Evidence map›Paper›PMID 23456268›Full record

ReviewPhotosynthesis research2014

Chlorophyll a fluorescence: beyond the limits of the Q(A) model.

Gert Schansker, Szilvia Z Tóth, Alfred R Holzwarth, Győző Garab

Abstract readReview
PubMed Publisher
In one paragraph

Review in Photosynthesis research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed
6.0field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

69 citing papers in PubMed, 172 citations in OpenAlex.

  1. Article
  2. Article
  3. Changes in ChlorophyllPlants (Basel, Switzerland) · 2025
    Article
  4. Revisiting the QPhotosynthesis research · 2025
    Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Photosystem II Performance ofPlants (Basel, Switzerland) · 2023
    Article
  12. Article
  13. Editorial.Photosynthetica · 2023
    Article
  14. DORN1 Is Involved in Drought Stress Tolerance through a CaInternational journal of molecular sciences · 2022
    Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article

9 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 2 countries.

Gert SchanskerInstitute of Plant Biology, Biological Research Center Szeged, Hungarian Academy of Sciences, Szeged, 6701, Hungary, gert.schansker@gmail.com.
Szilvia Z Tóth
Alfred R Holzwarth
Győző Garab
Hungarian Academy of Sciences · HUHUN-REN Szegedi Biológiai Kutatóközpont · HUMax Planck Institute for Chemical Energy Conversion · DE

Funding

PHS HHS TÉT-10-1-2011-0279
6 · The paper itself

Abstract

Chlorophyll a fluorescence is a non-invasive tool widely used in photosynthesis research. According to the dominant interpretation, based on the model proposed by Duysens and Sweers (1963, Special Issue of Plant and Cell Physiology, pp 353-372), the fluorescence changes reflect primarily changes in the redox state of Q(A), the primary quinone electron acceptor of photosystem II (PSII). While it is clearly successful in monitoring the photochemical activity of PSII, a number of important observations cannot be explained within the framework of this simple model. Alternative interpretations have been proposed but were not supported satisfactorily by experimental data. In this review we concentrate on the processes determining the fluorescence rise on a dark-to-light transition and critically analyze the experimental data and the existing models. Recent experiments have provided additional evidence for the involvement of a second process influencing the fluorescence rise once Q(A) is reduced. These observations are best explained by a light-induced conformational change, the focal point of our review. We also want to emphasize that-based on the presently available experimental findings-conclusions on α/ß-centers, PSII connectivity, and the assignment of FV/FM to the maximum PSII quantum yield may require critical re-evaluations. At the same time, it has to be emphasized that for a deeper understanding of the underlying physical mechanism(s) systematic studies on light-induced changes in the structure and reaction kinetics of the PSII reaction center are required.

Indexed as

FluorescenceChlorophyllChlorophyll ALightModels, BiologicalPhotosynthesisPhotosystem II Protein ComplexChlorophyllChlorophyll APhotosystem II Protein Complex

Identifiers

PMID23456268
OpenAlexW2060671667

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.