Exogenous addition of putrescine enhanced lipid accumulation in Tetradesmus obliquus for increased biodiesel productivity

Tong Li, Jing Li, Xiajule Sheng, Bingze Li, Wei Wang, Yunzhuan Xue, Jie Zhang, Wenqi Li, Xuan Wang, Fei Wang and Jiao Xue

Renewable Energy, 2023, vol. 206, issue C, 263-273

Abstract: Microalgae can continuously convert carbon dioxide into biofuels as a typical organism of biological carbon fixation. This study investigated the effects of exogenous putrescine on lipid accumulation, algal growth, and transcriptional metabolism of Tetradesmus obliquus. The results showed that the content of neutral lipids increased by 2.26-fold after short-term stress of putrescine, and the total lipids increased to 355.51 mg/g. Furthermore, the transcriptomic analysis reveals that putrescine treatment plays a dramatic role in photosynthetic electron transport, carbon metabolism, and signal transduction pathways, and the purpose of lipid accumulation was achieved by influencing the changes in cell carbon flux and physiological functions. Altogether, this study demonstrates for the first time that putrescine treatment has a positive effect on lipid accumulation through unprecedented regulation of key metabolic nodes and provides theoretical support for the industrial biodiesel production of microalgae.

Keywords: Tetradesmus obliquus; Putrescine; Chemical modulator; Carbon flux; Lipid productivity (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:206:y:2023:i:c:p:263-273

DOI: 10.1016/j.renene.2023.02.037

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