<div><strong>Background:</strong> <em>Spirulina</em> is a multicellular, filamentous cyanobacterium, belonging to the Phormidiaceae family which appears as blue-green filaments composed of cylindrical cells arranged in unbranched helicoidal trichomes. It contains a wide spectrum of nutrients that include proteins with all essential amino acids, carbohydrates, vitamins, minerals, pigments, carotenoids and super antioxidants apart from trace elements.&nbsp;<br />
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<strong>Methods:</strong> The aim of the present study is to optimize the growth of cyanobacterium i.e., <em>Spirulina platensis</em> in selected media such as Zarrouk&rsquo;s modified medium, Zarrouk&rsquo;s medium, BG11 medium and F-2 medium. The growth analyses were recognized after 30 days. The temperature was maintained at 30&plusmn;2&deg;C under 12:12 hour light-dark cycles, light illuminated (4500 lux).&nbsp;<br />
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<div><strong>Result:</strong> The maximum biomass of 0.641 gm/ml was achieved in Zarrouk&rsquo;s modified medium. The inoculation of S. platensis in the F-2 medium showed the least growth of alga. The maximum concentration of phycocyanin content (0.19 mg/ml) and total carotenoid contents (5.99 &micro;g/ml) were observed in Zarrouk&rsquo;s modified medium followed by Zarrouk&rsquo;s medium (0.12 mg/ml and 5.51 &micro;g/ml) and minimum amounts were observed in F-2 medium (0.08 mg/ml and 3.08 &micro;g/ml). According to the results, this study concluded that the growth and biomass of <em>Spirulina</em> with significant cell count and higher pigment proteins can be enhanced by using the naturally modified medium.</div>


Evaluation of Nutrient Dependent Growth of Spirulina platensis for Pigment-proteins Production