Zhou Xin, Zeng Yue, Tang Yongyan, Huang Yiming, Lv Fengting, Liu Libing, Wang Shu
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
Sci Adv. 2020 Aug 26;6(35):eabc5237. doi: 10.1126/sciadv.abc5237. eCollection 2020 Aug.
Artificial regulation of state transition between photosystem I (PSI) and PSII will be a smart and promising way to improve efficiency of natural photosynthesis. In this work, we found that a synthetic light-harvesting polymer [poly(boron-dipyrromethene--fluorene) (PBF)] with green light absorption and far-red emission could improve PSI activity of algae , followed by further upgrading PSII activity to augment natural photosynthesis. For light-dependent reactions, PBF accelerated photosynthetic electron transfer, and the productions of oxygen, ATP and NADPH were increased by 120, 97, and 76%, respectively. For light-independent reactions, the RuBisCO activity was enhanced by 1.5-fold, while the expression levels of encoding RuBisCO and encoding phosphoribulokinase were up-regulated by 2.6 and 1.5-fold, respectively. Furthermore, PBF could be absorbed by the to speed up cell mitosis and enhance photosynthesis. By improving the efficiency of natural photosynthesis, synthetic light-harvesting polymer materials show promising potential applications for biofuel production.
人工调控光系统I（PSI）和光系统II（PSII）之间的状态转换将是提高自然光合作用效率的一种明智且有前景的方法。在这项工作中，我们发现一种具有绿光吸收和远红光发射特性的合成光捕获聚合物[聚（硼二吡咯亚甲基 - 芴）（PBF）]可以提高藻类的PSI活性，随后进一步提升PSII活性以增强自然光合作用。对于光依赖反应，PBF加速了光合电子传递，氧气、ATP和NADPH的产量分别增加了120%、97%和76%。对于光不依赖反应，核酮糖-1,5-二磷酸羧化酶（RuBisCO）活性提高了1.5倍，而编码RuBisCO和编码磷酸核酮糖激酶的基因表达水平分别上调了2.6倍和1.5倍。此外，PBF可以被细胞吸收以加速细胞有丝分裂并增强光合作用。通过提高自然光合作用效率，合成光捕获聚合物材料在生物燃料生产方面显示出有前景的潜在应用。
