Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa
Effects of potassium permanganate (KMnO4) on PSII of Mycrocystis aeruginosa were investigated by measuring the chlorophyll fluorescence in vivo. KMnO4 exposure reduced the rate of oxygen evolution and cell growth. High concentration of KMnO4 (10 mg L-1) decreased the fast phase and increased the slo...
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Academy of Sciences of the Czech Republic, Institute of Experimental Botany
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doaj-a668454c69af4320b212969deb4b642f2020-11-25T03:10:38ZengAcademy of Sciences of the Czech Republic, Institute of Experimental BotanyPhotosynthetica0300-36041573-90582020-03-01581546010.32615/ps.2019.155phs-202001-0007Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosaL. LI0X.L. PAN1G.J. MU2State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaCele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele 848300, ChinaEffects of potassium permanganate (KMnO4) on PSII of Mycrocystis aeruginosa were investigated by measuring the chlorophyll fluorescence in vivo. KMnO4 exposure reduced the rate of oxygen evolution and cell growth. High concentration of KMnO4 (10 mg L-1) decreased the fast phase and increased the slow phase of QA- reoxidation kinetics. Electron transport after QA was blocked, resulting in a considerable amount of QA- reoxidation being performed via S2(QAQB)- charge recombination. KMnO4 decreased the density of the active photosynthetic reaction centers and the maximum quantum yield for primary photochemistry and inhibited electron transport, which resulted in a decline of the performance of PSII activity and caused an increase in dissipated energy flux per reaction center and antenna size. Our results suggest that both the donor side and the acceptor on the phase of QA- to QB to PQ of PSII in M. aeruginosa were targets of KMnO4 toxicity.https://ps.ueb.cas.cz/artkey/phs-202001-0007_toxic-effects-of-potassium-permanganate-on-photosystem-ii-activity-of-cyanobacteria-microcystis-aeruginosa.phpfluorescence relaxation kineticsinactive reaction centers-state test |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L. LI X.L. PAN G.J. MU |
spellingShingle |
L. LI X.L. PAN G.J. MU Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa Photosynthetica fluorescence relaxation kinetics inactive reaction center s-state test |
author_facet |
L. LI X.L. PAN G.J. MU |
author_sort |
L. LI |
title |
Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa |
title_short |
Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa |
title_full |
Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa |
title_fullStr |
Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa |
title_full_unstemmed |
Toxic effects of potassium permanganate on photosystem II activity of cyanobacteria Microcystis aeruginosa |
title_sort |
toxic effects of potassium permanganate on photosystem ii activity of cyanobacteria microcystis aeruginosa |
publisher |
Academy of Sciences of the Czech Republic, Institute of Experimental Botany |
series |
Photosynthetica |
issn |
0300-3604 1573-9058 |
publishDate |
2020-03-01 |
description |
Effects of potassium permanganate (KMnO4) on PSII of Mycrocystis aeruginosa were investigated by measuring the chlorophyll fluorescence in vivo. KMnO4 exposure reduced the rate of oxygen evolution and cell growth. High concentration of KMnO4 (10 mg L-1) decreased the fast phase and increased the slow phase of QA- reoxidation kinetics. Electron transport after QA was blocked, resulting in a considerable amount of QA- reoxidation being performed via S2(QAQB)- charge recombination. KMnO4 decreased the density of the active photosynthetic reaction centers and the maximum quantum yield for primary photochemistry and inhibited electron transport, which resulted in a decline of the performance of PSII activity and caused an increase in dissipated energy flux per reaction center and antenna size. Our results suggest that both the donor side and the acceptor on the phase of QA- to QB to PQ of PSII in M. aeruginosa were targets of KMnO4 toxicity. |
topic |
fluorescence relaxation kinetics inactive reaction center s-state test |
url |
https://ps.ueb.cas.cz/artkey/phs-202001-0007_toxic-effects-of-potassium-permanganate-on-photosystem-ii-activity-of-cyanobacteria-microcystis-aeruginosa.php |
work_keys_str_mv |
AT lli toxiceffectsofpotassiumpermanganateonphotosystemiiactivityofcyanobacteriamicrocystisaeruginosa AT xlpan toxiceffectsofpotassiumpermanganateonphotosystemiiactivityofcyanobacteriamicrocystisaeruginosa AT gjmu toxiceffectsofpotassiumpermanganateonphotosystemiiactivityofcyanobacteriamicrocystisaeruginosa |
_version_ |
1724658310055985152 |