Light Dependent Reduction of Pertechnetate (99TcO4−) by Broken Chloroplasts | Zendy

Johan F. Lembrechts | Zendy; G. Desmet | Zendy

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Light Dependent Reduction of Pertechnetate (⁹⁹TcO₄⁻) by Broken Chloroplasts

Author(s) -

Johan F. Lembrechts,

G. Desmet

Publication year - 1986

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.81.4.1003

Subject(s) - ferredoxin , chloroplast , electron acceptor , acceptor , photochemistry , chemistry , photosynthesis , redox , physics , inorganic chemistry , enzyme , biochemistry , gene , condensed matter physics

Arguments are given for a ferredoxin-mediated reduction of TcO(4) (-), preponderantly into extractable Tc(V) complexes, by illuminated, broken chloroplasts. Photosynthetic O(2)- and NADP-reduction competitively inhibit Tc incorporation. As for O(2), the reaction can be stimulated by the auto-oxidizable electron acceptor methyl viologen. Furthermore TcO(4) (-) can function as terminal acceptor in the diaphorase reaction, with NADPH as electron donor.

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