FLASH PHOTOLYSIS‐ELECTRON SPIN RESONANCE STUDIES OF THE DYNAMICS OF PHOTOSYSTEM I IN GREEN‐PLANT PHOTOSYNTHESIS‐I. EFFECTS OF ACCEPTORS AND DONORS IN SUBCHLOROPLAST PARTICLES * | Zendy

Warden Joseph T. | Zendy; Bolton James R. | Zendy

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FLASH PHOTOLYSIS‐ELECTRON SPIN RESONANCE STUDIES OF THE DYNAMICS OF PHOTOSYSTEM I IN GREEN‐PLANT PHOTOSYNTHESIS‐I. EFFECTS OF ACCEPTORS AND DONORS IN SUBCHLOROPLAST PARTICLES *

Author(s) -

Warden Joseph T.,

Bolton James R.

Publication year - 1974

Publication title -

photochemistry and photobiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.818

H-Index - 131

eISSN - 1751-1097

pISSN - 0031-8655

DOI - 10.1111/j.1751-1097.1974.tb06575.x

Subject(s) - p700 , chemistry , flash photolysis , photochemistry , electron acceptor , photosystem i , electron donor , electron paramagnetic resonance , acceptor , kinetics , electron transfer , photodissociation , photosystem ii , photosynthesis , reaction rate constant , nuclear magnetic resonance , organic chemistry , catalysis , biochemistry , physics , quantum mechanics , condensed matter physics

—Transient decay kinetics of Signal I in spinach subchloroplast particles have been studied in the presence of artificial donors [5‐methyl phenazonium methyl sulfate (PMS), 2, 6‐dichlorophenolindophenol (DPIP), N, N, N', N'‐tetramethyl‐ p ‐phenylenediamine (TMPD) and ascorbate], artificial acceptors [benzyl viologen (BV) and methyl viologen (MV)] and various natural donor and acceptor moieties, using the technique of flash photolysis‐electron spin resonance spectroscopy. The results are discussed in the framework of three mechanisms for reduction of P700 + : (1) direct electron return from the primary acceptor to P700 + , (2) cyclic electron flow via an electron carrier, and (3) noncvclic electron flow.

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