Physiological Changes of Parachlorella Kessleri TY02 in Lipid Accumulation under Nitrogen Stress

Yifan Gao, Jia Feng, Junping Lv, Qi Liu, Fangru Nan, Xudong Liu and Shulian Xie
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Yifan Gao: School of Life Science, Shanxi University, Taiyuan 030006, China
Jia Feng: School of Life Science, Shanxi University, Taiyuan 030006, China
Junping Lv: School of Life Science, Shanxi University, Taiyuan 030006, China
Qi Liu: School of Life Science, Shanxi University, Taiyuan 030006, China
Fangru Nan: School of Life Science, Shanxi University, Taiyuan 030006, China
Xudong Liu: School of Life Science, Shanxi University, Taiyuan 030006, China
Shulian Xie: School of Life Science, Shanxi University, Taiyuan 030006, China

IJERPH, 2019, vol. 16, issue 7, 1-17

Abstract: In order to study the effects of nitrogen stress on the lipid synthesis of Parachlorella kessleri TY02 and to understand the changes in growth, photosynthetic pigments, total protein and total carbohydrate contents during lipid accumulation, the cells of the strain were cultured in nitrogen-deficient (N − ) and nitrogen-rich (N + ) media for one week. Changes in cell growth, chlorophyll content, chlorophyll fluorescence parameters, neutral lipid and total lipid content, total protein content and total carbohydrate content were measured and analyzed. The results showed that, under nitrogen stress, the algal strain grew slowly, and chlorophyll and total protein contents decreased, while total carbohydrate and total lipid contents increased. This indicated that, under nitrogen stress, most of the carbon flowed to the synthesis of lipids and carbohydrates. Meanwhile, reducing the nitrogen content was a relatively economical and easy to operate method of promoting lipid accumulation.

Keywords: Parachlorella kessleri TY02; nitrogen stress; lipid synthesis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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