Effect of gibberellin on some fatty acid profiles under nitrogen starvation in green algae chlorella vulgaris

Abstract

Plant growth substances could be stimulating algal growth rate and alter lipid compositions. In the present study, we tested hypothesis that exogenous gibberellin (GA) has any effect on growth rate and some fatty acid profiles in green algae Chlorella vulgaris. In Bold Basal Medium with 100 µM GA3, cell density increased to 68.57% on third day as compared to the control cells. These results indicated that GA3 enhanced microalgal growth and cell size. The lipid profile was also altered compared to control using Gas Chromatography-Mass Spectrometry (GC-MS). GA3 promotes the production of C16:0, C18:0, C18:1 and C18:3 on day-3 and-5. Under nitrogen starvation condition, application of GA3 provide enhanced algae growth and stimulated C16:0 and C18:1 production. In conclusion, this study demonstrated that gibberellin could be a good candidate as a hormone for increasing lipid production in microalgae culture system. © IJSM 2021