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Ken-ichiro Shimazaki, Kimiko Nakamachi, Noriaki Kondo, Kiyoshi Sugahara, Sulfite Inhibition of Photosystem II in Illuminated Spinach Leaves, Plant and Cell Physiology, Volume 25, Issue 2, March 1984, Pages 337–341, https://doi.org/10.1093/oxfordjournals.pcp.a076719
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Abstract
PS II activity (dichlorophenolindophenol photoreduction) in chloroplasts isolated from sulfite-treated spinach leaves in light was inhibited but not in darkness. Sulfite treatment decreased the variable part of fluorescence induction and the fluorescence intensities of emissions at 685 and 694 nm at 77K, but it had no effect when sulfite was administered together with DCMU. These results indicate that sulfite inactivates the PS II reaction center when electron transport takes place.