Abstract
The effect of UV-B-radiation on PSII activity of spinach chloroplasts was analyzed by measuring the integrity of the herbicide-binding protein (HBP 32), by measurement of fluorescence induction in the presence of Diuron (DCMU), and by mathematical analysis of the fluorescence induction curves. It was shown that UV-B inactivates the PSII α-centers but not PSII β-centers. However, the possibility cannot be excluded that in addition the donor site of PSII near the reaction center is attacked by UV-B-radiation.
Keywords: Photosystem II; Variable Fluorescence; Reaction Centers; Spinach Chloroplasts; UV-B-Radiation
Received: 1984-11-7
Published Online: 2014-6-2
Published in Print: 1985-2-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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