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- Publisher
- Springer Journals
- Copyright
- Copyright
- Subject
- Life Sciences; Plant Sciences; Plant Physiology; Biochemistry, general; Plant Genetics and Genomics
- ISSN
- 0166-8595
- eISSN
- 1573-5079
- DOI
- 10.1007/BF00028790
- Publisher site
- See Article on Publisher Site
Abstract
It was found that DCMU had a differential effect at two concentration ranges on variable fluorescence kinetics in isolated chloroplasts. The increase in fluorescence rate at low concentrations of DCMU was abolished by preincubation of chloroplasts with ferricyanide or formate, treatments which were shown to convert Fe in the PS II reaction center (i.e., the FeQA complex) into a non-oxidizable form, but it was not affected by Tris treatment. Increase in fluorescence kinetics (at the initial linear rate) at high concentrations of DCMU was found to be abolished by Tris treatment but it was only marginally affected by ferricyanide or formate treatments. The effect of Tris could be abolished by addition of hydroquinone-ascorbate, which restored electron flow to the pool of secondary acceptors.
Journal
Photosynthesis Research – Springer Journals
Published: Apr 19, 2004