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<p>Improving photosynthetic efficiency is pivotal for biomanufacturing and agriculture. Despite the progress on photosynthetic biohybrids integrating biocatalysts with materials, nanomaterials with increasing energy-efficiency as well as great biocompatibility and cost-effectiveness are needed. Here, we present a closed-loop strategy using biomass-derived carbon dots (CDs) for improving photosynthesis. We demonstrate that the CDs act as both light converters and photosensitizers by converting solar irradiation to red light and supplying light-excited electrons into the photosynthetic electron transfer chain. Biohybrids incorporating CDs and cyanobacteria or plant exhibited increased photosynthetic efficiency, when compared with the photosynthetic organism only. The cyanobacterial CO<sub>2</sub>-fixation rate and CO<sub>2</sub>-to-glycerol production were increased 2.4-fold and 2.2-fold, respectively, while <i>Arabidopsis thaliana</i> displayed a 1.8-fold increase in the fresh weight of the plant. Techno-economic analysis showed the competitive advantage of biomass-derived CDs over other nanomaterials. These CDs hold potential applications in future sustainable agriculture and solar-powered biomanufacturing.</p><p></p>

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Closed-loop enhancement of plant photosynthesis via biomass-derived carbon dots in biohybrids

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月2日

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  • Wenbo Cheng,
  • Xueyun Wang,
  • Haitao Hu,
  • Yu Yang,
  • Xuemeng Yu,
  • Wei Xiang Chao,
  • Min Yu,
  • Jianwei Ding,
  • Yiliang Lin,
  • Wei Zhao,
  • Qiao Zhao,
  • Rodrigo Ledesma-Amaro,
  • Chao Zhong,
  • Lu Lu,
  • Xihan Chen,
  • Junzhong Liu,
  • Chen Yang,
  • Xiang Gao

摘要

Improving photosynthetic efficiency is pivotal for biomanufacturing and agriculture. Despite the progress on photosynthetic biohybrids integrating biocatalysts with materials, nanomaterials with increasing energy-efficiency as well as great biocompatibility and cost-effectiveness are needed. Here, we present a closed-loop strategy using biomass-derived carbon dots (CDs) for improving photosynthesis. We demonstrate that the CDs act as both light converters and photosensitizers by converting solar irradiation to red light and supplying light-excited electrons into the photosynthetic electron transfer chain. Biohybrids incorporating CDs and cyanobacteria or plant exhibited increased photosynthetic efficiency, when compared with the photosynthetic organism only. The cyanobacterial CO2-fixation rate and CO2-to-glycerol production were increased 2.4-fold and 2.2-fold, respectively, while Arabidopsis thaliana displayed a 1.8-fold increase in the fresh weight of the plant. Techno-economic analysis showed the competitive advantage of biomass-derived CDs over other nanomaterials. These CDs hold potential applications in future sustainable agriculture and solar-powered biomanufacturing.