The Light Regime Effect on Triacylglycerol Accumulation of Isochrysis zhangjiangensis

The Light Regime Effect on Triacylglycerol Accumulation of Isochrysis zhangjiangensis

FAN Xuran;CAO Xupeng;CHU Yadong;WU Peichun;XUE Song

【期刊名称】《中国海洋大学学报（英文版）》 【年(卷),期】2019(018)002

【摘要】Stress state of microalgal cells is caused under unfavorable conditions such as disordered light regime and depleted nitrogen.The stress state can impair photosynthetic efficiency,inhibit cell growth and result in the accumulation of triacylglycerol (TAG) from protective mechanisms.Continuous light or nitrogen starvation was applied on microalgae and performed effectively on inducing TAG production.To evaluate the light regime effect on inducing TAG production,the effect of

different

light

regimes

on

nitrogen-starved

Isochrysis

zhangjiangensis was investigated in this work.The continuous light and nitrogen starvation elevated TAG content of biomass by 73％ and 193

％

,respectively.Furthermore,the

TAG

accumulation

of

I.zhangjiangensis cell under nitrogen starvation decreased under aggravated

stress

from

continuous

illumination.Our

results

demonstrated that culturing the cells with 14L:10D light regime under nitrogen starvation is the optimal mode to achieve maximal accumulation of TAG.A recovery in light regime was necessary for I.zhangfiangensis cultivation.