ArticlePlant physiology2021
State transitions and photosystems spatially resolved in individual cells of the cyanobacterium Synechococcus elongatus.
Article in Plant physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Diazotrophy affects the state transitions in unicellular nitrogen fixing cyanobacteria.Photosynthesis research · 2026Article
- Electron transport reactions of cyanobacterial photosynthesis and state-of-the-art in vivo measurement techniques.Plant physiology · 2026Review
- Estimating the redox state of the plastoquinone pool in algae and cyanobacteria via OJIP fluorescence: perspectives and limitations.Photosynthesis research · 2026Article
- Cyanobacteria dynamically regulate phycobilisome-to-photosystem excitation energy transfer.iScience · 2025Article
- In vivo two-photon FLIM resolves photosynthetic properties of maize bundle sheath cells.Photosynthesis research · 2025Article
- Single chloroplast in folio imaging sheds light on photosystem energy redistribution during state transitions.Plant physiology · 2023Article
- Functional flexibility of cyanobacterial light harvesting phycobilisomes enable acclimation to the complex light regime of mixing marine water columns.The FEBS journal · 2023Article
- Microdomains heterogeneity in the thylakoid membrane proteins visualized by super-resolution microscopy.Photosynthetica · 2023Article
- Identification of multiple nonphotochemical quenching processes in the extremophilic red alga Cyanidioschyzon merolae.Photosynthesis research · 2022Article
- Phycobilisome light-harvesting efficiency in natural populations of the marine cyanobacteria Synechococcus increases with depth.Communications biology · 2022Article
- A kaleidoscope of photosynthetic antenna proteins and their emerging roles.Plant physiology · 2022Article
- Rubisco regulation in response to altered carbon status in the cyanobacterium Synechococcus elongatus PCC 7942.Plant physiology · 2022Article
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Authors and funding
4 authors.
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Abstract
State transitions are a low-light acclimation response through which the excitation of Photosystem I (PSI) and Photosystem II (PSII) is balanced; however, our understanding of this process in cyanobacteria remains poor. Here, picosecond fluorescence kinetics was recorded for the cyanobacterium Synechococcus elongatus using fluorescence lifetime imaging microscopy (FLIM), both upon chlorophyll a and phycobilisome (PBS) excitation. Fluorescence kinetics of single cells obtained using FLIM were compared with those of ensembles of cells obtained with time-resolved fluorescence spectroscopy. The global distribution of PSI and PSII and PBSs was mapped making use of their fluorescence kinetics. Both radial and lateral heterogeneity were found in the distribution of the photosystems. State transitions were studied at the level of single cells. FLIM results show that PSII quenching occurs in all cells, irrespective of their state (I or II). In S. elongatus cells, this quenching is enhanced in State II. Furthermore, the decrease of PSII fluorescence in State II was homogeneous throughout the cells, despite the inhomogeneous PSI/PSII ratio. Finally, some disconnected PBSs were resolved in most State II cells. Taken together our data show that PSI is enriched in the inner thylakoid, while state transitions occur homogeneously throughout the cell.
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