School of Biological Sciences, The University of Sydney, Sydney, NSW 2006, Australia.
Plant Cell Environ. 2013 Mar;36(3):521-7. doi: 10.1111/pce.12000. Epub 2012 Sep 20.
We discuss recent advances in chlorophyll research in the context of chlorophyll evolution and conclude that some derivations of the formyl side chain arrangement of the porphyrin ring from that of the Chl a macrocycle can extend the photosynthetic active radiation (PAR) of these molecules, for example, Chl d and Chl f absorb light in the near-infrared region, up to ∼750 nm. Derivations such as this confer a selective advantage in particular niches and may, therefore, be beneficial for photosynthetic organisms thriving in light environments with particular light signatures, such as red- and near-far-red light-enriched niches. Modelling of formyl side chain substitutions of Chl a revealed yet unidentified but theoretically possible Chls with a distinct shift of light absorption properties when compared to Chl a.
我们讨论了叶绿素研究的最新进展，从叶绿素的演变角度来看，并得出结论，卟啉环甲酰侧链排列的某些衍生形式可以扩展这些分子的光合有效辐射 (PAR)，例如，叶绿素 d 和叶绿素 f 在近红外区域吸收光，高达 ∼750nm。这种衍生形式在特定小生境中具有选择性优势，因此可能对在具有特定光特征的光照环境中茁壮成长的光合生物有益，例如富含红光和远红光的小生境。对叶绿素 a 甲酰侧链取代的建模显示，与叶绿素 a 相比，存在尚未被识别但理论上可能存在的叶绿素，其光吸收特性有明显的变化。
