Photoinactivation of photosystem II at low light intensity. Matematical models

András Szilárd, L. Sass, I. Vass

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We studied the effect of low light intensity on Photosystem II (PSII) of thylakoid membranes isolated form spinach. The application of low frequency single turnover flashes results in the decreased oxygen evolving activity of PSII. This effect was explained in the framework of a model, which assumes that saturating visible light flashes at low frequency can result in the degradation of the D1 protein, since S2,3/QB and S2/QA recombinations generate singlet oxygen through the intermediate triplet chlorophyll formation. We propose a pathway for the light-induced transitions and dark period processes of the S-states, which results the best fit of our experimental data.

Original languageEnglish
Pages (from-to)167-169
Number of pages3
JournalActa Biologica Szegediensis
Volume46
Issue number3-4
Publication statusPublished - 2002

Fingerprint

Photosystem II Protein Complex
photosystem II
light intensity
Light
D1 protein
singlet oxygen
scotophase
spinach
thylakoids
Singlet Oxygen
Thylakoids
Spinacia oleracea
Chlorophyll
S Phase
chlorophyll
oxygen
Genetic Recombination
Proteolysis
degradation
Oxygen

Keywords

  • Acceptor-side photoinactivation
  • Low light effect
  • Photosystem II
  • S-states

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Cell Biology
  • Applied Microbiology and Biotechnology
  • Neuroscience(all)

Cite this

Photoinactivation of photosystem II at low light intensity. Matematical models. / Szilárd, András; Sass, L.; Vass, I.

In: Acta Biologica Szegediensis, Vol. 46, No. 3-4, 2002, p. 167-169.

Research output: Contribution to journalArticle

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