Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7069085 | Bioresource Technology | 2018 | 35 Pages |
Abstract
Salinity stress has been verified to be a successful approach to enhance lipid production in high-starch marine algae, and salinity-induced carbon flow switching has been proposed as an algal response specific to brackish water. With the aim of testing this assumption, Chlorella sorokiniana SDEC-18, a low-starch freshwater alga, was grown in BG11 medium with NaCl addition at various concentrations (0, 2, 5, 10, 20, and 30â¯g/L). The results showed that salinity stress promoted carbon redistribution and starch conversion to lipid. The most desirable lipid productivity of 19.66â¯mg/L·d occurred in the medium with 20â¯g/L NaCl, about 2.16â¯times as high as that in the BG11 medium control. Moreover, microalgae with salinity stress were able to produce biodiesel with a more suitable cloud point, due to a decrease in the saturated fatty acid content. This therefore confirms that low-starch freshwater microalgae can also carry out salinity-induced carbon flow switching.
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Authors
Lijie Zhang, Haiyan Pei, Shuaiqi Chen, Liqun Jiang, Qingjie Hou, Zhigang Yang, Ze Yu,