Abstract
Effects of high light, high salt, nitrogen and phosphorus deficiency on growth and lipid production of Chlorella pyrenoidosa were investigated in a flat-plate photoreactor, and the oil quality indexes such as CN, IV, SV, CFPP, DU, and LCSF were also evaluated. The results show that the growth of C. pyrenoidosa was inhibited under the stress conditions, but the intracellular lipid content was significantly increased. Moreover, the combustion performance, oxidation stability, low temperature fluidity, and other oil quality indicators under these nutrient stress conditions were significantly improved. Importantly, it is found that starch was preferentially synthesized by algal cells, while with the prolongation of stress time, starch was gradually degraded, and the degraded carbon skeleton was mainly used for lipid synthesis.
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Acknowledgements
The present study was supported by Talent introduction project of Sichuan University of Science and Engineering (2018RCL24), Key Laboratory of fine chemicals and surfactant in Colleges and universities of Sichuan Province (2018JXY05), Sichuan Science and Technology Department Project (2019YJ0463), Innovation and entrepreneurship training program for College Students (S201910622037; cx2019050), and Postgraduate course construction project (AL201901).
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Dong, L., Li, D. & Li, C. Characteristics of lipid biosynthesis of Chlorella pyrenoidosa under stress conditions. Bioprocess Biosyst Eng 43, 877–884 (2020). https://doi.org/10.1007/s00449-020-02284-x
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DOI: https://doi.org/10.1007/s00449-020-02284-x