Enriching marine macroalgae with eicosatetraenoic (arachidonic) and eicosapentaenoic acids by chilling
Enriching marine macroalgae with eicosatetraenoic (arachidonic) and eicosapentaenoic acids by chilling
复制标题
通过冷却使海洋大型藻类富含二十碳四烯酸（花生四烯酸）和二十碳五烯酸
DOI：
10.1007/bf00169763
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发表时间：
1991
影响因子：
5
通讯作者：
S. Radwan
中科院分区：
文献类型：
--
作者：
R. Al;F. Hantash;S. Radwan
本文报道了采自阿拉伯湾的12种大型藻类，分属于绿藻门、褐藻门和红藻门。分析田间样品和首先在5° C和24° C光照下孵育1周的样品的脂质和脂肪酸。在绿藻门和褐藻门中，一些代表在5° C下积累更多的脂质，而另一些代表在24° C下积累更多的脂质。所有的藻类样品具有相似的脂质组成，只有数量上的差异。温度没有一个共同的影响，代表性的藻类的脂质组成，虽然在特定类别的相对浓度的变化记录。褐藻门和红藻门通常比绿藻门富含二十碳四烯酸（20：4）和二十碳五烯酸（20：5），但亚麻酸（18：3）较少。在大多数藻类中，在5° C下孵育与降低棕榈酸（16：0）在总脂质中的比例相关，并且，但仅在褐藻门和红藻门中，增加20：4和20：5的浓度。这些多不饱和脂肪酸在褐藻门和红藻门的单半乳糖基二酰基甘油（MGDG）和双半乳糖基二酰基甘油（DGDG）中含量较高，而绿藻门的MGDG和DGDG中富含18：3和十六碳三烯酸（16：3）。
SummaryTwelve macroalgae belonging to the Chlorophyta, Phaeophyta and Rhodophyta were collected from the Arabian Gulf. Field samples and samples that were first incubated at 5° C and 24° C in the light for 1 week were analysed for lipids and fatty acids. The lipid contents varied according to the macroalga and, within the Chlorophyta and Phaeophyta, some representatives accumulated more lipids at 5° C and others at 24° C. All samples of algae had similar lipid composition with only quantitative differences. The temperature did not have a common effect on the lipid composition of representative algae, although changes in the relative concentration of specific classes were recorded. The Phaeophyta and Rhodophyta were as a rule richer than the Chlorophyta in eicosatetranoic (20:4) and eicosapentaenoic (20:5) but poorer in linolenic (18:3) acids. In most of the algae, incubation at 5° C was associated with lowering the proportion of palmitic acid (16:0) in the total lipids, and, but only in the Phaeophyta and Rhodophyta, increasing the concentration of 20:4 and 20:5. These polyunsaturated fatty acids occurred in high levels in monogalactosyldiacylglycerols (MGDG) and digalactosyldiacylglycerols (DGDG) of the Phaeophyta and Rhodophyta but not the Chlorophyta, the MGDG and DGDG of which were rich in 18:3 and hexadecatrienoic acid (16:3).