Effect of light intensity on physiological changes, carbon allocation and neutral lipid accumulation in oleaginous microalgae
Abstract
Chlorella sp. and Monoraphidium sp. were the potential microalgal species for lipid production. This study aimed to investigate different light intensities (40, 200, 400 μmol photon m(-2) s(-1)) on physiological changes, photosynthetic carbon partitioning and neutral lipid accumulation in both microalgae. Results suggested that under high light (HL, 400 μmol photon m(-2) s(-1)), chlorophyll degraded, protein and carbohydrate content decreased; more carbon allocated into lipid as well as most of intracellular space was occupied by lipid bodies. Moreover, with the lipid accumulation, Fv/Fm decreased and ROS scavenging enzyme increased. Membrane lipid reduced dramatic (29.73-37.97%) to format NL (71.66% of total lipid in Chlorella sp. L1 and 60.65% in Monoraphidium dybowskii Y2). The NL productivity under HL (51.36 and 49.71 mg L(-1) d(-1)) were more than 3 times of those under LL. Additionally, FAME profiles proved that the useful fatty acid components for biodiesel production were enhanced under HL.
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References 36 · Cited by 367
- Authors
- He, Q., Yang, H., Wu, L., & Hu, C.
- Affiliations
- Chinese Academy of Sciences (CN)
- Corresponding author
- Hu, Chunxiang
- ORCID
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2015-09
- Volume
- 191
- Pages
- 219-228
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2194851919
- Cited by
- 367
- References
- 36
- Citations by year
- 2026: 19 · 2025: 47 · 2024: 45 · 2023: 30 · 2022: 42 · 2021: 43 · 2020: 43 · 2019: 38 · 2018: 25 · 2017: 16 · 2016: 13 · 2015: 5
- FWCI
- 5.81
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Institute of Hydrobiology, CAS Institutional Repository (submittedVersion)
- Funders
- National 863 program (2013AA065804)
- CAS
- 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
- light intensity, oleaginous microalgae, Chlorella, Monoraphidium, neutral lipid accumulation, carbon allocation, photosynthesis, reactive oxygen species scavenging, chlorophyll degradation, fatty acid composition, biodiesel feedstock, lipid productivity
- MeSH terms
- Carbon, Light, Photosynthesis, Pigments, Biological, Biomass, Lipid Metabolism, Microalgae
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