PHOTOSYNTHESIS AND PHOTOREDUCTION BY THE BLUE GREEN ALGA, SYNECHOCOCCUS ELONGATUS, NÄG

Abstract

1. Enrichment cultures of Synechoccus elongatus Näg., a unicellular blue-green alga, carry out photosynthesis in a carbon-dioxide-bicarbonate buffer with a quotient of 1.08 ± .03. 2. This alga has a hydrogenase which can be activated anaerobically in the presence of molecular hydrogen. In the light, adapted algae can carry out photoreduction. 3. In contrast to Scenedesmus, activation of the hydrogenase can be carried out at low light intensities.