Photosynthesis in Rhodospirillum rubrum. I. Autotrophic Carbon Dioxide Fixation
Open Access
- 1 April 1967
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 42 (4), 487-490
- https://doi.org/10.1104/pp.42.4.487
Abstract
The incorporation and distribution of activity from 14CO2 was investigated under autotrophic conditions in the facultative photoautotroph, Rhodospirillum rubrum, with cells cultured on hydrogen, carbon dioxide, and ammonium sulfate. In 1 second 14CO2 fixation experiments essentially all of the activity was found in 3-phosphoglyceric acid: plotted against time percent incorporation into phosphate esters has a strikingly negative slope. These results suggest that under autotrophic conditions the reductive pentose phosphate cycle or the key reactions of the cycle play a major role in carbon metabolism in this photosynthetic bacterium. Incorporation into amino acids and into intermediates of the tricarboxylic acid cycle was quite low.Keywords
This publication has 1 reference indexed in Scilit:
- A new ferredoxin-dependent carbon reduction cycle in a photosynthetic bacterium.Proceedings of the National Academy of Sciences of the United States of America, 1966