Plastocyanin/cytochrome c^sub 6^ interchange in Scenedesmus vacuolatus

Plastocyanin and cytochrome c6 from the green alga Scenedesmus vacuolatus were immunoquantified in cells grown under different concentrations of copper and iron. Plastocyanin expression was constitutive, its synthesis was not significantly affected by iron availability, and increases with copper ava...

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Bibliographic Details
Published in:Journal of plant physiology 2003-12, Vol.160 (12), p.1483
Main Authors: Miramar, M Dolores, Inda, Luis A, Saraiva, Ligia M, Peleato, M Luisa
Format: Article
Language:English
Online Access:Get full text
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Summary:Plastocyanin and cytochrome c6 from the green alga Scenedesmus vacuolatus were immunoquantified in cells grown under different concentrations of copper and iron. Plastocyanin expression was constitutive, its synthesis was not significantly affected by iron availability, and increases with copper availability. On the contrary, cytochrome c6 synthesis is repressed by copper, and only residual amounts of the protein were detected at 0.1 micromol/L copper. Under copper deficiency, cytochrome c6 is slightly dependent on iron. In natural environments, plastocyanin seems to be the predominant electron donor to P700.
ISSN:0176-1617
1618-1328