LIPIDS OF THE RED ALGA, PALMARIA-PALMATA
LIPIDS OF THE RED ALGA, PALMARIA-PALMATA
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DOI：
10.1515/botm.1993.36.2.169
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发表时间：
1993-03-01
期刊：
影响因子：
2.2
通讯作者：
CRAIGIE, JS
中科院分区：
文献类型：
--
作者：
MISHRA, VK;TEMELLI, F;CRAIGIE, JS
研究了野生和人工栽培掌叶藻的近似组成以及温度、收获时间和氮剥夺对掌叶藻脂类和脂肪酸组成的影响。两个菌株的总脂含量分别为2.0%和1.8%（干重基础）。与野生菌株相比，培养菌株显示出增加的蛋白质和灰分积累。肉豆蔻酸、棕榈酸和二十碳五烯酸（EPA）是野生和培养菌株中的主要脂肪酸，其中18：1 ω-7等于或超过培养菌株中肉豆蔻酸的水平。不饱和脂肪酸（包括EPA）随收获时间的变化没有明显趋势。在11 ℃时，相对于初始和氮充足的对照，在氮剥夺培养物中C18不饱和脂肪酸倾向于增加。氮缺乏在11摄氏度导致在脂质和EPA含量的减少，而饱和脂肪酸的浓度保持不变。甘油三酯和游离脂肪酸的主要水库的多不饱和脂肪酸，包括EPA的两种菌株。
Proximate composition of wild and cultured strains of Palmaria palmata and the effect of temperature, time of harvest and nitrogen deprivation were studied with an emphasis on lipids and fatty acids. Total lipid content of the two strains were 2.0 and 1.8% (dry weight basis), respectively. The cultured strain showed increased accumulation of protein and ash in comparison to the wild strain. Myristic, palmitic and eicosapentaenoic acids (EPA) were major fatty acids in both wild and cultured strains with 18:1 omega-7 equalling or exceeding the level of myristic acid in the cultured strain. No major trends were noted in unsaturated fatty acids including EPA with time of harvest. The C18 unsaturated fatty acids tended to increase in nitrogen deprived cultures relative to the initial and nitrogen-sufficient controls at 11-degrees-C. Nitrogen deficiency at 11-degrees-C resulted in a decrease in lipid and EPA contents, while the concentration of saturated fatty acids remained constant. Triglycerides and free fatty acids were the main reservoirs of polyunsaturated fatty acids including EPA for both strains.