摘要
通过对南极水样中分离出来的 4种南极冰藻 (2种硅藻和 2种绿藻 )在不同温度下的总脂含量和脂肪酸组成的研究 ,发现 2种硅藻 (H1和 H2 )通过增加胞内脂肪含量和不饱和脂肪酸的组成来提高其低温适应性 ,而且单不饱和脂肪酸含量远高于多不饱和脂肪酸 ,发挥主要的作用 ;绿藻 L1的总脂含量变化不大 ,但在低温条件下 ,其不饱和脂肪酸的含量亦相应提高 ;绿藻 L4的总脂含量和脂肪酸组成变化与 2种硅藻相似 ,但 2种绿藻的多不饱和脂肪酸含量远高于单不饱和脂肪酸 ,发挥主要的作用。研究结果还显示 ,低温有利于短链脂肪酸的合成。同时作为膜磷脂重要组成成分的 C2 2∶ 6脂肪酸在 4种冰藻中均保持稳定 ,含量相对较高 。
It is shown from the study on the total lipid content and fatty acid composition of 4 species of Antarctic ice-microalgae that 2 species of diatom (H1 and H2) can improve its low temperature adaptability by increasing the total lipid content and unsaturated fatty acid composition, and the monounsaturated fatty acid content is much more than the polyunsaturated fatty acid content and plays an important role; the temperature has little effect on the total lipid content of green microalgae L1, but its unsaturated fatty acid content increases appropriately under low temperature conditions; the changes in the total lipid content and fatty acid composition of green microalgae L4 are similar to those of 2 species of diatom, but the polyunsaturated fatty acid content of 2 species of green microalgae is much more than their monounsaturated fatty acid content, and plays an important role. It is shown from the study results that the low temperature is advantageous to the synthesis of short-chain fatty acid. As an important component of cell membrane phosphatide, C 22∶6 fatty acid contents in 4 species of ice-microalgae keep higher and stable, which is also an adaptation to the low temperature environment in the Antarctic area.
出处
《黄渤海海洋》
CSCD
北大核心
2002年第1期47-53,共7页
Journal of Oceanography of Huanghai & Bohai Seas
关键词
南极冰藻
低温适应性
总脂
脂肪酸
温度
Antarctic ice-microalgae
low temperature adaptability
total lipid
fatty acid
