Effect of chromium on photosystem 2 in the unicellular green alga, Chlorella pyrenoidosa

Z. T. Hörcsik, L. Kovács, R. Láposi, I. Mészáros, G. Lakatos, G. Garab

Research output: Article

38 Citations (Scopus)

Abstract

We investigated the effect of chromium (20-40 g m-3, 8-72 h) on the photosystem 2 (PS2) activities of Chlorella pyrenoidosa cells. By using chlorophyll fluorescence transients, thermoluminescence, oxygen polarography, and Western blot analysis for D1 protein we found that inhibition of PS2 can be accounted for by the enhanced photodestruction of the reaction centres in the cells cultivated in the presence of Cr(VI) at 25°C in "white light" (18 W m-2). Hence photodestruction of D1 is caused by an enhanced oxidative stress and lipid peroxidation, as indicated by the appearance of a high-temperature thermoluminescence band.

Original languageEnglish
Pages (from-to)65-69
Number of pages5
JournalPhotosynthetica
Volume45
Issue number1
DOIs
Publication statusPublished - jan. 1 2007

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ASJC Scopus subject areas

  • Physiology
  • Plant Science

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