The role of respiration in the activation of photosynthesis upon illumination of dark adapted Chlamydomonas reinhardtii. (Articolo in rivista)

Type
Label
  • The role of respiration in the activation of photosynthesis upon illumination of dark adapted Chlamydomonas reinhardtii. (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Forti G. (2008)
    The role of respiration in the activation of photosynthesis upon illumination of dark adapted Chlamydomonas reinhardtii.
    in Biochimica et biophysica acta. Bioenergetics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Forti G. (literal)
Pagina inizio
  • 1449 (literal)
Pagina fine
  • 1454 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 1777 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Milan, Dipartimento Biol, I-20133 Milan, Italy; CNR, Ist Biofis, I-20133 Milan, Italy (literal)
Titolo
  • The role of respiration in the activation of photosynthesis upon illumination of dark adapted Chlamydomonas reinhardtii. (literal)
Abstract
  • It is reported that O(2) is required for the activation of photosynthesis in dark adapted Chlamydomonas reinhardtii in State 1, under low light intensity. The concentration of dissolved O(2) of ca. 9 microM is sufficient to saturate the requirement. When the concentration of O(2) is 3 muM or below, the activation of photosynthesis is strongly inhibited by myxothiazol, a specific inhibitor of the mitochondrial cytochrome bc(1). The effect of this inhibitor decreases as the O(2) concentration is raised, to disappear completely above 50 muM. Low concentrations of uncouplers delay the activation of photosynthesis, but do not inhibit it when steady state is reached. It is concluded that in State 1 C. reinhardtii mitochondrial respiration is required for the activation of photosynthesis upon illumination of dark adapted cells only when the concentration of O(2) is too low (less than 5 muM) to allow an appreciable activity of the Mehler reaction. The role of respiration does not seem to be due to the synthesis of ATP by oxidative phosphorylation, because photosynthesis activation is not sensitive to oligomycin. (literal)
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