| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Effects of blue light on the biochemical composition and photosynthetic activity of Isochrysis sp. (T-iso)
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| Autores: |
Marchetti, Julie
Bougaran, Gael
Jauffrais, Thierry
Lefebvre, Sebastien
Rouxel, Catherine
Saint-jean, Bruno
Lukomska, Ewa
Robert, Rene
Cadoret, Jean-paul
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| Data: |
2013-02
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| Ano: |
2013
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| Palavras-chave: |
Isochrysis
Blue light
Photosynthesis
Proximate composition
Chemostat
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| Resumo: |
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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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00085/19599/17237.pdf
DOI:10.1007/s10811-012-9844-y
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| Editor: |
Springer
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| Relação: |
http://archimer.ifremer.fr/doc/00085/19599/
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| Formato: |
application/pdf
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| Fonte: |
Journal of Applied Phycology (0921-8971) (Springer), 2013-02 , Vol. 25 , P. 109-119
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| Direitos: |
Springer Science+Business Media B.V. 2012
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