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Effects of nutrients and light intensity on the growth and biochemical composition of a marine microalga Odontella aurita
Xia Song; Wan Linglin; Li Aifen; Sang Min; Zhang Chengwu
2013
Source PublicationChinese Journal of Oceanology and Limnology
ISSN0254-4059
Volume31Issue:6Pages:1163
AbstractAlgal biotechnology has advanced greatly in the past three decades. Many microalgae are now cultivated to produce bioactive substances. Odontella aurita is a marine diatom industrially cultured in outdoor open ponds and used for human nutrition. For the first time, we have systematically investigated the effects of culture conditions in cylindrical glass columns and flat-plate photobioreactors, including nutrients (nitrogen, phosphorus, silicon, and sulfur), light intensity and light path, on O. aurita cell growth and biochemical composition (protein, carbohydrate, β-1,3-glucan, lipids, and ash). The optimal medium for photoautotrophic cultivation of O. aurita contained 17.65 mmol/L nitrogen, 1.09 mmol/L phosphorus, 0.42 mmol/L silicon, and 24.51 mmol/L sulfur, yielding a maximum biomass production of 6.1–6.8 g/L and 6.7–7.8 g/L under low and high light, respectively. Scale-up experiments were conducted with flat-plate photobioreactors using different light-paths, indicating that a short light path was more suitable for biomass production of O. aurita. Analyses of biochemical composition showed that protein content decreased while carbohydrate (mainly composed of β-1,3-glucan) increased remarkably to about 50% of dry weight during the entire culture period. The highest lipid content (19.7% of dry weight) was obtained under 0.11 mmol/L silicon and high light conditions at harvest time. Fatty acid Profiles revealed that 80% were C14, C16, and C20, while arachidonic acid and eicosapentaenoic acid (EPA) accounted for 1.6%–5.6% and 9%–20% of total fatty acids, respectively. High biomass production and characteristic biochemical composition Profiles make O. aurita a promising microalga for the production of bioactive components, such as EPA and β-1,3-glucan.
KeywordOdontella aurita culture conditions biomass biochemical composition eicosapentaenoic acid (EPA) P-l 3-glucan
Language英语
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/42417
Collection藻类生物学及应用研究中心_期刊论文
Affiliation中国科学院水生生物研究所
Recommended Citation
GB/T 7714
Xia Song,Wan Linglin,Li Aifen,et al. Effects of nutrients and light intensity on the growth and biochemical composition of a marine microalga Odontella aurita[J]. Chinese Journal of Oceanology and Limnology,2013,31(6):1163.
APA Xia Song,Wan Linglin,Li Aifen,Sang Min,&Zhang Chengwu.(2013).Effects of nutrients and light intensity on the growth and biochemical composition of a marine microalga Odontella aurita.Chinese Journal of Oceanology and Limnology,31(6),1163.
MLA Xia Song,et al."Effects of nutrients and light intensity on the growth and biochemical composition of a marine microalga Odontella aurita".Chinese Journal of Oceanology and Limnology 31.6(2013):1163.
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