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Effects of Nitrogen and Micronutrients on Spirulina platensis Physiology

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  • Nishant

    (PDM University, Haryana)

  • Shweta

    (Starex University, Gurugram)

  • Sheeba

    (Manav Rachna International Institute of Research and Studies, Faridabad)

  • Purushothaman R

    (Annamalai University, Tamil Nadu)

Abstract

Spirulina platensis, a filamentous cyanobacterium, is extensively cultivated for its nutritional value and bioactive compounds. Environmental stressors significantly affect its growth and biochemical composition. This study examines the impact of nitrogen (NaNO₃) and micronutrient (MgSO₄, CaCl₂) stress on biomass production, specific growth rate, and chlorophyll a content in S. platensis. Cultures were grown in modified Zarrouk’s medium with fivefold increased nutrient concentrations. Growth was monitored spectrophotometrically at 565 nm (biomass), 680 nm (chlorophyll-a), and 750 nm (growth rate). Results revealed that NaNO₃ stress reduced growth and pigment accumulation, while MgSO₄ and CaCl₂ stress enhanced both. The highest biomass (0.8851 g/L) was recorded under CaCl₂ stress, and the lowest (0.2754 g/L) under NaNO₃ stress. These findings highlight the potential of micronutrient enrichment in optimizing Spirulina cultivation.

Suggested Citation

  • Nishant & Shweta & Sheeba & Purushothaman R, 2025. "Effects of Nitrogen and Micronutrients on Spirulina platensis Physiology," International Journal of Research and Scientific Innovation, International Journal of Research and Scientific Innovation (IJRSI), vol. 12(7), pages 866-876, July.
    • Handle: RePEc:bjc:journl:v:12:y:2025:i:67:p:866-876
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