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. 1977 Jul 4;285(1):27-30.

[Ultrastructural localization of photosystem I and II active sites in chloroplasts in situ]

[Article in French]
D Marty
  • PMID: 409543

[Ultrastructural localization of photosystem I and II active sites in chloroplasts in situ]

[Article in French]
D Marty. C R Acad Hebd Seances Acad Sci D. .

Abstract

Activities related to photosystem I and photosystem II are cytochemically localized at the electron microscope level by using suitable artificial electron donors and acceptors with, or without, factors uncoupling the light-induced electron flow between the two systems. Photo-oxidation of DAB, insensitive to DCMU, is linked to photosystem I activity. It occurs within the grana and stroma membranes of the chloroplasts. Photo-reduction of TC-NBT sensitive to DCMU, is a photosystem II mediated reaction. It is trapped within the grana membranes.

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