Journal article 79 views
Effects of temperature and nutrient regimes on biomass and lipid production by six oleaginous microalgae in batch culture employing a two-phase cultivation strategy
Michael Y. Roleda,
Steve Slocombe,
Raymond J.G. Leakey,
John G. Day,
Elanor M. Bell,
Michele S. Stanley
Bioresource Technology, Volume: 129, Pages: 439 - 449
Swansea University Author: Steve Slocombe
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DOI (Published version): 10.1016/j.biortech.2012.11.043
Abstract
Commercial success of algal-based biofuels depends on growth characteristics and lipid metabolism of the production species. The oleaginous microalgae, Thalassiosira pseudonana, Odontella aurita, Nannochloropsis oculata, Isochrysis galbana, Chromulina ochromonoides, and Dunaliella tertiolecta, were...
| Published in: | Bioresource Technology |
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| ISSN: | 0960-8524 |
| Published: |
Elsevier BV
2013
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa65475 |
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| Abstract: |
Commercial success of algal-based biofuels depends on growth characteristics and lipid metabolism of the production species. The oleaginous microalgae, Thalassiosira pseudonana, Odontella aurita, Nannochloropsis oculata, Isochrysis galbana, Chromulina ochromonoides, and Dunaliella tertiolecta, were cultivated under a matrix of two temperatures (10 and 20 °C) and two nutrient regimes (deplete and replete). For all species, a strong negative correlation between growth rate and lipid content was observed. Multiple stressors have no additive effect on lipid accumulation. Total oil content (fatty acid methyl esters, FAMEs, pg cell(-1)) was increased more by nutrient limitation than by temperature stress. In response to nutrient stress, N. oculata emerged as the most robust species with an increase in lipid accumulation of up to three to four-fold compared to the accumulation under nutrient sufficient conditions. Although stress conditions led to reduced fatty acid unsaturation in most taxa due to increased triacylglycerol (TAG) production, a high proportion of eicosapentaenoic acid (EPA) was maintained in O. aurita. |
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| Keywords: |
Biofuel; Fatty acid; Growth; Microalgae; Stress physiology |
| College: |
Faculty of Science and Engineering |
| Start Page: |
439 |
| End Page: |
449 |