Photochemical oxygen evolution by Chlorella fusca in glucose

Summary Oxygen is evolved from illuminated Chlorella fusca, in absence of CO₂, on addition of glucose, fructose, mannose, and, to a small extent, galactose. The amount of oxygen, as measured by manometry, is equivalent to the amount of carbon from glucose incorporated into lipids, as determined radiochemically. This amount is much more than that incorporated in light in presence of CO₂, or in the dark. The rate of evolution of oxygen with glucose is about twice that with acetate of similar molarity, after an initial burst of respiration in case of acetate.