Na-Dithionite Promotes Photosynthetic Sulfide Utilization by the Cyanobacterium Oscillatoria limnetica

Abstract
The light- and sulfide-dependent induction process leading to photosystem I-mediated sulfide utilization by Oscillatoria limnetica, for either H2 evolution or CO2 photoassimilation, was studied. The identical dependence on pH of the lag length, the inhibition of leucine incorporation and final H2S concentration imply that the latter exerts a deleterious effect on nonadapted cells.