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  • Title: Photosynthesis in Rhodospirillum rubrum. I. Autotrophic carbon dioxide fixation.
    Author: Anderson L, Fuller RC.
    Journal: Plant Physiol; 1967 Apr; 42(4):487-90. PubMed ID: 6042357.
    Abstract:
    The incorporation and distribution of activity from (14)CO(2) was investigated under autotrophic conditions in the facultative photoautotroph, Rhodospirillum rubrum, with cells cultured on hydrogen, carbon dioxide, and ammonium sulfate. In 1 second (14)CO(2) 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.
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