Effect of temperature on total lipid content and fatty acid composition in six strains of Chrysophyta

Abstract

To determine the suitable temperature of and total lipid content and fatty acid composition in six strains of Chrysophyta and provide a scientific basis for its comprehensive utilization and development. The effects of temperatures on the growth were studied and their total lipid content and fatty acid composition were analyzed. The results showed that the most suitable growth temperature range of I. galbana (Tahitianstrain) H29 was 25 ~ 30 ℃, I. galbana 3011 was 25 ~ 30 ℃, I. galbana 3010 and I. zhanjiangensis were 25 ~ 35 ℃, I. galbana 8701 was 15 ℃, and I. galbana (daxidi) was 20 ~ 25 ℃. There were significant differences in total lipids and fatty acids contents in six strains of Chrysophyta. The contents of total lipids in the six strains of Chrysophyta were 17.47%~29.73%. Seventeen kinds of fatty acids were detected in six Chrysophyta, PUFAs accounted for 34.64%~57.03% of the total fatty acids. DHA accounted for 12.96 ~ 21.54%.