| 摘要: |
| 对绿藻门和褐藻门8 种大型海藻的脂肪酸组成进行了研究, 发现两类海藻都有其特征脂肪酸或有几种特征脂肪酸组合做为其化学分类的标记。4 种绿藻的主要脂肪酸是16: 0、16: 1ω7、18: 4ω3、18:1ω7、18: 2ω6、18: 3ω3、18: 1ω9, 其中18: 1ω7 和18: 3ω3 的含量相对较高; 4 种褐藻中16: 0、18: 1ω9、18: 2ω6、18: 3ω3、18: 4ω3、20: 5ω3、20: 4ω6 的含量占绝对优势, 十八碳和二十碳多不饱和脂肪酸是褐藻门脂肪酸的典型特征。另外, 褐藻中含有较高含量的EPA, 海带和裙带菜尤为明显。对2 门类5属8 株海藻所含脂肪酸进行聚类分析的结果显示海藻各门及种间的亲缘关系, 表明利用静态条件下海藻脂肪酸的聚类分析结果, 可在一定程度上判别海藻在分类上亲缘关系的远近, 海藻脂肪酸组成的差异可以作为海藻分类的一个辅助技术手段。 |
| 关键词: 脂肪酸 化学分类 绿藻 褐藻 |
| DOI：10.11759/hykx20130530003 |
| 分类号: |
| 基金项目:国家863 资助项目课题(2010AA093701); 中国科学院仪器设备功能开发技术创新项目(yg2010020) |
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| Comparison of fatty acid compositions of four green algae and four brown algae |
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| Abstract: |
| The fatty acid compositions of eight seaweeds from green algae and brown algae were analyzed. Some specific fatty acid profiles of the seaweeds as chemotaxonomy markers were found. The characteristic fatty acids of the four green algae are 16: 0, 16: 1ω7, 18: 4ω3, 18: 1ω7, 18: 2ω6, 18: 3ω3 and 18: 1ω9, and the dominative ones are 18: 1ω7 and 18: 3ω3. The dominative fatty acid profiles of the four brown algaes were 16: 0, 18: 1ω9, 18: 2ω6, 18: 3ω3, 18: 4ω3, 20: 5ω3 and 20: 4ω6. And the representative feature of the brown algae was the higher contents of octadeca-carbon unsaturated fatty acid and twenty-carbon unsaturated fatty acid. In addition, the brown algae contained higher levels of EPA which was more obvious in Laminaria japonica Aresch and Undaria pinnatifida Sur. The analysis result of 8 seaweeds from 5 genus of 2 phylums by carrying out a cluster analysis of fatty acids showed, there is a good truly relationship among these lines to some extent. This study provides evidence that fatty acid compositions of seaweeds may be a good assistive technical method for classification and quantitive evaluation. |
| Key words: fatty acid chemotaxonomy markers green algae brown algae |
