ArticlePhotosynthesis research2005
How fast can photosystem II split water? Kinetic performance at high and low frequencies.
Article in Photosynthesis research, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.
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Who cites it
42 citing papers in PubMed.
- Pathway(s) and distribution of photosystem II-cyclic electron flow.Biochemical Society transactions · 2026Review
- Unique properties of light-induced changes of variable chlorophyll fluorescence in purified PSII core complexes of Thermosynechococcus vestitus.Photosynthesis research · 2026Article
- Interrelated Roles of Chloride and Bicarbonate in Regulating Electron Transport Across Photosystem II inPlants (Basel, Switzerland) · 2026Article
- Chloride dependence of photosystem II operation in the hypercarbonate-requiring cyanobacterium Limnospira maxima.Photosynthesis research · 2026Article
- Tuning Shinkarev's Bicycle: Separating the Parallel Cycles of Photosystem II Using Empirical Wavelet Transform.Plants (Basel, Switzerland) · 2026Article
- Distinctions in photochemistry betweenFrontiers in plant science · 2026Article
- Adaptation of plant photosynthetic metabolism to extreme COFrontiers in plant science · 2026Article
- Revisiting the QPhotosynthesis research · 2025Review
- Continuous Light-Induced Water Oxidation in Polyoxometalate-Based Photocatalytic Protocells and Prototissues.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025Article
- Depletion reveals role of bicarbonate in the photosynthetic electron transport chain ofFrontiers in plant science · 2025Article
- Exceptional Quantum Efficiency Powers Biomass Production in Halotolerant Algae Picochlorum sp.Photosynthesis research · 2024Article
- Flash-kinetics as a complementary analytical tool in PAM fluorimetry.Photosynthesis research · 2024Article
- High-intensity pulsed-light cultivation of unicellular algae: Photosynthesis continues in the dark.Heliyon · 2024Article
- Artificial Photosynthesis: Current Advancements and Future Prospects.Biomimetics (Basel, Switzerland) · 2023Review
- Solar energy conversion by photosystem II: principles and structures.Photosynthesis research · 2023Review
- Cyanobacterial photosystem II reaction center design in tobacco chloroplasts increases biomass in low light.Plant physiology · 2023Article
- Cyclic electron flow around photosystem II in silico: How it works and functions in vivo.Photosynthesis research · 2023Article
- Regulation of light energy conversion between linear and cyclic electron flow within photosystem II controlled by the plastoquinone/quinol redox poise.Photosynthesis research · 2023Article
- Molecular basis for turnover inefficiencies (misses) during water oxidation in photosystem II.Chemical science · 2022Article
- Bridging the gap between Kok-type and kinetic models of photosynthetic electron transport within Photosystem II.Photosynthesis research · 2022Article
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2 authors.
Funding
Abstract
Molecular oxygen evolution from water is a universal signature of oxygenic photosynthesis. Detection of the presence, speed and efficiency of the enzymatic machinery that catalyzes this process in vivo has been limited. We describe a laser-based fast repetition rate fluorometer (FRRF) that allows highly accurate and rapid measurements of these properties via the kinetics of Chl-a variable fluorescence yield (Fv) in living cells and leaves at repetition rates up to 10 kHz. Application to the detection of quenching of Fv is described and compared to flash-induced O2 yield data. Period-four oscillations in both Fv and O2, caused by stimulation of primary charge recombination by the O2 evolving complex (WOC) within Photosystem II (PS II), are directly compared. The first quantitative calculations of the enzymatic parameters of the Kok model (alpha - miss; beta - double hit; S-state populations) are reported from Fv data over a 5 kHz range of flash frequencies that is 100-fold wider than previously examined. Comparison of a few examples of cyanobacteria, green algae and spinach reveals that Arthrospira m., a cyanobacterium that thrives in alkaline carbonate lakes, exhibits the fastest water-splitting rates ever observed thus farin vivo. In all oxygenic phototrophs examined thus far, an unprecedented large increase in the Kok alpha and beta parameters occur at both high and low flash frequencies, which together with their strong correlation, indicates that PS II-WOC centers split water at remarkably lower efficiencies and possibly by different mechanisms at these extreme flash frequencies. Revisions to the classic Kok model are anticipated.
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