Seasonal variation in lipid and fatty acid composition of ice algae from the Barents Sea
Seasonal variation in lipid and fatty acid composition of ice algae from the Barents Sea
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DOI：
10.1007/s003000050275
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发表时间：
1998-06
期刊：
影响因子：
1.7
通讯作者：
R. Henderson;E. N. Hegseth;M. T. Park
中科院分区：
文献类型：
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作者：
R. Henderson;E. N. Hegseth;M. T. Park
对巴伦支海春、秋季冰藻中性脂、糖脂和磷脂组分的脂肪酸组成进行了季节性差异分析。冰藻组合以硅藻为主。春季以冷菱形藻为主，秋季以休眠期的生物斑海链藻和弯曲辐环藻为主。除了一个春天的样品，中性脂质占主导地位的糖脂和磷脂在所有的藻类样品。脂质组分显示特征脂肪酸组成。在春季样品中，中性脂质组分的主要脂肪酸为16：0、16：1（n-7）和20：5（n-3），而糖脂组分的特征在于较高水平的20：5（n-3）和C16多不饱和脂肪酸，特别是16：4（n-1）。磷脂中22：6（n-3）的含量高于其他两种脂质组分，但20：5（n-3）仍是主要的多不饱和脂肪酸。在秋季样品中，中性脂质组分含有较高比例的饱和脂肪酸和16：1（n-7）比两个极性脂质组分和22：6（n-3）是最丰富的磷脂。与春季样品，20：5（n-3）是主要的多不饱和脂肪酸在所有脂质组分的秋季藻类。总体而言，从春季和秋季藻类样品的脂质组分的脂肪酸组成是相似的，是一致的硅藻的主要群体在冰藻研究。在春季和秋季样品中观察到的高水平的中性脂质表明，中性脂质的生产是冰藻的特点，无论季节。然而，由于秋季样品的中性脂质含量主要含有A. curvatulus显著高于T. bioculatapredominated.
The fatty acid compositions of neutral lipid, glycolipid and phospholipid fractions from ice algae sampled from the Barents Sea in spring and autumn were examined for seasonal differences. The ice-algal assemblages were dominated by diatoms. In spring,Nitzschia frigidawas the most common species whereas resting stages ofThalassiosira bioculataandActinocycluscfcurvatuluspredominated in autumn. With the exception of one spring sample, neutral lipids predominated over glycolipids and phospholipids in all algal samples. The lipid fractions displayed characteristic fatty acid compositions. In the spring samples the major fatty acids of the neutral lipid fraction were 16:0, 16:1(n-7) and 20:5(n-3) whilst the glycolipid fraction was characterised by higher levels of 20:5(n-3) and C16 polyunsaturated fatty acids, particularly 16:4(n-1). Phospholipids contained higher levels of 22:6(n-3) than the other two lipid fractions although 20:5(n-3) was still the major polyunsaturated fatty acid. In the autumn samples, the neutral lipid fraction contained higher proportions of saturated fatty acids and 16:1(n-7) than the two polar lipid fractions and 22:6(n-3) was most abundant in phospholipids. As with the spring samples, 20:5(n-3) was the major polyunsaturated fatty acid in all lipid fractions of the autumn algae. Overall, the fatty acid compositions of the lipid fractions from spring and autumn algal samples were similar and are consistent with diatoms being the predominant group in the ice algae studied. The high level of neutral lipids observed in both spring and autumn samples suggests that the production of neutral lipids is characteristic of ice algae regardless of season. Nevertheless, some species-specific differences in lipid production may exist since the neutral lipid content of autumn samples containing mainlyA. curvatuluswas substantially higher than those in whichT. bioculatapredominated.