Euchlorocystis marina, a new marine species of the genus Euchlorocystis discovered in 2022, has the potential to improve the water quality in mariculture ponds. However, the effects of salinity on the growth, physiology, and biochemical composition of these algae are not well understood. In this study, changes in physiological and biochemical indices such as cell density, photosynthetic pigment, polysaccharide, and lipid content of E. marina under different salinity treatments were analyzed. The results showed that the highest cell density was observed at a salinity of 15‰. The lowest photosynthetic pigment content was observed at a salinity of 60‰, and the highest polysaccharide and lipid content was observed at a salinity of 60‰. These results indicated that lower salinity was more conducive to E. marina reproduction and growth. E. marina can accumulate polysaccharides and lipids in high salinity environments. This study provides new information for understanding the salinity adaptation strategies of E. marina and has practical significance for its development and utilization.

中文翻译：

---

盐度对微藻真绿囊藻生长及生理生化成分的影响


真绿藻藻是 2022 年发现的真绿藻属海洋新物种，具有改善海水养殖池塘水质的潜力。然而，盐度对这些藻类的生长、生理和生化成分的影响尚不清楚。本研究分析了不同盐度处理下大肠杆菌细胞密度、光合色素、多糖、脂质含量等生理生化指标的变化。结果表明，在盐度为15‰时，细胞密度最高。盐度60%时光合色素含量最低，盐度60%时多糖和脂质含量最高。这些结果表明，较低的盐度更有利于大肠杆菌的繁殖和生长。 E. marina 在高盐度环境中可以积累多糖和脂质。本研究为认识E. marina的盐度适应策略提供了新的信息，对其开发利用具有实际意义。