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<p>The development of synthetic hybrid biological systems integrating photosynthetic organisms with organic-abiotic functional materials holds significant promise for enhancing photosynthetic processes. The artificial regulation of the state transition between photosystem I (PSI) and photosystem II (PSII) represents a strategic and promising approach for improving the efficiency of natural photosynthesis. In this study, we demonstrate that poly(benzimidazolium-phenylthiophene) (CP4) featuring a flexible cationic backbone exhibits superior ultraviolet light-harvesting capability. The polymer CP4 enhanced PSI activity in <i>Chlorella pyrenoidosa (C. pyrenoidosa)</i>, subsequently promoting PSII activity and augmenting overall photosynthetic performance. During light-dependent reactions, CP4 significantly accelerated photosynthetic electron transfer, resulting in a 330% increase in the production of oxygen and 93% and 96% increases in the ATP and NADPH contents, respectively. In the context of dark reactions, CP4 facilitated the conversion and utilization of light energy, leading to a 6% increase in both carbohydrate and protein contents. These findings indicate that synthetic light-harvesting polymer materials exhibit considerable application potential in the field of biomass production through enhancement of natural photosynthetic efficiency.</p>

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Poly(benzimidazolium-phenylthiophene) Featuring Flexible Cationic Backbone Enhanced Photosynthesis of Chlorella pyrenoidosa

  • 期刊论文

  • 发表日期：

    2026年3月3日

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  • Xiao-Long Xu,
  • Jian-Tao Lin,
  • Sheng-Peng Xia,
  • Yan Zhao,
  • Hao-Tian Bai,
  • Yi-Ming Huang

摘要

The development of synthetic hybrid biological systems integrating photosynthetic organisms with organic-abiotic functional materials holds significant promise for enhancing photosynthetic processes. The artificial regulation of the state transition between photosystem I (PSI) and photosystem II (PSII) represents a strategic and promising approach for improving the efficiency of natural photosynthesis. In this study, we demonstrate that poly(benzimidazolium-phenylthiophene) (CP4) featuring a flexible cationic backbone exhibits superior ultraviolet light-harvesting capability. The polymer CP4 enhanced PSI activity in Chlorella pyrenoidosa (C. pyrenoidosa), subsequently promoting PSII activity and augmenting overall photosynthetic performance. During light-dependent reactions, CP4 significantly accelerated photosynthetic electron transfer, resulting in a 330% increase in the production of oxygen and 93% and 96% increases in the ATP and NADPH contents, respectively. In the context of dark reactions, CP4 facilitated the conversion and utilization of light energy, leading to a 6% increase in both carbohydrate and protein contents. These findings indicate that synthetic light-harvesting polymer materials exhibit considerable application potential in the field of biomass production through enhancement of natural photosynthetic efficiency.