masoumeh Helmi-Seresht; sara Saadatmand; ramezanali Khavari-Nejad
Abstract
Cyanobacterium Arthrospira (Spirulina) platensis is a filamentous blue-green algae which has many nutritional and medicinal values for humans and animals. The present study investigated the effect of light intensity and pH on the productions of protein, fat, chlorophyll a and carotenoids in Spirulina ...
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Cyanobacterium Arthrospira (Spirulina) platensis is a filamentous blue-green algae which has many nutritional and medicinal values for humans and animals. The present study investigated the effect of light intensity and pH on the productions of protein, fat, chlorophyll a and carotenoids in Spirulina platensis. Pure sample of Spirulina was grown in BG-11 liquid culture medium under the influence of three optical intensities including 1500, 1000 (control), and 500 Lux and five pH treatments including 5.1, 6.1, 7.1 (control), 8.1, 9.1 and fintensity had a statistically significant impact on the amount of fat production in the cyanobacterium. However, no significant difference was observed in the amounts of the protein and photosynthetic pigments productions. The results of investigating the influence of pH changes in Spirulina platensis indicated that alkaline pH was more suitable in the productions of fat and protein than neutral pH and resulted in a significant increase in the amount of these compounds in cyanobacterium Spirulina.
