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High-light induced superoxide radical formation in cytochrome b6f complex from Bryopsis corticulans as detected by EPR spectroscopy

Paper ID Volume ID Publish Year Pages File Format Full-Text
30886 44512 2011 5 PDF Available
Title
High-light induced superoxide radical formation in cytochrome b6f complex from Bryopsis corticulans as detected by EPR spectroscopy
Abstract

The generation of superoxide radical (O2-) in Cyt b6f of Bryopsis corticulans   under high light illumination was studied using electron paramagnetic resonance (EPR) spectroscopy. This could be evidenced by the addition of SOD which specifically reacted with O2-. The generation of O2- was lost in the absence of oxygen and was found to be suppressed in the presence of NaN3 and be scavenged by extraneous antioxidants such as ascorbate, β  -carotene and glutathione which could also scavenged 1O2∗. These results indicated that O2- which produced under high light illumination in Cyt b6f of B. corticulans   might rise from a reaction which 1O2∗ could participated in. Also the photo-protection mechanism to Cyt b6f complex by antioxidants which might contain in thylakoid was speculated.

Keywords
Cyt b6f; EPR; Superoxide radical; Photoprotection
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High-light induced superoxide radical formation in cytochrome b6f complex from Bryopsis corticulans as detected by EPR spectroscopy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 102, Issue 3, 2 March 2011, Pages 177–181
Authors
, , , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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