Photosynthetica 1998, 35(3):477-480 | DOI: 10.1023/A:1006984906965

Photosystem 2 photoinactivation and repair in the Scenedesmus cells treated with herbicides DCMU and BNT and exposed to high irradiance

J. Komenda1
1 Department of Autotrophic Microorganisms, Institute of Microbiology, Academy of Sciences of the Czech Republic, Třeboň, Czech Republic

Changes in fluorescence parameters observed during irradiation of the Scenedesmus cells showed that photosystem 2 (PS2) photoinactivation in cells treated with phenolic PS2 inhibitor 2-bromo-3-methyl-6-isopropyl-4-nitrophenol (BNT) was significantly accelerated in comparison with control and DCMU-treated cells. Moreover, a negligible difference in the rate of PS2 photoinactivation in the absence and presence of chloramphenicol indicated that both DCMU and BNT blocked the PS2 repair process.

Additional key words: algae; 2-bromo-3-methyl-6-isopropyl-4-nitrophenol; chloramphenicol; chlorophyll fluorescence induction; 3-(3,4-dichlorophenyl)-1,1-dimethylurea

Prepublished online: September 1, 1998; Published: January 1, 1998  Show citation

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Komenda, J. (1998). Photosystem 2 photoinactivation and repair in the Scenedesmus cells treated with herbicides DCMU and BNT and exposed to high irradiance. Photosynthetica, 35(3), 477-480. doi: 10.1023/A:1006984906965
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