scholarly journals Biomass production and biochemical composition in mass cultures of the marine microalga Isochrysis galbana Parke at varying nutrient concentrations

Aquaculture ◽  
1986 ◽  
Vol 53 (2) ◽  
pp. 101-113 ◽  
Author(s):  
Jaime Fabregas ◽  
Concepcion Herrero ◽  
Buenaventura Cabezas ◽  
Julio Abalde
Keyword(s):  
Biomass Production ◽  
Biochemical Composition ◽  
Isochrysis Galbana ◽  
Nutrient Concentrations ◽  
Marine Microalga ◽  
Mass Cultures

Distinctive control of metabolic pathways byChlorella autotrophicain semicontinuous culture

1996 ◽  
Vol 42 (11) ◽  
pp. 1087-1090 ◽  
Author(s):  
Jaime Fábregas ◽  
Manuel Patiño ◽  
Ever D. Morales ◽  
Adolfo Dominguez ◽  
Ana Otero
Keyword(s):  
Growth Rate ◽  
Metabolic Pathways ◽  
Biochemical Composition ◽  
Nutrient Concentration ◽  
Nutrient Concentrations ◽  
Organic Fraction ◽  
Culture Volume ◽  
Semicontinuous Culture ◽  
Marine Microalga ◽  
Strong Control

The marine microalga Chlorella autotrophica was cultured semicontinuously under light–dark synchronizing conditions at two nutrient concentrations (2 and 4 mmol N∙L−1) and five rates of daily renewal (from 10 to 50% of culture volume). Under such conditions, the biochemical composition of C. autotrophica was strongly influenced by the renewal rate, but unlike other marine microalgae, the nutrient concentration had no effect on the biochemical composition of the organic fraction of the microalga at a given growth rate. Results suggest that this species exerts a strong control over metabolic pathways, independent of the nutrient concentration in the medium.Key words: Chlorella autotrophica, semicontinuous culture, biochemical composition.

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