Effect of phosphorus on lipid accumulation in freshwater microalga Chlorella sp

Microalgae have already been investigated as a potential resource for biofuel in many reports. In this study, the effect of phosphorus concentration on lipid content was analyzed using the freshwater microalga Chlorella sp as a model. In addition, the carbohydrate and protein content were also analy...

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Bibliographic Details
Published in:Journal of applied phycology 2013-02, Vol.25 (1), p.311-318
Main Authors: Liang, Kehong, Zhang, Qinghua, Gu, Ming, Cong, Wei
Format: Article
Language:English
Subjects:
Accumulation
Biochemical composition
Biofuels
Biomedical and Life Sciences
Chlorella
Ecology
Freshwater & Marine Ecology
Growth media
Life Sciences
Microalgae
Phosphorus
Plant Physiology
Plant Sciences
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Summary:Microalgae have already been investigated as a potential resource for biofuel in many reports. In this study, the effect of phosphorus concentration on lipid content was analyzed using the freshwater microalga Chlorella sp as a model. In addition, the carbohydrate and protein content were also analyzed in order to investigate the variations of biochemical composition under different phosphorus levels. Results showed that both lipid content and lipid productivity were increased under low phosphorus conditions. Furthermore, it was also found that lipid accumulation in cells decreased by supplementing the growth media with K 2 HPO 4 in the late growth phase. The analysis of the total protein and the carbohydrate content showed that the former remained unaffected by external phosphorus variation; while the latter was directly correlated to phosphorus concentration. In summary, lipid accumulation had significant relationship with phosphorus concentration.
ISSN:0921-8971
1573-5176
DOI:10.1007/s10811-012-9865-6