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Enhancing growth rate and lipid yield of Chlorella with nuclear irradiation under high salt and CO2 stress.
- Source :
-
Bioresource technology [Bioresour Technol] 2016 Mar; Vol. 203, pp. 220-7. Date of Electronic Publication: 2015 Dec 18. - Publication Year :
- 2016
-
Abstract
- In order to produce biodiesel from microalgae cultured with abundant seawater, Chlorella sp. was mutated with (137)Se-γ ray irradiation and domesticated with f/2 seawater culture medium (salinity=3 wt.%) under 15 vol.% CO2 stress. Biomass yield of the mutant increased by 25% compared with wild species and lipid content increased to 54.9%. When nitrogen and phosphorus concentrations in the initial substrate increased, the increased propagation speed of the mutant resulted in decreased cell diameter by 26.6% and decreased cell wall thickness by 69.7%. The dramatically increased biomass yield of the mutant with sufficient initial substrate and relative nitrogen starvation in the later growth period with continuous 15 vol.% CO2 led to an increased lipid yield of 1.0 g/L. The long-chain unsaturated fatty acids increased, whereas short-chain saturated fatty acids decreased.<br /> (Copyright © 2015 Elsevier Ltd. All rights reserved.)
- Subjects :
- Cesium Radioisotopes
Chlorella drug effects
Chlorella radiation effects
Fatty Acids metabolism
Gamma Rays
Gene Expression Regulation, Plant drug effects
Gene Expression Regulation, Plant radiation effects
Lipid Metabolism drug effects
Lipid Metabolism genetics
Lipid Metabolism radiation effects
Microalgae drug effects
Microalgae radiation effects
Mutagenesis
Nitrogen metabolism
Phosphorus metabolism
Biofuels
Carbon Dioxide pharmacology
Chlorella growth & development
Lipids isolation & purification
Microalgae growth & development
Sodium Chloride pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 203
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 26724554
- Full Text :
- https://doi.org/10.1016/j.biortech.2015.12.032