Researchers identify photosynthetic dimmer switch

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View from above of the Photosystem II (PSII) supercomplex of light-harvesting proteins. Energy-quenching takes place in the D1 and D2 proteins (light blue and dark blue areas respectively) which are surrounded by the CP29 CP26 and CP24 proteins. Expe ...
View from above of the Photosystem II (PSII) supercomplex of light-harvesting proteins. Energy-quenching takes place in the D1 and D2 proteins (light blue and dark blue areas respectively), which are surrounded by the CP29, CP26 and CP24 proteins. Experimental results indicate that CP29, CP26 and CP24 serve as valves controlling the flow of solar energy through the energy-quencing areas. Credit: Roberto Rossi, University of Verona, Italy

In a study of the molecular mechanisms by which plants protect themselves from oxidation damage should they absorb too much sunlight during photosynthesis, a team of researchers has discovered a molecular “dimmer switch” that helps control the flow of solar energy moving through the system of light harvesting proteins. This discovery holds important implications for the future design of artificial photosynthesis systems that could provide the world with a sustainable and secure source of energy.


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