Open AccessDestruction of a single chlorophyll is correlated with the photoinhibition of photosystem II with a transiently inactive donor side.
Author(s) -
Dirk Bumann,
Dieter Oesterhelt
Publication year - 1995
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.92.26.12195
Subject(s) - photoinhibition , photosystem ii , chlamydomonas reinhardtii , light harvesting complexes of green plants , chlorophyll , photochemistry , photosynthesis , photosystem i , chemistry , chlorophyll a , chlorophyll fluorescence , biophysics , p700 , botany , biology , biochemistry , mutant , gene
Pigments destroyed during photoinhibition of water-splitting photosystem II core complexes from the green alga Chlamydomonas reinhardtii were studied. Under conditions of a transiently inactivated donor side, illumination leads to an irreversible inhibition of the electron transfer at the donor side that is paralleled by the destruction of chlorophylls a absorbing maximally around 674 and 682 nm. The observed stochiometry of 1 +/- 0.1 destroyed chlorophyll per inhibited photosystem II suggests that chlorophyll destruction could be the primary photodamage causing the inhibition of photosystem II under these conditions.