Effect of Salt and Potassium Limitation on Biomass and Lipid Production of Arthrospira platensis

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Gürkaya Kutluk B., Kutluk T.

6th International Symposium of Scientific Research and Innovative Studies, Balıkesir, Türkiye, 11 - 14 Mart 2026, ss.526-531, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Balıkesir
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.526-531
  • Kocaeli Üniversitesi Adresli: Evet

Özet

This study investigated the combined effects of salt (NaHCO₃) and potassium

(K₂HPO₄) limitation on biomass production and lipid accumulation of Arthrospira platensis

cultivated in modified Zarrouk medium. A Central Composite Design (CCD) within Response

Surface Methodology (RSM) was applied to evaluate individual and interactive effects of

nutrient restriction. Biomass concentration ranged from 0.47 to 1.34 g/L, while lipid content

varied between 13.6% and 17.4%. ANOVA results indicated that salt and potassium levels

significantly affected biomass production (p < 0.001), whereas lipid content was not statistically

influenced within the tested range (p > 0.05). The regression model showed excellent predictive

capability for biomass (R² = 0.99), while lipid prediction was statistically weak (R² = 0.52).

Three-dimensional response surface analysis revealed a strong interaction between salt and

potassium concentrations for biomass formation, with maximum growth observed at high salt

and moderate potassium levels. These findings suggest that nutrient limitation primarily alters

growth kinetics rather than substantially enhancing lipid accumulation.