Paper Information

Journal:   IRANIAN INTERNATIONAL JOURNAL OF SCIENCE   Fall 2003 , Volume 4 , Number 2; Page(s) 97 To 106.
 
Paper: 

INFLUENCE OF TEMPERATURE ON GROWTH AND BIOCHEMICAL COMPOSITION OF SPIRULINA PLATENSIS AND S. FUSIFORMIS

 
 
Author(s):  RAFIQUL ISLAM MD., HASSAN A., SULEBELE G., OROSCO C., ROUSTAIAN P.
 
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Abstract: 
The influence of temperature on growth and biochemical constituents of two species of Spirulina; Spirulina platensis and Spirulina fusiformis was studied. Various temperatures as 20, 25, 30, 32, 35, 37 and 40°C were investigated. Maximum specific growth rate of 0.141 was found at 32°C for S. platensis and that of 0.144 was found at 37°C for S. fusiformis. Both species showed negligible growth at 20°C and 40°C and after 6-8 days culture collapsed. Maximum protein content was found at 32°C for S. platensis and at 30°C for S. fusiformis and was 59.0 and 62.3 %, respectively. At 37°C a significant increase in carbohydrates and in lipids were observed for both species; S. platensis (29.3 and 10.5%) and S. fusiformis (24.3 and 11.0%). Maximum biomass production of 2.4 g 1^-1 and chlorophyll a production of 16.6 mg 1^-1 were observed at 32°C for S. platensis. Maximum biomass production of 2.3 g 1^-1 and chlorophyll a production of 14.2 mg 1^-1 were observed at 37°C for S. fusiformis. A net increase in phycocyanin occurred in both species when cultures were grown at the suboptimal temperature of 25°C. From the results the optimal growth temperature for S. platensis found at 32°C and that for S. fusiformis found at 37°C. It can be concluded from the findings that both species are suitable for culture in the tropics.
 
Keyword(s): SPIRULINA, OPTIMAL GROWTH TEMPERATURE, PIGMENT, BIOCHEMICAL COMPOSITION.
 
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