DIAMINODUREN AS ELECTRON DONOR AND THE EFFECT OF UV-LIGHT ON PHOTOSYNTHETIC REACTIONS IN ISOLATED CHLOROPLASTS.

Abstract

Diaminoduren (2,3,5,6-tetramethyl- p-phenylenediamine, DAD) reverses the DCMU (dichlorphenyl dimethyl urea)inhibition of photosynthetic NADP-reduction and therefore acts as electron donor for the electron transport chain. The DAD-system is coupled to ATP-formation and gives the best rates of all electron donor systems known so far. In UV-irradiated chloroplasts the endogenous plastoquinone is destroyed. Such chloroplasts do not evolve oxygen anymore, but are still able to photoreduce NADP at the expense of an artificial electron donor system. Cyclic photo-phosphorylation with PMS as cofactor is less sensitive to UV-irradiation and at a certain stage of damage of the chloroplasts becomes inhibited by antimycin; indicating a second phosphorylation site. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1965
Accession Number
AD0619822

Entities

People

  • A. Trebst

Organizations

  • University of Göttingen

Tags

DTIC Thesaurus Topics

  • Electron Donors
  • Electrons
  • Inhibition
  • Phenylenediamines
  • Phosphorylation
  • Plastids
  • Transport Ships

Fields of Study

  • Chemistry

Readers

  • Breast cancer cell signaling and growth regulation.
  • Chemistry (specifically Chemical Fluorescence)

Technology Areas

  • Microelectronics