期刊
SCIENCE
卷 360, 期 6394, 页码 1210-1213出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aar8313
关键词
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资金
- BBSRC [BB/L011506/1, BB/R001383/1]
- Leverhulme Trust [RPG-2017-223]
- Wolfson Merit Award from the Royal Society
- Australian Research Council [DP150103137]
- Imperial College Junior Research Fellowship
- FRISBI [ANR-10-INBS-05]
- BBSRC [BB/L011506/1, BB/R001383/1] Funding Source: UKRI
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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