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

  • 4 July 1977
    • journal article
    • abstracts
    • Vol. 285  (1)
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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