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| Content Provider | Springer Nature Link |
|---|---|
| Author | Liu, Tingting Liu, Fei Wang, Chao Wang, Zhenyao Li, Yuqin |
| Copyright Year | 2016 |
| Abstract | A model of heterotrophy and nutrition-limitation transition cultivation for efficient algal biomass and lipid production was proposed in this study, wherein sufficient robust heterotrophic-seed cells submitted into nitrogen-starvation induction for boosted lipid accumulation. The results demonstrated that heterotrophic-seed (HS) achieved specific growth rate of 1.35 day$^{−1}$ and biomass productivity of 1.93 mg/L/d, representing 6.42- and 32.16-fold, 2.01- and 2.75-fold more than that of photoautotrophic-seed (PS) and mixtrophic-seed (MS). Even though subsequent nutrition-limitation cultivation repressed the growth of HS, the overall lipid productivity caused by nitrogen-starvation was not offset by biomass loss. The most favorable lipid productivity (465.61 mg/L/d) of HS was 3.25 and 52.31 times higher than that of MS and PS. The high content of monounsaturated fatty acids (50.13%) over saturated and polyunsaturated fatty acids (totally 47.39%) in HS cells could provide superior oxidation stability and lower viscosity for biofuels generated from algal biomass feedstock. These findings suggested the feasibility of using heterotrophy and nutrition-limitation transition cultivation for enhancing the overall lipid productivity. Further, several critical enzymes (i.e. G3PDH, ME, and ACAD) were highly related to lipid accumulation and showed especially pronounced up-regulation or down-regulation expression in HS, which provide indications for shedding light on the molecular mechanisms of lipid accumulation and a prospective metabolic engineering for lipid production. |
| Starting Page | 1 |
| Ending Page | 13 |
| Page Count | 13 |
| File Format | |
| ISSN | 09593993 |
| Journal | World Journal of Microbiology and Biotechnology |
| Volume Number | 32 |
| Issue Number | 12 |
| e-ISSN | 15730972 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2016-10-31 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Chlorella vulgaris Heterotrophy and nutrition-limitation transition cultivation Lipid accumulation Regulatory enzymes Applied Microbiology Biotechnology Biochemistry Environmental Engineering/Biotechnology Microbiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Medicine Applied Microbiology and Biotechnology Biotechnology |
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