Journal article
Temperature and salinity effects on growth and fatty acid composition of a halophilic diatom, Amphora sp. MUR258 (Bacillariophyceae)
Journal of Applied Phycology, Vol.32, pp.977-987
2020
Abstract
Diatoms are of great interest for large-scale cultivation due to their high lipid content. The ability to grow over a wide range of salinities is also of great advantage. We studied the effect of temperature and salinity on the growth, lipids and fatty acid profiles of a newly isolated halophilic diatom Amphora sp. MUR 258. Amphora sp. MUR 258 is unusual in that it grows over a wide range of temperatures (24–35 °C) and salinities (7–12% (w/v) NaCl). The highest specific growth rate (SGR; 0.607 ± 0.017 day−1) was achieved at 7% NaCl at 35 °C, and the lowest SGR (0.433 ± 0.087 day−1) was obtained at 9% NaCl at 25 °C. The cells contained more lipids in the exponential phase, except when grown at 12% NaCl where the lipid content was higher in the stationary phase. The alga achieved its highest lipid content (57.69 ± 2.039% ash-free dry weight (AFDW) when grown at 7% NaCl at 25 °C and the lowest (34.43 ± 3.955% AFDW) obtained at 12% NaCl at 35 °C. The highest biomass productivity (0.171 ± 0.017 gAFDW L−1 day−1) and the lipid productivity (0.062 ± 0.017 gAFDW L−1 day−1) were achieved when the Amphora were grown at 9% NaCl at 35 °C and 7% at 25 °C, respectively. Irrespective of the growth conditions, the predominant fatty acids of Amphora sp. MUR 258 were palmitic acid (C16:0), stearic acid (C18:0), palmitoleic acid (C16:1) and oleic acid (C18:1), as well as low quantities of eicosapentaenoic acid (C20:5).
Details
- Title
- Temperature and salinity effects on growth and fatty acid composition of a halophilic diatom, Amphora sp. MUR258 (Bacillariophyceae)
- Authors/Creators
- I. Indrayani (Author/Creator)N.R. Moheimani (Author/Creator)K. de Boer (Author/Creator)P.A. Bahri (Author/Creator)M.A. Borowitzka (Author/Creator)
- Publication Details
- Journal of Applied Phycology, Vol.32, pp.977-987
- Publisher
- Springer
- Identifiers
- 991005541707007891
- Copyright
- © 2020 Springer Nature B.V.
- Murdoch Affiliation
- Algae R&D Centre; Centre for Sustainable Aquatic Ecosystems; Harry Butler Institute; School of Engineering and Information Technology; School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.171 Photoproductivity
- 3.171.477 Microalgae Biotechnology
- Web Of Science research areas
- Biotechnology & Applied Microbiology
- Marine & Freshwater Biology
- ESI research areas
- Plant & Animal Science