Uncoupling of photosystems during light dependent dinitrogen fixation by a non-heterocystous cyanobacterium Plectonema boryanum.
Indian J Biochem Biophys
; 31(4): 310-4, 1994 Aug.
Article
en En
| MEDLINE
| ID: mdl-8002013
ABSTRACT
Plectonema boryanum grows under microaerobic nitrogen starvation conditions by temporal separation of the oxygen-sensitive nitrogen fixation and the oxygen-evolving photosynthesis. During the nitrogen-fixation phase, depression in light-dependent oxygen evolution results from alterations in the stare of QA/QB complex. The reaction centre in photosystem II is not oxidised efficiently. Light dependence of nitrogenase function under such conditions appears to be related to the coupling of photosystem I to endogenous electron donors, such as glycollate. This cyanobacterium provides a natural example of in vivo shift in coupling between the photosystems during nitrogen-fixing growth.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Cianobacterias
/
Fijación del Nitrógeno
Idioma:
En
Revista:
Indian J Biochem Biophys
Año:
1994
Tipo del documento:
Article