Destruction of a single chlorophyll is correlated with the photoinhibition of photosystem II with a transiently inactive donor side.
AUTOR(ES)
Bumann, D
RESUMO
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.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=40323Documentos Relacionados
- Chlorophyll a dimer: A possible primary electron donor for the photosystem II
- Structure of donor side components in photosystem II predicted by computer modelling.
- Heterogeneity and Photoinhibition of Photosystem II Studied with Thermoluminescence1
- Reversible and irreversible intermediates during photoinhibition of photosystem II: stable reduced QA species promote chlorophyll triplet formation.
- Photosystem II Peripheral Accessory Chlorophyll Mutants in Chlamydomonas reinhardtii. Biochemical Characterization and Sensitivity to Photo-Inhibition12