Null potential voltammetry - an approach to the study of Plant photosystems

  • Allen M
  • Crane A
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Abstract

A technique for "null" potential voltammetry has been applied to a study of the effects of light on "thin" films of plant thylakoid membranes. Use of this method yielded data which enabled evaluation of the electrical power produced by the biosystem as well as the resistance changes in this membrane material as a result of irradiation. Additional data obtained suggested that this technique also permits visualization of the mid-potential (Um) of what may be the "bridge" of the "Z" scheme which separates the reducing side of Photosystem I from the oxidizing side of Photosystem I, as well as the ultimate potential of charge transfer from the reducing side of Photosystem I to the detector electrode. The effects of various substances known to potentiate or inhibit electron transport within the photosystems are described. © 1976.

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Authors

  • M. J. Allen

  • A. E. Crane

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