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Enhancing the growth rate and astaxanthin yield of Haematococcus pluvialis by nuclear irradiation and high concentration of carbon dioxide stress.
- Source :
-
Bioresource technology [Bioresour Technol] 2016 Mar; Vol. 204, pp. 49-54. Date of Electronic Publication: 2016 Jan 02. - Publication Year :
- 2016
-
Abstract
- Unicellular green microalgae Haematococcus pluvialis was mutated with (60)Co-γ irradiation to promote growth rate and increase astaxanthin yield under high concentration of CO2 stress. The average specific growth rate of H. pluvialis mutated with 4000 Gy γ-ray irradiation was increased by 15% compared with the original strain with air aeration. The mutant grew best with 6% CO2 (the maximum specific growth rate was 0.60/d) when it was cultured with high concentrations of CO2 (2-10%). The peak biomass productivity (0.16 g/L/d) of the mutant cultured with 6% CO2 was 82% higher than that of the mutant with air. The astaxanthin yield and lipid content of the mutant induced with 6% CO2 and high light (108 μmol photons m(-2) s(-1)) increased to 46.0mg/L and 45.9%, which were 2.4 and 1.3 times higher than those of the wild-type strain, respectively.<br /> (Copyright © 2016 Elsevier Ltd. All rights reserved.)
- Subjects :
- Biomass
Cell Culture Techniques
Chlorophyta drug effects
Chlorophyta radiation effects
Industrial Microbiology methods
Microalgae drug effects
Microalgae radiation effects
Xanthophylls metabolism
Carbon Dioxide pharmacology
Chlorophyta growth & development
Chlorophyta metabolism
Gamma Rays
Microalgae growth & development
Microalgae metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 204
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 26773378
- Full Text :
- https://doi.org/10.1016/j.biortech.2015.12.076