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October 1, 2002Zeitschrift für Naturforschung COpen Access

Stimulation of Oxygen Evolution in Photosystem II by Copper(II) Ions

Kvĕtoslava Burda Jerzy Kruk Kazimierz Strzałka Georg H. Schmid

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Abstract

We have found that copper(II) ions at about equimolar Cu2+/photosystem II (PS II) reaction center proportions stimulate oxygen evolution nearly twofold. This high affinity Cu-binding site is different from the binding sites of Mn and Ca ions. The analysis of the Cu2+ content in PS II preparations isolated from wild-type tobacco and a tobacco mutant deficient in light-harvesting complex suggests that Cu2+ may be a native component of PS II and may take part in the oxygen evolution process. At higher concentrations, Cu2+ ions inhibit oxygen evolution and quench fluorescence.

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Cite This Study

Burda et al. (2002) studied this question.

synapsesocial.com/papers/6ab7774992d2e6636debc6ce https://doi.org/10.1515/znc-2002-9-1016

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