Effect of temperature and nitrogen concentration on biomass composition of Heterochlorella luteoviridis
Food Sci. Technol (SBCTA, Impr.)
; Food Sci. Technol (SBCTA, Impr.);37(spe): 28-37, Dec. 2017. tab, graf
Article
en En
| LILACS
| ID: biblio-892227
Biblioteca responsable:
BR25.1
ABSTRACT
Abstract The interest in microalga as a food supplement has grown due their high contents of carotenoids, polyunsaturated fatty acids and proteins. This study evaluated the effect of different temperatures (22, 27 or 32 °C) and sodium nitrate concentrations (12, 24, 36, 48 or 60 mg L-1 of N-NO3) in culture medium on Heterochlorella luteoviridis biomass production and composition. The highest biomass concentration (3.35 g L-1) was observed at the highest N-NO3 concentration. The N-NO3 concentration positively affected protein, carbohydrate and carotenoids contents of biomass. On the other hand, cells cultured at the lowest N-NO3 concentration showed a slight increment in lipid content. The major carotenoid was lutein (30.7 ± 1.4% of total carotenoids), and the polyunsaturated fatty acids were 37 ± 2% of total fatty acids. Low temperature improved the biosynthesis of ω3 type fatty acids by lowering the ω6ω3 ratio. Overall, our results indicate H. luteoviridis can yield high biomass concentration under autotrophic growth, resulting in a biomass rich in carotenoids, mainly lutein, and ω3 polyunsaturated fatty acids.
Texto completo:
1
Colección:
01-internacional
Base de datos:
LILACS
Idioma:
En
Revista:
Food Sci. Technol (SBCTA, Impr.)
Asunto de la revista:
ALIMENTOS
/
CIENCIAS DA NUTRICAO
Año:
2017
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Brasil