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<p>The objective was to evaluate the effect of supplementation, limitation, and reduction of NO<sub>3</sub> (nitrate) concentrations on the joint production and composition of biomass, lipids, and exopolysaccharides (EPS) of the green alga,&#xa0;<i>Monoraphidium griffithii</i>. The BG-11 culture medium was supplemented with different concentrations of NO<sub>3</sub> (0.5, 1.0, and 1.5 g L<sup>-1</sup>) and NO<sub>3</sub> limitation (TN). NO<sub>3</sub> limitation (TN) was the best treatment because it produced the highest biomass of <i>M. griffithii</i> (0.70 g L<sup>-1</sup>) with the highest lipid content (33.5%) and protein (24.50%) compared to the treatments with NO<sub>3</sub> supplementation. TN stimulated the total production of EPS (up to 40%) rich in glucose (26%), rhamnose (19%), and galactose (16%). This study provided a strategy to increase the simultaneous production of biomass, lipids, and EPS with reduced nitrate use. Thus, combining the reduction in a culture medium nutrient favors the production of biomass, EPS, and lipids.</p>

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Nitrate (NO₃) limitation in cultivating Monoraphidium griffithii: a strategy for simultaneous production of biomass, lipids, and exopolysaccharides

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Lucas Guimarães Cardoso,
  • Jadson dos Santos França,
  • Jamila Sueira de Jesus Silva,
  • Gabriele Marques dos Santos,
  • Priscilla Quenia Muniz Bezerra,
  • Bianca Bomfim Andrade,
  • Jaqueline Carmo da Silva,
  • Carolina Oliveira de Souza,
  • Céline Laroche,
  • Denilson de Jesus Assis,
  • Jania Betania Alves da Silva,
  • Ana Teresa Lombardi

摘要

The objective was to evaluate the effect of supplementation, limitation, and reduction of NO3 (nitrate) concentrations on the joint production and composition of biomass, lipids, and exopolysaccharides (EPS) of the green alga, Monoraphidium griffithii. The BG-11 culture medium was supplemented with different concentrations of NO3 (0.5, 1.0, and 1.5 g L-1) and NO3 limitation (TN). NO3 limitation (TN) was the best treatment because it produced the highest biomass of M. griffithii (0.70 g L-1) with the highest lipid content (33.5%) and protein (24.50%) compared to the treatments with NO3 supplementation. TN stimulated the total production of EPS (up to 40%) rich in glucose (26%), rhamnose (19%), and galactose (16%). This study provided a strategy to increase the simultaneous production of biomass, lipids, and EPS with reduced nitrate use. Thus, combining the reduction in a culture medium nutrient favors the production of biomass, EPS, and lipids.