ArticlePhotosynthesis research2020
Time-resolved fluorescence study of excitation energy transfer in the cyanobacterium Anabaena PCC 7120.
Article in Photosynthesis research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
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Who cites it
6 citing papers in PubMed, 14 citations in OpenAlex.
- Ultrafast energy quenching mechanism of LHCSR3-dependent photoprotection in Chlamydomonas.Nature communications · 2024Article
- A kaleidoscope of photosynthetic antenna proteins and their emerging roles.Plant physiology · 2022Article
- The antenna of far-red absorbing cyanobacteria increases both absorption and quantum efficiency of Photosystem II.Nature communications · 2022Article
- Trimeric photosystem I facilitates energy transfer from phycobilisomes in Synechocystis sp. PCC 6803.Plant physiology · 2022Article
- Time-resolved fluorescence study of excitation energy transfer in the cyanobacterium Anabaena PCC 7120.Photosynthesis research · 2020Article
- Ultrafast processes in photosynthetic light-harvesting.Photosynthesis research · 2020Article
Corrections and comments
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Authors and funding
6 authors at 4 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Excitation energy transfer (EET) and trapping in Anabaena variabilis (PCC 7120) intact cells, isolated phycobilisomes (PBS) and photosystem I (PSI) complexes have been studied by picosecond time-resolved fluorescence spectroscopy at room temperature. Global analysis of the time-resolved fluorescence kinetics revealed two lifetimes of spectral equilibration in the isolated PBS, 30-35 ps and 110-130 ps, assigned primarily to energy transfer within the rods and between the rods and the allophycocyanin core, respectively. An additional intrinsic kinetic component with a lifetime of 500-700 ps was found, representing non-radiative decay or energy transfer in the core. Isolated tetrameric PSI complexes exhibited biexponential fluorescence decay kinetics with lifetimes of about 10 ps and 40 ps, representing equilibration between the bulk antenna chlorophylls with low-energy "red" states and trapping of the equilibrated excitations, respectively. The cascade of EET in the PBS and in PSI could be resolved in intact filaments as well. Virtually all energy absorbed by the PBS was transferred to the photosystems on a timescale of 180-190 ps.
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Registered trials
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