes in Chlorella sorokiniana was investigated in mixotrophic culture in this study. The maximum biomass concentration of C. sorokinianacultured in modified BG11 medium containing 3, 6, 9, 12 and 15 mM N were 1.60, 2.21, 2.74, 3.18 and 3.21 g/L of dry cell weight, respectively with maximum specific growth rate of 0.180, 0.198, 0.201, 0.203, 0.206 day−1 during culture with an initial N feed of 3, 6, 9, 12 and 15 mM in the first eight days, respectively. The maximum lipid content was 51 % with 3 mM N. However, the maximum lipid productivity of 0.00884 g L−1 day−1 was achieved with 6 mM N. Expression levels of accD (heteromeric acetyl-CoA carboxylase beta subunit) and accI (homomeric acetyl-CoA carboxylase) genes in C. sorokiniana were studied by real-time PCR. Increased expression levels of accD reflected the increased lipid content in stationary phase. In contrast, expression of the acc1 gene always remained low, showing that the gene might not be critical for lipid accumulation.

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Authors
Li, Y. X., Zhao, F. J., & Yu, D. D.
Affiliations
  • Qingdao Agricultural University (CN)
  • Shandong University of Aeronautics (CN)
  • Huangdao Entry-Exit Inspection and Quarantian Bureau, China
Corresponding author
Yu, Dong Dong
Venue
Brazilian Archives of Biology and Technology
Published
2015-06
Volume
58
Issue
3
Pages
462-467
ISSN
1516-8913 (ISSN-L)
OpenAlex
W1540784925
Cited by
38
References
14
Citations by year
2026: 1 · 2025: 4 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 4 · 2019: 5 · 2018: 3 · 2017: 7 · 2016: 1
FWCI
1.09
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Brazilian Archives of Biology and Technology (publishedVersion, cc-by-nc)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
  • Americanae (AECID Library) (submittedVersion, cc-by-nc)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Qingdao Agricultural University
  • Natural Science Foundation of Shandong Province (ZR2011DL012)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
Keywords
Chlorella sorokiniana, nitrogen limitation, lipid accumulation, microalgae, mixotrophic cultivation, cell growth, chlorophyll content, acetyl-CoA carboxylase, gene expression, lipid productivity, stationary phase

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