ArticlePhotosynthesis research2020
Modelling excitation energy transfer and trapping in the filamentous cyanobacterium Anabaena variabilis 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 5 papers.
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Who cites it
5 citing papers in PubMed, 6 citations in OpenAlex.
- Phycobilisome core architecture influences photoprotective quenching by the Orange Carotenoid Protein.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Cyanobacteria dynamically regulate phycobilisome-to-photosystem excitation energy transfer.iScience · 2025Article
- Energy transfer from phycobilisomes to photosystem I at room temperature.Frontiers in plant science · 2023Article
- A kaleidoscope of photosynthetic antenna proteins and their emerging roles.Plant physiology · 2022Article
- Ultrafast processes in photosynthetic light-harvesting.Photosynthesis research · 2020Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The phycobilisome (PBS) serves as the major light-harvesting system, funnelling excitation energy to both photosystems (PS) in cyanobacteria and red algae. The picosecond kinetics involving the excitation energy transfer has been studied within the isolated systems and intact filaments of the cyanobacterium Anabaena variabilis PCC 7120. A target model is proposed which resolves the dynamics of the different chromophore groups. The energy transfer rate of 8.5 ± 1.0/ns from the rod to the core is the rate-limiting step, both in vivo and in vitro. The PBS-PSI-PSII supercomplex reveals efficient excitation energy migration from the low-energy allophycocyanin, which is the terminal emitter, in the PBS core to the chlorophyll a in the photosystems. The terminal emitter of the phycobilisome transfers energy to both PSI and PSII with a rate of 50 ± 10/ns, equally distributing the solar energy to both photosystems. Finally, the excitation energy is trapped by charge separation in the photosystems with trapping rates estimated to be 56 ± 6/ns in PSI and 14 ± 2/ns in PSII.
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