| 摘要: |
| 海藻中含有大量的长链和不饱和度很高的脂肪酸(Lovern,1936)。由于海藻受生长环境的影响,其中脂肪酸特別是高度不饱和脂肪酸(PUFA)的组成与高等植物和淡水藻等有很大的区别,有许多值得研究和探讨之处,近年来已成为海藻化学研究的热点。应当指出的是,由于海洋动物自身不能合成PUFA,其体内的PUFA是通过食物链从海藻中摄取的,所以可以认为海藻是海洋脂肪酸的原始生产者,也是研究不饱和脂肪酸的合成和转化的主要环节。
马尾藻是海洋中分布范围广且产量高的大型海藻,作者研究马尾藻脂肪酸的组成,不仅着眼于其理论意义,而且更注重它的实际应用价值。本文采用我国广西北部湾的马尾藻,利用气相色谱法(GC)较系统地分析测定了8种习见的马尾藻中脂肪酸的组分,就其在不同种类中的含量分布、饱合及不饱和脂肪酸的存在比例等组成特点进行了研究,并与褐藻类的海带、红藻类的条斑紫菜以及绿藻类的孔石莼进行了比较,从而获得了马尾藻脂肪酸组成的基础数据,为开发利用这一宝贵资源提供了有效的理论依据。 |
| 关键词: 广西北部湾、马尾藻、脂肪酸 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第2411号 |
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| STUDIES ON THE COMPOSITION OF FATTY ACID IN SARGASSUM FROM BEIBU BAY GUANGXI |
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Han Lijun, Fan Xiao, Zhou Tiancheng, Lou Qingxiang, Zhang Yanxia
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| Gas chromatography method was used to determine the content of fatty acids in eight Sargassum species from Guangxi Beibu Bay for comparison with that of Laminaria japonica, Porphyra yezoensis Veda and Ulva pertusa Kjellm. The results were as follows: 1. The predominant saturated fatty acid in all Sargassum were palmitic acid (16: 0)whose content was about 33-50% of total fatty acids. 2. The composition of C18 polyunsaturated fatty acids (PUFA) in the Sargassum were more than that of Porphyra vezoensis. Main PUFA were Linoleic acid (18: 2ω6, LA) and Alpha-Linolenic acid (18: 3ω3, ALA) whose average content comprised 21-26% of total fatty acids. Eicosatetraenoic acid (Arachidonic acid, 20: 4ω6, AA) and Eicosapentaenoic acid (20: 5ω3, EPA) are useful for the human body and comprise 10% (average content)in Sargassum, 5.3-14.7% of them is AA, 1.14-3.78% is EPA.3. The content of PUFA in Sargassum was higher than that in Laminaria japonica and the some as that in Ulva pertusa Kjellm. In these seaweeds studied Porphyra vezoenosis has the highest PUFA content. |
| Key words: Sargassum,Guangxi Beibu Bay,fatty acids |
