On the bio-rearrangement into fully saturated fatty acids-containing triglyceride in Aurantiochytrium sp.

摘要

A strain of Aurantiochytrium sp. was grown in media with various concentrations of glucose to monitor triglyceride production as a potential source of oil for biodiesel. The fatty acid composition of triglyceride in the strain was unique, because the fatty acids consisted of only 6 molecular species, and the major species were myristic, pentadecanoic, palmitic, heptadecanoic, docosapentaenoic, and docosahexaenoic acids. When cells were cultured in glucose-rich (over 9%) medium for 4 days, the triglyceride yields were 0.5-1.0 g/L. After culture for 4 days, the fatty acid composition of triglyceride was nearly identical in all cells grown in media containing various concentrations of glucose. However, when cells were grown in medium containing 12% glucose for 12 days, unique triglyceride containing only saturated fatty acids accumulated. This bio-rearrangement into fully-saturated fatty acids-containing triglyceride may be utilized for the preparation of biodiesel oil.