Effects of blue light on the biochemical composition and photosynthetic activity of Isochrysis sp. (T-iso)
| Type | Article | ||||||||||||
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| Date | 2013-02 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Marchetti Julie1, Bougaran Gael 1, Jauffrais Thierry1, Lefebvre Sebastien2, Rouxel Catherine1, Saint-Jean Bruno1, Lukomska Ewa1, Robert Rene3, Cadoret Jean-Paul1 |
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| Affiliation(s) | 1 : IFREMER, Lab Physiol & Biotechnol Algues, F-44311 Nantes 3, France. 2 : Univ Lille 1, LOG, CNRS, Stn Marine Wimereux,UMR 8187, F-62930 Wimereux, France. 3 : IFREMER, Lab Physiol & Ecophysiol Mollusques Marins, Stn Expt Argenton, F-29840 Argenton En Landunvez, France. |
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| Source | Journal Of Applied Phycology (0921-8971) (Springer), 2013-02 , Vol. 25 , N. 1 , P. 109-119 | ||||||||||||
| DOI | 10.1007/s10811-012-9844-y | ||||||||||||
| WOS© Times Cited | 53 | ||||||||||||
| Keyword(s) | Isochrysis, Blue light, Photosynthesis, Proximate composition, Chemostat | ||||||||||||
| Abstract | In aquaculture, particularly in bivalve hatcheries, the biochemical composition of algal diets has a strong influence on larval and post-larval development. Biochemical composition is known to be related to culture conditions, among which light represents a major source of variation. The effects of blue light on biochemical composition and photosynthetic rate of Isochrysis sp. (T-iso) CCAP 927/14 were assessed in chemostat at a single irradiance (300 μmol photons m−2 s−1) and compared with white light. Two different dilution (renewal) rates were also tested: 0.7 and 0.2 d−1. Relative carbohydrate content was lower under blue light than under white light at both dilution rates, whereas chlorophyll a and photosynthesis activity were higher. In contrast, carbon quota was lower and protein content higher under blue light than under white light, but only at 0.7 d−1. Despite these metabolic differences, cell productivity was not significantly affected by the spectrum. However, the nitrogen to carbon ratio and photosynthetic activity were higher at 0.7 d−1 than at 0.2 d−1, while carbon quota and carbohydrate content were lower. Our results show that blue light may influence microalgal metabolism without reducing productivity for a given growth rate, a result that should be of great interest for microalgal production in aquaculture. | ||||||||||||
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