The deep red state of photosystem II in Cyanidioschyzon merolae

J. Langley, J. Morton, R. Purchase, L. Tian, L. Shen, G. Han, Jian-Ren Shen, E. Krausz

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We identified and characterised the deep red state (DRS), an optically-absorbing charge transfer state of PSII, which lies at lower energy than P680, in the red algae Cyanidioschyzon merolae by means of low temperature absorption and magnetic circular dichroism spectroscopies. The photoactive DRS has been previously studied in PSII of the higher plant Spinacia oleracea, and in the cyanobacterium Thermosynechococcus vulcanus. We found the DRS in PSII of C. merolae has similar spectral properties. Treatment of PSII with dithionite leads to reduction of cytochrome (cyt) b559 and the PsbV-based cyt c550 as well as the disassembly of the oxygen-evolving complex. Whereas the overall visible absorption spectrum of PSII was little affected, the DRS absorption in the reduced sample was no longer seen. This bleaching of the DRS is discussed in terms of a corresponding lack of a DRS feature in D1D2/cyt b559 reaction centre preparations of PSII.

Original languageEnglish
Pages (from-to)275-278
Number of pages4
JournalPhotosynthetica
Volume56
Issue number1
DOIs
Publication statusPublished - Mar 1 2018

Fingerprint

Photosystem II Protein Complex
cytochromes
photosystem II
Thermosynechococcus vulcanus
circular dichroism spectroscopy
oxygen evolving complex
Dithionite
Rhodophyta
Spinacia oleracea
Cyanobacteria
Circular Dichroism
bleaching
Spectrum Analysis
Oxygen
Temperature
energy
temperature
sampling
cytochrome b559

Keywords

  • optical spectra
  • photosynthesis

ASJC Scopus subject areas

  • Physiology
  • Plant Science

Cite this

Langley, J., Morton, J., Purchase, R., Tian, L., Shen, L., Han, G., ... Krausz, E. (2018). The deep red state of photosystem II in Cyanidioschyzon merolae. Photosynthetica, 56(1), 275-278. https://doi.org/10.1007/s11099-017-0760-x

The deep red state of photosystem II in Cyanidioschyzon merolae. / Langley, J.; Morton, J.; Purchase, R.; Tian, L.; Shen, L.; Han, G.; Shen, Jian-Ren; Krausz, E.

In: Photosynthetica, Vol. 56, No. 1, 01.03.2018, p. 275-278.

Research output: Contribution to journalArticle

Langley, J, Morton, J, Purchase, R, Tian, L, Shen, L, Han, G, Shen, J-R & Krausz, E 2018, 'The deep red state of photosystem II in Cyanidioschyzon merolae', Photosynthetica, vol. 56, no. 1, pp. 275-278. https://doi.org/10.1007/s11099-017-0760-x
Langley J, Morton J, Purchase R, Tian L, Shen L, Han G et al. The deep red state of photosystem II in Cyanidioschyzon merolae. Photosynthetica. 2018 Mar 1;56(1):275-278. https://doi.org/10.1007/s11099-017-0760-x
Langley, J. ; Morton, J. ; Purchase, R. ; Tian, L. ; Shen, L. ; Han, G. ; Shen, Jian-Ren ; Krausz, E. / The deep red state of photosystem II in Cyanidioschyzon merolae. In: Photosynthetica. 2018 ; Vol. 56, No. 1. pp. 275-278.
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