The impact of nitrogen starvation on the dynamics of triacylglycerol accumulation in nine microalgae strains
The impact of nitrogen starvation on the dynamics of triacylglycerol accumulation in nine microalgae strains
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DOI：
10.1016/j.biortech.2012.08.003
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发表时间：
2012-11-01
影响因子：
11.4
通讯作者：
Wijffels, Rene H.
中科院分区：
文献类型：
--
作者：
Breuer, Guido;Lamers, Packo P.;Wijffels, Rene H.
微藻衍生的脂质是植物油和化石油的替代品，但脂质含量和质量因微藻菌株而异。因此，选择合适的脂质生产菌株至关重要。根据已发表的96个物种的结果，选择了9个菌株，研究其生物量，总脂肪酸，和三酰甘油（TAG）生产氮充足和缺乏的培养条件下。在缺氮条件下，小球藻，小球藻zofingiensis，新绿球藻olioabundans，和栅藻，积累超过35%的干重作为TAG。棕榈酸和油酸是产生的主要脂肪酸。这些菌株之间的主要差异是产生的生物量（干重增加3.0-7.8倍）和氮耗尽后生物量生产力保持的持续时间（2-7天）。S. UTEX 393和C. zofingiensis（UTEX B32）显示出最高的平均TAG生产率（322和243 mg l（-1）/天）。(C)2012爱思唯尔有限公司版权所有。
Microalgae-derived lipids are an alternative to vegetable and fossil oils, but lipid content and quality vary among microalgae strains. Selection of a suitable strain for lipid production is therefore of paramount importance. Based on published results for 96 species, nine strains were selected to study their biomass, total fatty acid, and triacylglycerol (TAG) production under nitrogen-sufficient and deficient cultivation conditions. Under nitrogen-deficient conditions, Chlorella vulgaris, Chlorella zofingiensis, Neochloris oleoabundans, and Scenedesmus obliquus, accumulated more than 35% of their dry weight as TAGs. Palmitic and oleic acid were the major fatty acids produced. The main difference between these strains was the amount of biomass that was produced (3.0-7.8-fold increase in dry weight) and the duration that the biomass productivity was retained (2-7 days) after nitrogen depletion. S. obliquus (UTEX 393) and C. zofingiensis (UTEX B32) showed the highest average TAG productivity (322 and 243 mg l(-1) day(-1)). (C) 2012 Elsevier Ltd. All rights reserved.