Atomic Movement During Photosynthesis Photographed With X-Ra

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Atomic Movement During Photosynthesis Photographed With X-Ray Flash
ScienceDaily (May 10, 2010)

Researchers at the University of Gothenburg, Sweden, have managed, with the help of an advanced X-ray flash, to photograph the movement of atoms during photosynthesis -- an achievement reported in the journal Science.


Photograph of the photosynthetic reaction taken with an 80-microsecond X-ray pulse. (Credit: Image courtesy of University of Gothenburg)

The European Synchrotron Radiation Facility in Grenoble is home to one of the world's most advanced particle accelerators, whose pulsing X-ray beams are used by researchers to photograph and study life's tiniest components: atoms, molecules and proteins.

Using the special X-ray camera, researchers can depict the position of atoms in a molecule and obtain a three-dimensional image of something that is smaller than a billionth of a metre. Researchers at the Department of Chemistry at the University of Gothenburg and at Chalmers University of Technology have now used this advanced technology to photograph the dynamics of life's most fundamental system: photosynthesis.

The focus of the study was a protein which is central to the conversion of light to chemical energy during photosynthesis, and which process the Gothenburg researchers have been the first to successfully photograph. The X-ray image shows how the protein temporarily stores the light energy immediately before a chemical bond forms -- a movement that takes place on a scale of less than a nanometre.

The photograph is not only a fascinating snapshot of the very core of life, but could also be used in the solar panels of the future, where researchers hope to be able to imitate the sophisticated energy conversion of photosynthesis.

Journal Reference:
1. A. B. Wohri, G. Katona, L. C. Johansson, E. Fritz, E. Malmerberg, M. Andersson, J. Vincent, M. Eklund, M. Cammarata, M. Wulff, J. Davidsson, G. Groenhof, R. Neutze. Light-Induced Structural Changes in a Photosynthetic Reaction Center Caught by Laue Diffraction. Science, 2010; 328 (5978): 630 DOI: http://www.sciencemag.org/cgi/content/a ... 8/5978/630
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http://www.sciencedaily.com/releases/20 ... 202634.htm