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Nürnberg, Dennis J; Morton, Jennifer; Santabarbara, Stefano; Telfer, Alison; Joliot, Pierre; Antonaru, Laura A; Ruban, Alexander V; Cardona, Tanai; Krausz, Elmars; Boussac, Alain; Fantuzzi, Andrea; Rutherford, A William
Science (American Association for the Advancement of Science), 06/2018, Letnik: 360, Številka: 6394Journal Article
Photosystems I and II convert solar energy into the chemical energy that powers life. Chlorophyll a photochemistry, using red light (680 to 700 nm), is near universal and is considered to define the energy "red limit" of oxygenic photosynthesis. We present biophysical studies on the photosystems from a cyanobacterium grown in far-red light (750 nm). The few long-wavelength chlorophylls present are well resolved from each other and from the majority pigment, chlorophyll a. Charge separation in photosystem I and II uses chlorophyll f at 745 nm and chlorophyll f (or d) at 727 nm, respectively. Each photosystem has a few even longer-wavelength chlorophylls f that collect light and pass excitation energy uphill to the photochemically active pigments. These photosystems function beyond the red limit using far-red pigments in only a few key positions.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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