The combined effects of UV-C radiation and H2O2 on Microcystis aeruginosa, a bloom-forming cyanobacterium

•Responses of photosynthetic activities to UVC and H2O2 were investigated.•Changing of ultrastructure was screened under UVC and H2O2 treatments.•Aggregation of the D1 protein was caused by H2O2.•H2O2 had a stronger damage on PSI than UVC.•Synergetic effects of UVC and H2O2 on membrane systems and p...

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Veröffentlicht in:	Chemosphere (Oxford) 2015-12, Vol.141, p.34-43
Hauptverfasser:	Wang, Binliang, Wang, Xi, Hu, Yiwei, Chang, Mingxian, Bi, Yonghong, Hu, Zhengyu
Format:	Artikel
Sprache:	eng
Schlagworte:	Agglomeration Cyanobacteria Cyanobacterial bloom Damage Degradation Eutrophication - drug effects Eutrophication - radiation effects H2O2 Hydrogen Peroxide - chemistry Malondialdehyde - metabolism Membranes Microcystins - metabolism Microcystis Microcystis - drug effects Microcystis - radiation effects Microcystis - ultrastructure Microcystis aeruginosa Oxidation-Reduction Photosystem Photosystem II Protein Complex - metabolism Proteins Reactive Oxygen Species - metabolism Sole Thylakoids - drug effects Thylakoids - metabolism Toxicity Ultraviolet Rays UVC
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Zusammenfassung:	•Responses of photosynthetic activities to UVC and H2O2 were investigated.•Changing of ultrastructure was screened under UVC and H2O2 treatments.•Aggregation of the D1 protein was caused by H2O2.•H2O2 had a stronger damage on PSI than UVC.•Synergetic effects of UVC and H2O2 on membrane systems and photosystems were studied. In order to get insight into the impacts of UVC/H2O2 on Microcystis aeruginosa, physiological and morphological changes as well as toxicity were detected under different UVC/H2O2 treatments. In the presence of sole UVC or H2O2, the net oxygen evolution rate decreased significantly (p
ISSN:	0045-6535 1879-1298
DOI:	10.1016/j.chemosphere.2015.06.020