Voltar
Artigo Revisado por pares
BIBTEX RIS

NADH and NADPH as electron donors to respiratory and photosynthethic electron transport in the blue-green alga, Aphanocapsa

1983; Elsevier BV; Volume: 725; Issue: 1 Linguagem: Inglês

10.1016/0005-2728(83)90242-6

ISSN

1879-2650

Autores

Gerhard Sandmann, Richard Malkin,

Tópico(s)

Algal biology and biofuel production

Resumo

In the blue-green alga, Aphanocapsa, light inhibits respiration. This can be observed with spheroplasts when O2 uptake is measured with NADH or NADPH as electron donor. However, NAD(P)H oxidation is unaffected by illumination. Furthermore, it was possible to demonstrate electron transfer from NAD(P)H to Photosystem I. Thus, the inhibition of respiratory oxygen uptake by light is explained by a competition of cytochrome oxidase and Photosystem I for reduction equivalents. Based on studies with inhibitors, electron transfer from NAD(P)H to Photosystem I involves the chloroplast cytochrome b6-f complex.

Referência(s)