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. 1970 Jul;46(1):163–168. doi: 10.1104/pp.46.1.163

Energy and Electron Transfer Systems of Chlamydomonas reinhardi

II. Two Cyclic Pathways of Photosynthetic Electron Transfer in the Pale Green Mutant 1

Tetsuo Hiyama a,2, Mitsuo Nishimura a,3, Britton Chance a
PMCID: PMC396552  PMID: 16657410

Abstract

Light- and oxygen-induced changes of cytochromes f, b563, and b559 and ferredoxin-flavoprotein were studied by a double beam spectrophotometer with combinations of inhibitors and lowered temperatures in the whole cells of the pale green mutant of Chlamydomonas reinhardi (ATCC 18302). At room temperature, the steady state changes of cytochrome f and ferredoxin-flavoprotein are small, but at low temperature slightly above 0 C, they are clearly defined. Phenylmercuric acetate inhibits photoreduction of ferredoxin-flavoprotein and cytochrome f simultaneously but not that of cytochrome b563. 2-Heptyl-4-hydroxyquinoline-N-oxide shows a crossover point between cytochromes f and b563 and partially inhibits photoreduction of cytochrome f. Two cyclic pathways operating in C. remhardi are postulated: (a) photosystem I → x → b563 → f → photosystem I; and (b) photosystem I → x → ferredoxin-flavoprotein → f → photosystem I.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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