The effects of elevated CO2 concentrations on changes in fatty acids and amino acids of three species of microalgae

文献类型： 外文期刊

第一作者： Liang, Chengwei

作者： Liang, Chengwei;Wang, Lu;Zhang, Yufei;Zhang, Jian;Zhang, Xiaowen;Ye, Naihao;Zhang, Xiaowen;Ye, Naihao

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关键词： Amino acid; Carbon dioxide; Chlamydomonas reinhardtii; Dunaliella salina; Fatty acid; Nannochloropsis oceanica

期刊名称：PHYCOLOGIA （ 影响因子：2.857； 五年影响因子：2.548 ）

ISSN： 0031-8884

年卷期：

页码：

收录情况： SCI

摘要： Microalgae are important producers in aquatic ecosystems and are valuable for biodiesel production and feed supply industries. Three such microalgae, Nannochloropsis oceanica (Eustigmatophyceae), Dunaliella salina (Chlorophyceae), and Chlamydomonas reinhardtii (Chlorophyceae), were cultured at two pCO(2) (400 ppm, 1000 ppm) to investigate changes in fatty acid and amino acid composition. Elevated pCO(2) increased C16:0, C18:3, C20:5, total saturated fatty acid (SFA), total polyunsaturated fatty acid (PUFA), and total essential amino acid (EAA) content in N. oceanica. High CO2 concentration reduced C16:0 and total SFA content, but increased C18:3, total PUFA, and total EAA accumulation, in D. salina. Changes in C. reinhardtii were the opposite of those in D. salina. Results indicated that higher pCO(2) may improve the quality of biodiesel produced by N. oceanica and C. reinhardtii. Furthermore, in N. oceanica and D. salina, increased CO2 concentration elevated nutrient levels but resulted in reduced nutrient quality in C. reinhardtii. Our results can help predict nutritional changes in microalgae at elevated pCO(2), and provide insight into production of biodiesel and animal feed by microalgae.

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