Evidence for the Participation of Cytochrome Oxidase in Photosynthetic Fixation of Carbon Dioxide.

This article studies the evidence for the participation of cytochrome oxidase in photosynthetic fixation of carbon dioxide. A researcher measured the utilization of carbon dioxide by cut leaves with a continous recording method, and found that if leaves were exposed to carbon dioxide mixed with pure nitrogen, the rate of photosytithetic assimilation of carbon dioxide was slowed down after short pt-riods of darkness under these anaerobic conditions. The inhibition was not reversed by exposure to light in the carbon dioxide-nitrogen mixture, but it was reversed by a short exposure to air in darkness.