Photosynthetic acclimation of Nannochloropsis oculata investigated by multi-wavelength chlorophyll fluorescence analysis
| Autor: | Ross McC. Lilley, Anthony W. D. Larkum, John A. Raven, Kieran Parker, Ulrich Schreiber, Martin Schliep, Supriya Guruprasad, Peter J. Ralph, Unnikrishnan Kuzhiumparambil, Milán Szabó, Bojan Tamburic |
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| Rok vydání: | 2014 |
| Předmět: |
Chlorophyll
Environmental Engineering Photosystem II Acclimatization Bioengineering Photosynthetic efficiency Photochemistry Photosynthesis Fluorescence Electron Transport chemistry.chemical_compound Microalgae Waste Management and Disposal Chlorophyll fluorescence biology Renewable Energy Sustainability and the Environment Non-photochemical quenching Fatty Acids Photosystem II Protein Complex Esters General Medicine biology.organism_classification chemistry Absorption Physicochemical Photosynthetic acclimation Quantum Theory Nannochloropsis Biotechnology |
| Zdroj: | Bioresource technology. 167 |
| ISSN: | 1873-2976 |
| Popis: | Multi-wavelength chlorophyll fluorescence analysis was utilised to examine the photosynthetic efficiency of the biofuel-producing alga Nannochloropsis oculata, grown under two light regimes; low (LL) and high (HL) irradiance levels. Wavelength dependency was evident in the functional absorption cross-section of Photosystem II (σII(λ)), absolute electron transfer rates (ETR(II)), and non-photochemical quenching (NPQ) of chlorophyll fluorescence in both HL and LL cells. While σII(λ) was not significantly different between the two growth conditions, HL cells upregulated ETR(II) 1.6-1.8-fold compared to LL cells, most significantly in the wavelength range of 440-540nm. This indicates preferential utilisation of blue-green light, a highly relevant spectral region for visible light in algal pond conditions. Under these conditions, the HL cells accumulated saturated fatty acids, whereas polyunsaturated fatty acids were more abundant in LL cells. This knowledge is of importance for the use of N. oculata for fatty acid production in the biofuel industry. © 2014 Elsevier Ltd. |
| Databáze: | OpenAIRE |
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