Researchers have serendipitously discovered that a key step in photosynthesis can occur much earlier in the process than previously believed.
One of the most well-studied chemical processes in nature, photosynthesis, may not work quite how we thought it did, scientists have accidentally discovered.
In the new study, published March 22 in the journal Nature , researchers used a new technique, known as ultrafast transient absorption spectroscopy, to study how photosynthesis works at a timescale of one quadrillionth of a second for the first time. The team was initially trying to figure out how quinones — ring-shaped molecules that can steal electrons during chemical processes — impact photosynthesis.
Past research had suggested that the protein scaffolding in PSI and PSII was very thick, which helped to contain electrons within them before being passed on to where they were needed. But the new ultrafast spectroscopy technique revealed that the protein scaffolding was more"leaky" than expected and that some electrons could escape from the photosystems almost immediately after light was absorbed by the chlorophyll within the photosystems.
The electron leaking was observed in both isolated photosystems and within"living" photosystems inside cyanobacteria.
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