Data/hora: 06/06/2024 19:08:23

Provedor de dados: | 5
País: | France
Título: | Effects of blue light on the biochemical composition and photosynthetic activity of Isochrysis sp. (T-iso)
Autores: | Marchetti, Julie; Bougaran, Gael; Jauffrais, Thierry; Lefebvre, Sebastien; Rouxel, Catherine; Saint-jean, Bruno; Lukomska, Ewa; Robert, Rene; Cadoret, Jean-paul.
Data: | 2013-02
Ano: | 2013
Palavras-chave: | Isochrysis; Blue light; Photosynthesis; Proximate composition; Chemostat.
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.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00085/19599/17237.pdf

DOI:10.1007/s10811-012-9844-y

Editor: | Springer
Relação: | http://archimer.ifremer.fr/doc/00085/19599/
Formato: | application/pdf
Fonte: | Journal of Applied Phycology (0921-8971) (Springer), 2013-02 , Vol. 25 , P. 109-119
Fonte: | Springer Science+Business Media B.V. 2012