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| Título: | Synergistic effect of UV radiation and nutrient limitation on Chlorella fusca (Chlorophyta) cultures grown in outdoor cylindrical photobioreactors |
Autor: | Malpartida, Irene; Navarro, Enrique CSIC ORCID | Palabras clave: | Bio-optics Chlorella fusca In vivo chlorophyll fluorescence Photosynthetic pigments UV radiation Lipids Lipid peroxidation Proteins Biochemical composition |
Fecha de publicación: | 20-nov-2014 | Editor: | Inter Research | Citación: | Aquatic Biology 22: 141-158 (2014) | Resumen: | This study assessed the interactive effects of UVR and nutrient depletion on Chlorella fusca cultures on the production and accumulation of particular biomolecules. To accomplish this, algae were grown for 5 d in outdoor thin-layer cascade cultivators under 3 nutrient treatments (full nutrients, -N and -S) and then transferred to outdoor cylindrical photobioreactors for another 5 d. Cultures were then exposed to full solar radiation (PAB) and decreased UVR. During the last 5 d, bio-optical properties, photosynthetic activity, pigments, biochemical composition and oxidative stress were assessed. Initially, nutrient depletion caused changes in productivity and cell number in a manner that affected biochemical composition. After 3 d, the percentage of lipids in the cultures under N deprivation reached values appropriate for being used as feed or food additives or for energy applications (35% of lipid content), regardless of the light conditions. A longer exposure (5 d) resulted in interactive effects of light and nutrient conditions. Specifically, PAB increased lipid content in all cases (1.3- to 2.3-fold), but particularly under S deprivation. Longer exposure to PAB also increased oxidative stress in UVR and nutrient-limited treatments (-N and -S). These results showed that the benefits expected from nutrient depletion (increase in biomolecule content e.g. lipids, carbohydrates and pigments) were modulated by the negative effects of algal UVR acclimation costs. | Descripción: | 18 páginas.- Irene Malpartida... et al. | Versión del editor: | http://dx.doi.org/10.3354/ab00595 | URI: | http://hdl.handle.net/10261/128769 | DOI: | 10.3354/ab00595 | ISSN: | 1864-7782 | E-ISSN: | 1864-7790 |
| Aparece en las colecciones: | (IPE) Artículos |
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| Malpartida_etal_UV_Chlorella2016.pdf | 512,74 kB | Adobe PDF |  Visualizar/Abrir |
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