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Photosynthetic efficiency and lipid accumulation are affected by the concentration of carbon in microalgae Micractinium pusillum Y-002

文献类型： 外文期刊

作者： Deng, Xiaodong 1 ; Gu, Bo 1 ; Hu, Xinwen 3 ; Guo, Jianchun 1 ; Fei, Xiaowen 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Trop Crop Biotechnol, Minist Agr, Haikou 571101, Peoples R China

2.Hainan Med Coll, Dept Biochem, Haikou 571101, Peoples R China

3.Hainan Univ, Coll Agron, Haikou 571101, Peoples R China

关键词： Micractinium pusillum;lipid content;photosynthetic efficiency;growth rate;biodiesel

期刊名称：AFRICAN JOURNAL OF BIOTECHNOLOGY （ 影响因子：0.573； 五年影响因子：0.794 ）

ISSN： 1684-5315

年卷期： 2011 年 10 卷 55 期

页码：

收录情况： SCI

摘要： A micro-algae strain was isolated from fresh tropical water in Hainan, China. By phylogenetic analysis with 18S rDNA, we identified it as Micractinium pusillum strain Y-002. To study the relationships between nutrient and lipid accumulation of this strain, we cultured the organism either in complete TAP, SE, BG11 or HSM medium, or media deficient of nitrogen and iron, respectively. HSM media deficient in sulfur, phosphorus (P), magnesium (Mg), potassium (K) or calcium (Ca) were also tested. We found that HSM media, N and S starvation led to significant increase in cellular lipid content; and starvation of Ca and K only resulted in moderate increase of lipid content. Under the HSM-N or HSM-S culture condition, the increase in lipid content was accompanied by marked decrease in photosynthesis efficiency, total protein, and total carbohydrate content. Our investigation of the effect of exogenous carbon on lipid accumulation and photosynthetic efficiency revealed that the cell growth rate, photosynthesis efficiency, and lipid content per volume unit peaked in the presence of 15 mM sodium acetate (NaAC) and higher concentrations of NaAC led to decrease in these physiological traits.

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[1]Novel molecular insights into nitrogen starvation-induced triacylglycerols accumulation revealed by differential gene expression analysis in green algae Micractinium pusillum. Li, Yajun,Fei, Xiaowen,Deng, Xiaodong,Fei, Xiaowen.

[2]Genetic and phenotypic parameter estimates for growth traits of Hainan Black goat in southern China. Zhou, Han-Lin,Xu, Tie-Shan,Rong, Guang,Gu, Li-Hong,Sun, Yan-Yan.

[3]Microalgae: A promising feedstock for biodiesel. Deng, Xiaodong,Li, Yajun,Fei, Xiaowen,Fei, Xiaowen. 2009

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