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

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

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.

Suggested Citation

  • Li, Tong & Li, Jing & Sheng, Xiajule & Li, Bingze & Wang, Wei & Xue, Yunzhuan & Zhang, Jie & Li, Wenqi & Wang, Xuan & Wang, Fei & Xue, Jiao, 2023. "Exogenous addition of putrescine enhanced lipid accumulation in Tetradesmus obliquus for increased biodiesel productivity," Renewable Energy, Elsevier, vol. 206(C), pages 263-273.
    • Handle: RePEc:eee:renene:v:206:y:2023:i:c:p:263-273
    DOI: 10.1016/j.renene.2023.02.037
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    References listed on IDEAS

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    1. Nora Expósito & Roberta Carafa & Vikas Kumar & Jordi Sierra & Marta Schuhmacher & Gemma Giménez Papiol, 2021. "Performance of Chlorella Vulgaris Exposed to Heavy Metal Mixtures: Linking Measured Endpoints and Mechanisms," IJERPH, MDPI, vol. 18(3), pages 1-19, January.
    2. SundarRajan, PanneerSelvam & Gopinath, Kannappan Panchamoorthy & Arun, Jayaseelan & GracePavithra, Kirubanandam & Pavendan, Kumar & AdithyaJoseph, Antonysamy, 2020. "An insight into carbon balance of product streams from hydrothermal liquefaction of Scenedesmus abundans biomass," Renewable Energy, Elsevier, vol. 151(C), pages 79-87.
    3. Kleiman, Rachel M. & Characklis, Gregory W. & Kern, Jordan D., 2022. "Managing weather- and market price-related financial risks in algal biofuel production," Renewable Energy, Elsevier, vol. 200(C), pages 111-124.
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