Biochemical characterization of new microalgal strains that are isolated from diverse environmental conditions is an important starting point for the establishment of high‐quality feedstock for nutraceutical and pharmaceutical applications. In this research study, the biochemical composition of three Iranian native subspecies of Scenedesmus microalgae (Scenedesmus obliquus, Scenedesmus bijugusi, and Scenedesmus sp.), with the main focus on fatty acid composition, was studied. The results showed that the strain Scenedesmus bijugusi had the highest biomass productivity (48 g/L/d), biomass (0.73%), carbohydrate (13.97%), fat (16.27%), protein (44.04%), chlorophyll‐a (6.32 mg/g), and carotenoids (3.7 mg/g). The lipid profile also revealed that S. obliquus had the highest percentage of polyunsaturated fatty acid (46.52%), ratio of ∑n‐3/∑n‐6 (5.96), ratio of polyunsaturated fatty acid to saturated fatty acid (PUFA/SAF) (1.18), α‐linolenic acid (22.74%), hypocholesterolemia index (1.61), and low atherogenic index (0.34). S. bijugusi and S. obliquus, thus, showed a great promise in nutraceutical and pharmaceutical applications due to their appropriate high productivity, biopigment, protein, lipid, antioxidant activity, long‐chain polyunsaturated fatty acids, and α‐linolenic acid.

中文翻译：

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栅藻分离物的生化特征，主要关注脂肪酸特征


从不同环境条件中分离出的新微藻菌株的生化特征是建立用于营养保健品和制药应用的高质量原料的重要起点。在这项研究中，研究了伊朗本土微藻栅藻亚种（Scenedesmus obliquus、Scenedesmus bijugusi 和 Scenedesmus sp.）的生化组成，主要关注脂肪酸组成。结果表明，该菌株的生物量生产率最高（48 g/L/d），生物量（0.73%）、碳水化合物（13.97%）、脂肪（16.27%）、蛋白质（44.04%）、叶绿素-a（ 6.32 毫克/克）和类胡萝卜素（3.7 毫克/克）。脂质谱还显示，斜生鱼的多不饱和脂肪酸百分比最高（46.52%），Σn-3/Σn-6 比率（5.96），多不饱和脂肪酸与饱和脂肪酸比率（PUFA/SAF） ）（1.18）、α-亚麻酸（22.74%）、低胆固醇血症指数（1.61）和低动脉粥样硬化指数（0.34）。因此，S. bijugusi 和 S. obliquus 由于其适当的高生产力、生物色素、蛋白质、脂质、抗氧化活性、长链多不饱和脂肪酸和 α-亚麻酸，在营养保健品和药物应用中显示出巨大的前景。