The Photosynthetic Electron Transport Chain of Chlamydomonas reinhardi. VII. Photosynthetic Phosphorylation by a Mutant Strain of Chlamydomonas reinhardi Deficient in Active P700 | Zendy

Alice L. Givan | Zendy; R. P. Levine | Zendy

Open Access

The Photosynthetic Electron Transport Chain of Chlamydomonas reinhardi. VII. Photosynthetic Phosphorylation by a Mutant Strain of Chlamydomonas reinhardi Deficient in Active P700

Author(s) -

Alice L. Givan,

R. P. Levine

Publication year - 1967

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.42.9.1264

Subject(s) - chlamydomonas , electron transport chain , p700 , photosynthesis , ferricyanide , photosynthetic reaction centre , mutant , electron acceptor , photosystem , photophosphorylation , strain (injury) , photosystem i , chemistry , biology , biochemistry , biophysics , photochemistry , chloroplast , photosystem ii , anatomy , gene

Electron transport activity and absorbance changes associated with P700 were investigated in a mutant strain of Chlamydomonas reinhardi with impaired photosynthesis. This mutant strain, ac-8oa, cannot reduce NADP with electrons from either water or dye and ascorbate, but it has considerable Hill activity. The mutant strain shows none of the absorbance changes characteristic of P700. Although unable to carry out cyclic photosynthetic phosphorylation, ac-8oa is able to synthesize ATP when ferricyanide is provided as an electron acceptor. These observations lead to the conclusion that a site for the coupling of photosynthetic phosphorylation with electron transport must exist between the 2 photochemical systems.

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