PMID: 109120May 9, 1979

Sulfide inhibition of photosystem II in cyanobacteria (blue-green algae) and tobacco chloroplasts

Biochimica Et Biophysica Acta
A OrenS Malkin

Abstract

The present study shows that in the presence of 600 nm light, sulfide acts as a specific inhibitor of photosynthetic electron transport between water and Photosystem II in the cyanobacteria Aphanothece halophytica and Synechococcus 6311 as well as in tobacco chloroplasts. In the presence of 600 nm light sulfied affects the fast fluorescence transients as does a low concentration (10 mM) of hydroxylamine; the fluorescence yield decreases in the presence of either chemical and can be restored by the addition of 3-(3,4-dichlorophenyl)-1,1-dimethylurea. In chloroplasts, however, NH2OH, an electron donor at high concentrations (40 mM), relieves the sulfide effect. In the dark, sulfide affects the cyanobacterial fluorescence transients through decrease of oxygen tension. The fluorescence yield increases in a similar pattern to that observed under nitrogen flushing. Upon omission of sulfide in A. halophytica, the characteristic aerobic fluorescence transients return, consistent with the ease of alternation between oxygenic and sulfide-dependent anoxygenic photosynthesis in many cyanobacteria.

References

Mar 3, 1970·Biochimica Et Biophysica Acta·G M Cheniae, I F Martin
May 20, 1960·Biochimica Et Biophysica Acta·M Avron
May 1, 1977·Proceedings of the National Academy of Sciences of the United States of America·A OrenM Avron

Citations

Oct 7, 2009·Proceedings of the National Academy of Sciences of the United States of America·D T JohnstonA H Knoll
Sep 11, 2007·Applied and Environmental Microbiology·Seth D'ImperioT R McDermott
Feb 10, 2004·Applied and Environmental Microbiology·Scott R Miller, Brad M Bebout
Aug 13, 2014·Water Research·Giorgos MarkouKoenraad Muylaert
Dec 4, 2008·FEMS Microbiology Ecology·Jamie L Myers, Laurie L Richardson
Sep 28, 1984·Biochemical and Biophysical Research Communications·I FryL Packer
Jan 1, 1993·Critical Reviews in Microbiology·G S Bullerjahn, A F Post
Apr 20, 2011·FEMS Microbiology Ecology·Emily P BalskusChristopher T Walsh

Related Concepts

Aerobiosis
Cyanobacteria
Chlorophyll
Etioplasts
Darkness
Diuron
Dark Reactions of Photosynthesis
Plants, Toxic
Fluorescence Spectroscopy
Thioethers

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