十四株海洋微藻脂肪酸组成的研究

Fatty Acid Composition of 14 Strains of Marine Microalgae

对 4个门的 14株 (红藻门 8株 ,甲藻门 1株 ,隐藻门 2株 ,绿藻门 3株 )海洋微藻进行了脂肪酸含量测定 ,微藻在确定的条件下生长 ,指数生长末期收获。结果表明 ,各门的微藻都有其独特的脂肪酸特征 :红藻中含有大量的 2 0 :4 n- 6和 2 0 :5n- 3,其中紫球藻 R2 5含量最高 ,占总脂肪酸的4 9.8% (AA占总脂肪酸的 2 0 .5% ,EPA占总脂肪酸的 2 9.3% )。隐藻的主要脂肪酸是 16 :0、18:1n- 9、18:3n- 3、18:4 n- 3、2 0 :5n- 3、2 2 :5n- 3。与其它甲藻有别的虫黄藻 ,18:4 n- 3含量很少并且不含EPA,其主要合成的是 16 :0、18:1n- 9和 2 2 :6 n- 3。 C16和 C18的不饱和脂肪酸是本实验研究的

The Fatty acid (FA) composition of 14 strains of marine microalgae from four taxonomic divisions were examined. The microalgae were grown under defined conditions and harvested during a late log phase. The result indicated that each phylum of microalgae was characterized by a specific fatty acid profile. Significant concentrations of 20:4n-6 and 20:5n-3 were present in the red microalgae, Porphyridium sp. with the highest proportion in R 25 (49.8%). The major fatty acids in two species of Chroomonas were 16:0, 18:1 18:3n-3, 18:4n-3 and 20:5n-3. In Zooxanthella microadriatica, the fatty acid composition is different from that of other dinoflagellates. Z. microdriatica contains little 18:4n-3 and no EPA, its major fatty acids are 16:0, 18:1 and 22:6n-3. 16-and 18-carbon unsaturated fatty acids are important components in 3 green alga strains examined.