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<p>In order to optimize the culture conditions of the diatom <i>Chaetoceros lorenzianus</i>, effects of phosphorus sources (K<sub>2</sub>HPO<sub>4</sub>, KH<sub>2</sub>PO<sub>4</sub>, CaP<sub>2</sub>H<sub>4</sub>O<sub>8</sub>) and phosphorus concentrations (0.50, 1.00, 1.50, 2.00, 2.50, 3.00&#xa0;mg L<sup>−1</sup>) on <i>C. lorenzianus</i> were studied. The results showed that phosphorus sources and phosphorus concentrations had significant effects on the growth, chlorophyll <i>a</i>, total lipid and fatty acids of <i>C. lorenzianus</i>. The growth rate, chlorophyll <i>a</i> and total lipids production, and MUFA (monounsaturated fatty acid) composition were significantly higher in the CaP<sub>2</sub>H<sub>4</sub>O<sub>8&#xa0;</sub>group when compared to K<sub>2</sub>HPO<sub>4</sub>&#xa0;and KH<sub>2</sub>PO<sub>4</sub>&#xa0;groups. The optimal concentration of CaP<sub>2</sub>H<sub>4</sub>O<sub>8</sub>&#xa0;for growth, chlorophyll <i>a</i> and total lipid accumulation was 1.00&#xa0;mg L<sup>−1</sup>, and the optimum concentration for PUFA (Polyunsaturated fatty acid), EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) were 2.00&#xa0;mg L<sup>−1</sup>.&#xa0;The results of this study provide important theoretical guidance for the future development and utilization of <i>C. lorenzianus</i>, including algal culture, optimization of fatty acid composition, and have great potential economic value in the field of feed and food development.</p>

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Effects of phosphorus sources on the growth, chlorophyll a and total lipids production, and fatty acids composition in Chaetoceros lorenzianus

  • 期刊论文

  • 发表日期：

    2025年3月27日

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  • Jinping Zhang,
  • Xinyi Xia,
  • Jiayu Wang,
  • Xu Chen,
  • Jiamei Li,
  • Guoquan Zeng,
  • Xuemei Duan,
  • Qingxi Han,
  • Ruibing Peng

摘要

In order to optimize the culture conditions of the diatom Chaetoceros lorenzianus, effects of phosphorus sources (K2HPO4, KH2PO4, CaP2H4O8) and phosphorus concentrations (0.50, 1.00, 1.50, 2.00, 2.50, 3.00 mg L−1) on C. lorenzianus were studied. The results showed that phosphorus sources and phosphorus concentrations had significant effects on the growth, chlorophyll a, total lipid and fatty acids of C. lorenzianus. The growth rate, chlorophyll a and total lipids production, and MUFA (monounsaturated fatty acid) composition were significantly higher in the CaP2H4O8 group when compared to K2HPO4 and KH2PO4 groups. The optimal concentration of CaP2H4O8 for growth, chlorophyll a and total lipid accumulation was 1.00 mg L−1, and the optimum concentration for PUFA (Polyunsaturated fatty acid), EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) were 2.00 mg L−1. The results of this study provide important theoretical guidance for the future development and utilization of C. lorenzianus, including algal culture, optimization of fatty acid composition, and have great potential economic value in the field of feed and food development.