The ability of algae to produce lipids comprising of unsaturated fatty acids varies with strains and culture conditions. This study investigates the effect of temperature on the production of unsaturated fatty acids in Scenedesmus sp. grown on oil crop residue based medium. At low temperature (10 °C), synthesis of lipids compromising of high contents of unsaturated fatty acids took place primarily in the early stage while protein accumulation mainly occurred in the late stage. This stepwise lipid-protein synthesis process was found to be associated with the contents of acetyl-CoA and α-KG in the algal cells. A mechanism was proposed and tested through simulation experiments which quantified the carbon flux allocation in algal cells at different cultivation stages. It is concluded that low culture temperature such as 10 °C is suitable for the production of lipids comprising of unsaturated fatty acids.
Bibliographical noteFunding Information:
This study was supported by the National Natural Science Foundation of China (No. 51668044), the Key Research Development Program of the Jiangxi Province of China (20161BBH80029), Science Foundation for Youths of Jiangxi Province, China (No. 20171BAB216037), the Key Science and Technology Research Foundation of Education Bureau of the Jiangxi Province of China (No.150029, GJJ160214), and a grant from the China Postdoctoral Science Foundation (No. 2016 M591188).
- Carbon allocation
- Oil crop residue
- Scenedesmus sp.
- Unsaturated fatty acids