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Growth and biochemical variability of the marine microalga Chlorella stigmatophora in batch cultures with different salinities and nutrient gradient concentration

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http://hdl.handle.net/2183/13841
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Title
Growth and biochemical variability of the marine microalga Chlorella stigmatophora in batch cultures with different salinities and nutrient gradient concentration
Author(s)
Fábregas, Jaime
Herrero, Concepción
Cabezas, Buenaventura
Abalde, Julio
Date
1987-03-30
Citation
Fabregas J, Herrero C, Cabezas B. Abalde J. Growth and biochemical variability of the marine microalga Chlorella stigmatophora in batch cultures with different salinities and nutrient gradient concentration. British Phycological Journal 1987, 22(3), 269-276.
Abstract
[Abstract] Chlorella stigmatophora was cultured under 56 different combinations of nutrient-salinity concentrations, ranging from 1 to 64 mM NaNO3 and from 0 to 35%. salinity. Optimal growth conditions for obtaining maximum cellular densities were between 1 and 8 mM NaNO3 for any salinity, with a maximum growth rate at the logarithmic phase of 0·51 doublings d-1. Production over the 15 days as measured by chlorophyll a estimation were maximal between 5 and 20%. and 8–32 mM NaNO3. Maximum protein per ml occurred at 8 and 16 mM NaNO3 for all the salinities, whereas maximum protein/cell contents were obtained at 16 and 32 mM NaNO3. Protein content per ml and per cell was not affected by salinity. The nitrate/protein transformation rate is related to nitrate concentration. Maximum rates were obtained at 1 mM NaNO3, with values between 92% and 100%. Nutrient concentration produced changes in the biomass production and biochemical composition of this marine microalga, with wide variations in the chlorophyll a and protein content per ml (up to 700% and 500%, respectively). This microalga shows an important capacity to adapt to changes in salinity, ranging from freshwater (0%.) to oceanic sea-water (35%.). The significance of these results for the possible utilization of Ch. stigmatophora as source of Single Cell Protein (SCP) is discussed.
Keywords
Chlorella stigmatophora
Salinity concentration
Growth conditions
NaNO3
Nutrient concentrations
Culture
Microalgae
Single Cell Protein (SCP)
 
Editor version
http://dx.doi.org/10.1080/00071618700650331
Rights
This is an Accepted Manuscript of an article published by Taylor & Francis in British Phycological Journal on 1987, available online: http://wwww.tandfonline.com/10.1080/00071618700650331

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