1.
Indian J Biochem Biophys
;
1994 Aug; 31(4): 310-4
Article
in English
| IMSEAR
| ID: sea-28828
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.
Subject(s)
Cyanobacteria/metabolism , Nitrogen Fixation/radiation effects , Photochemistry
2.
Indian J Exp Biol
;
1972 Mar; 10(2): 136-9
Article
in English
| IMSEAR
| ID: sea-56664