Photoinactivation of photosystem II at low light intensity. Matematical models

András Szilárd, László Sass, Imre Vass

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6 Citations (Scopus)


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
Issue number3-4
Publication statusPublished - Jan 1 2002



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

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

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