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| Optimization of salt stress condition for accumulation of triglycerides in Scenedesmus bijuga FACHB-78 |
| WANG Xu1, SUN Xin1, LI Peng-fei1, WANG Jia-le1, CHENG Zhi-wen2 |
1. Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Xianyang Research & Design Institute of, Ceramics, Xianyang 712000, China |
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Abstract The growth morphology, triglyceride accumulation, photosynthetic activity and other characteristics of Scenedesmus bijuga FACHB-78 were studied under the conditions of NaCl concentration ranging from 0 to 45‰, and the optimal salt stress condition was determined. The results showed that with the increase of salinity, the density of algae cells gradually decreased, the ratio of chlorophyll a content to carotenoid content gradually increased, but the accumulation of triglyceride increased first and decreased thereafter. When the salinity was 10‰, the density of algae cells was 26.30% lower than that in normal medium, and the level and content of triglyceride both achieved the maximum values of 250.88mg/L and 33.41%, respectively, which were 97.05% and 82.09% higher than those in normal medium. Additionally, the Photosynthesis was relatively active. For the production of biodiesel, under the stress of salinity of 10‰, Scenedesmus bijuga FACHB-78 cells had greater advantages over algae cells cultured under normal medium.
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Received: 24 May 2019
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