一种新的海洋经济微藻——粉核油球藻

A new marine microalgae of Pinguiococcus pyrenoidosus

以Pinguiococcus pyrenoidosus CCMP 2004为实验藻种,研究分析了藻粉的基本生化组成和培养周期中PUFAs组成与含量的动态变化。结果表明,该藻的蛋白质量分数为37.54%,粗脂肪为27.45%,其中PUFAs包括18:2,18:3,18:4,20:4(AA,Arachidonic acid),20:5(EPA,Eicosapentaenoic acid),22:4(DTA,Docosatetraenoic acid)和22:6(DHA,Docosahexaenoic acid)。该藻PUFAs的组成特征是EPA含量高,质量分数为20.93%,其他不饱和脂肪酸(16:3,16:4,18:3和18:4)的含量极微。分析结果显示粉核油球藻的营养价值较高,是一种新的具有商业化开发潜力的海洋微藻。

Pinguiococcus pyrenoidosus is a lately named marine algae, which belong to Pinguiophyceae, Pinguiococcus genara. The characteristic of lipid composition of Pinguiophyceae is high amount of PUFAs especially EPA. This paper reported the biochemical composition, especially the characteristic of PUFAs composition of P. pyrenoidosus CCMP 2004. Analyzing the biochemical composition of this algae, the results show： the protein content was 37.54%, rude lipid content was 27.45% , PUFAs including 18：2, 18：3, 18 ： 4, AA （Arachidonic acid, 20 ： 4）, EPA （Eicosapentaenoic acid, 20 ： 5）, DTA （Docosatetraenoic acid, 22 ： 4）, DHA （Docosahexaenoic Acid, 22：6）. The characteristic of its lipid composition is the high amount of PU- FAs especially EPA, but no （or trace amounts） other fatty acids （16：3, 16：4, 18：3 and 18：4） have been found, and the EPA content was 20.93%. The results indicated the commercial potential in EPA production from P. pyrenoidosus CCMP 2004 because of its higher value in nutrition aspect.