Microalgae not only fix carbon dioxide, but also represent a promising alternative resource for the production of proteins, lipids, and polysaccharides. This study employed two Porphyridium strains to compare their responses under different light qualities. P. purpureum up-regulated the content (up to 69.37 ± 0.92 mg/g DW) and proportion of phycoerythrin to enhance light absorption, which led to the accumulation of total soluble proteins, neutral lipids and exopolysaccharides under blue light. In contrast, P. aerugineum primarily improved the light energy utilization by increasing phycocyanin levels (up to 81.10 ± 0.60 mg/g DW), resulting in the degradation of neutral lipids and the accumulation of exopolysaccharides. Given the biomass, the highest yields of phycoerythrin (169.61 ± 2.90 mg/L) and phycocyanin (216.92 ± 1.90 mg/L) were achieved by P. purpureum and P. aerugineum cultured under white light, respectively. These findings indicate that Porphyridium can serve as a valuable resource for phycobiliprotein production, with biomolecules synthesis being tightly regulated by light quality.

中文翻译：

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探索紫卟啉和铜绿卟啉作为藻胆蛋白生产的替代资源


微藻不仅可以固定二氧化碳，而且还是生产蛋白质、脂质和多糖的有前途的替代资源。本研究采用两种卟啉菌株来比较它们在不同光照质量下的响应。紫红霉上调藻红蛋白含量 （高达 69.37 ± 0.92 mg/g DW） 和比例，增强光吸收，导致蓝光下总可溶性蛋白、中性脂质和胞外多糖积累。相比之下，铜绿假单胞菌主要通过提高藻蓝蛋白水平 （高达 81.10 ± 0.60 mg/g DW） 来提高光能利用率，导致中性脂质降解和胞外多糖积累。在生物量下，白光下培养的藻红蛋白 （169.61 ± 2.90 mg/L） 和藻蓝蛋白 （216.92 ± 1.90 mg/L） 的产量最高。这些发现表明，卟啉可以作为藻胆蛋白生产的宝贵资源，生物分子合成受到光质量的严格调节。